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• NSMutableString leaks on append or replaceOccurrencesOfString

  - by John

  Hello Folks, I know similar questions have been asked time and time again but I ask that you please bear with me as I cannot seem to find an answer that helps. My application has leaks that are driving me out of my mind. Actually, they are not reported as leaks using Leaks, but my net bytes in ObjectAlloc goes up and up and up and never stops, eventually leading to a crash if it goes on long enough (not very long). The problem occurs with NSMutableStrings. I think there is either something fundamental I don't understand about them, or I am facing another problem that I am having difficulty tracking down but keeps hiding behind the NSMutableStrings. Specifically, I am noticing that whenever I append to or perform a replace on a NSMutableString, ObjectAlloc reports what appear to be mismatches in malloc/frees behind the scene when resizing the NSMutableString. I'm sorry to say this is the second time I'm facing this problem - the first time I messed around for hours and hours and finally the problem went away (magic!) but I don't really know why. When I look at the code below (and believe me, I've stared at it for hours) I cannot see the problem. I look at the code and think to myself that I should be fine because I'm releasing the only object for which I am responsible (aString) and that NSMutableString should be taking care of cleaning up after any resizing it does. In the second example, just so you know in case it helps, the string being passed in comes from an ASIHTTPRequest object (it's the responseString) and I don't do anything at all with it. It's being called simply like so ([self DoStuff2:[request responseString]]) and I don't free the request myself either (I'm using a ASINetworkQueue and I assume that the requests are destroyed for me (I tried and caused errors because the request was already being release somewhere else). Also, I know it shouldn't do anything, but I even tried wrapping the code in autorelease pools, which of course did nothing. I should mention that this code is being run inside of an NSOperation. I thought that perhaps I am experiencing problems because NSOperations should create an autorelease pool for themselves, but I've tried that to no avail. Not related to NSMutableString, but I find I also have similar problems using the NSString componentsSeparatedByString method. Sometimes the memory used by the array that gets the separated components is never released. Hmmm...strings in general seem to be somewhat problematic for me it seems. I would appreciate ANY help anyone can provide. If you require more info, I'll be glad to add it. I do promise you that I've struggled with this (and other problems) for weeks and every problem I encounter I research hard and long until I find a solution - this is not an idle request, but a true cry for help! I've written so much code and now I'm trying to seal some small leaks etc and I notice this problem. Honestly, I cannot believe how memory management in Objective C can stump me so at times...I've read Apple's memory mgmt docs many times and I thought I thoroughly understood it and I try to be diligent about releasing objects I own, but sometimes I find myself wondering if I truly understand...I would like to put this to bed once and make sure I understand all this fully - to have this sort of question/problem after writing thousands of lines of code is more than a little scary/embarrassing/annoying. So again, if anybody has any insight, I'd be grateful. Thanks for your time and efforts. -(void)DoStuff { NSString *aString [ [[NSString alloc] initWithFormat:@"text %@ more text", self.strVariable]; [self.someMutableStringVar replaceOccurrencesOfString:@"replace" withString:aString options:NSCaseInsensitiveSearch range:NSMakeRange(0, [self.someMutableStringVar length])]; [aString release]; } -(void)DoStuff2:(NSString *)aString { [self.someMutableStringVar appendString:aString]; }

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• Getting Custom NSCell with NSButtonCell instance to handle mouse click/mouse events

  - by sidha

  OK I'm really stumped on this one. I want to make a checkbox with a NSTextFieldCell combined together. It's important that the checkbox goes ON if the mouse hits the box, NOT the text. I've accomplished this, more or less, but the issue is receiving the mouse event because I click one checkbox in a row, but ALL of them turn to NSOnState. I will show what I've done and my various failed attempts in order to get this to work. So this is how I've done it so far: header: @interface MyCheckboxCellToo : NSTextFieldCell { NSButtonCell *_checkboxCell; } implementation: - (NSUInteger)hitTestForEvent:(NSEvent *)event inRect:(NSRect)cellFrame ofView:(NSView *)controlView { NSPoint point = [controlView convertPoint:[event locationInWindow] fromView:nil]; NSLog(@"%@", NSStringFromPoint(point)); NSRect checkFrame; NSDivideRect(cellFrame, &checkFrame, &cellFrame, cellFrame.size.height/*3 + [[_checkboxCell image] size].width*/, NSMinXEdge); if (NSMouseInRect(point, checkFrame, [controlView isFlipped])) { // the checkbox, or the small region around it, was hit. so let's flip the state NSCellStateValue checkState = ([_checkboxCell state] == NSOnState) ? NSOffState:NSOnState; [self setState:checkState]; [_checkboxCell setState:checkState]; [controlView setNeedsDisplay:YES]; return NSCellHitTrackableArea; } return [super hitTestForEvent:event inRect:cellFrame ofView:controlView]; } I know I probably shouldn't be doing: [self setState:checkState]; [_checkboxCell setState:checkState]; [controlView setNeedsDisplay:YES]; in there... because the result is that EVERY checkbox in every goes to NSOnState. Is this because cells are re-used? How come the ImageAndTextCell can have different images in the same tableview? How do I handle the mouse event? I have tried: - (BOOL)trackMouse:(NSEvent *)theEvent inRect:(NSRect)cellFrame ofView:(NSView *)controlView untilMouseUp:(BOOL)untilMouseUp { NSLog(@"%s %@", _cmd, theEvent); return [_checkboxCell trackMouse:theEvent inRect:cellFrame ofView:controlView untilMouseUp:untilMouseUp]; // return YES; // return [super trackMouse:theEvent inRect:cellFrame ofView:controlView untilMouseUp:untilMouseUp]; } - (BOOL)startTrackingAt:(NSPoint)startPoint inView:(NSView *)controlView { NSLog(@"%s %@", _cmd, NSStringFromPoint(startPoint)); return [super startTrackingAt:startPoint inView:controlView]; } - (BOOL)continueTracking:(NSPoint)lastPoint at:(NSPoint)currentPoint inView:(NSView *)controlView { NSLog(@"%s %@", _cmd, NSStringFromPoint(currentPoint)); return [super continueTracking:lastPoint at:currentPoint inView:controlView]; } - (void)stopTracking:(NSPoint)lastPoint at:(NSPoint)stopPoint inView:(NSView *)controlView mouseIsUp:(BOOL)flag { NSLog(@"%s %d %@", _cmd, flag, NSStringFromPoint(stopPoint)); } trackMouse: ... DOES gets called but startTrackingAt:..., continueTracking:..., and stopTracking:.... DO NOT get called when I click on the checkbox "hit area" in trackMouse:... I have tried return [_checkboxCell trackMouse:theEvent inRect:cellFrame ofView:controlView untilMouseUp:untilMouseUp]; and return [super trackMouse:theEvent inRect:cellFrame ofView:controlView untilMouseUp:untilMouseUp]; and neither seems to result in the mouse event being handled by the checkbox. How do I get that single checkbox to go NSOnState? I know I'm pretty close but after a lot of doc reading and google searching I haven't been successful at solving this. suggestions and comments welcome.. OK here is a bit more to show creation and destruction of the object.. - (id)init { if ((self = [super init])) { _checkboxCell = [[NSButtonCell alloc] init]; [_checkboxCell setButtonType:NSSwitchButton]; [_checkboxCell setTitle:@""]; [_checkboxCell setTarget:self]; [_checkboxCell setImagePosition:NSImageLeft]; [_checkboxCell setControlSize:NSRegularControlSize]; } return self; } - copyWithZone:(NSZone *)zone { MyCheckboxCellToo *cell = (MyCheckboxCellToo *)[super copyWithZone:zone]; cell->_checkboxCell = [_checkboxCell copyWithZone:zone]; return cell; } - (void)dealloc { [_checkboxCell release]; [super dealloc]; }

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• How to disable multiple touches on a ScrollView and UIImage

  - by Rob

  I have a scrollview that I am loading images into that the user can touch and play a sound. However, the program is getting confused when I press one image with one finger and then another one with a different finger. It thinks you are pushing the same button again and therefore plays the sound again (so you have two of the same sounds playing at the same time even though you may have pressed a different sound button). I tried setting exclusiveTouch for each UIImage but that didn't seem to work in this case for some reason. What am I missing or is there a better way to do this? Here is some code: for creating buttons.... - (void) createButtons { CGRect myFrame = [self.outletScrollView bounds]; CGFloat gapX, gapY, x, y; int columns = 3; int myIndex = 0; int viewWidth = myFrame.size.width; int buttonsCount = [g_AppsList count]; float actualRows = (float) buttonsCount / columns; int rows = buttonsCount / columns; int buttonWidth = 100; int buttonHeight = 100; if (actualRows > rows) rows++; //set scrollview content size to hold all the glitter icons library gapX = (viewWidth - columns * buttonWidth) / (columns + 1); gapY = gapX; y = gapY; int contentHeight = (rows * (buttonHeight + gapY)) + gapY; [outletScrollView setContentSize: CGSizeMake(viewWidth, contentHeight)]; UIImage* myImage; NSString* buttonName; //center all buttons to view int i = 1, j = 1; for (i; i <= rows; i++) { //calculate gap between buttons gapX = (viewWidth - (buttonWidth * columns)) / (columns + 1); if (i == rows) { //this is the last row, recalculate gap and pitch gapX = (viewWidth - (buttonWidth * buttonsCount)) / (buttonsCount + 1); columns = buttonsCount; }//end else x = gapX; j = 1; for (j; j <= columns; j++) { //get shape name buttonName = [g_AppsList objectAtIndex: myIndex]; buttonName = [NSString stringWithFormat: @"%@.png", buttonName]; myImage = [UIImage imageNamed: buttonName]; TapDetectingImageView* imageView = [[TapDetectingImageView alloc] initWithImage: myImage]; [imageView setFrame: CGRectMake(x, y, buttonWidth, buttonHeight)]; [imageView setTag: myIndex]; [imageView setContentMode:UIViewContentModeScaleToFill]; [imageView setUserInteractionEnabled: YES]; [imageView setMultipleTouchEnabled: NO]; [imageView setExclusiveTouch: YES]; [imageView setDelegate: self]; //add button to current view [outletScrollView addSubview: imageView]; [imageView release]; x = x + buttonWidth + gapX; //increase button index myIndex++; }//end for j //increase y y = y + buttonHeight + gapY; //decrease buttons count buttonsCount = buttonsCount - columns; }//end for i } and for playing the sounds... - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { //stop playing theAudio.stop; // cancel any pending handleSingleTap messages [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(handleSingleTap) object:nil]; UITouch* touch = [[event allTouches] anyObject]; NSString* filename = [g_AppsList objectAtIndex: [touch view].tag]; NSString *path = [[NSBundle mainBundle] pathForResource: filename ofType:@"m4a"]; theAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL]; theAudio.delegate = self; [theAudio prepareToPlay]; [theAudio setNumberOfLoops:-1]; [theAudio setVolume: g_Volume]; [theAudio play]; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { BOOL allTouchesEnded = ([touches count] == [[event touchesForView:self] count]); if (allTouchesEnded) { //stop playing theAudio.stop; }//end if //stop playing theAudio.stop; }

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• CryptoExcercise Encryption/Decryption Problem

  - by venkat

  I am using apples "cryptoexcercise" (Security.Framework) in my application to encrypt and decrypt a data of numeric value. When I give the input 950,128 the values got encrypted, but it is not getting decrypted and exists with the encrypted value only. This happens only with the mentioned numeric values. Could you please check this issue and give the solution to solve this problem? here is my code (void)testAsymmetricEncryptionAndDecryption { uint8_t *plainBuffer; uint8_t *cipherBuffer; uint8_t *decryptedBuffer; const char inputString[] = "950"; int len = strlen(inputString); if (len > BUFFER_SIZE) len = BUFFER_SIZE-1; plainBuffer = (uint8_t *)calloc(BUFFER_SIZE, sizeof(uint8_t)); cipherBuffer = (uint8_t *)calloc(CIPHER_BUFFER_SIZE, sizeof(uint8_t)); decryptedBuffer = (uint8_t *)calloc(BUFFER_SIZE, sizeof(uint8_t)); strncpy( (char *)plainBuffer, inputString, len); NSLog(@"plain text : %s", plainBuffer); [self encryptWithPublicKey:(UInt8 *)plainBuffer cipherBuffer:cipherBuffer]; NSLog(@"encrypted data: %s", cipherBuffer); [self decryptWithPrivateKey:cipherBuffer plainBuffer:decryptedBuffer]; NSLog(@"decrypted data: %s", decryptedBuffer); free(plainBuffer); free(cipherBuffer); free(decryptedBuffer); } (void)encryptWithPublicKey:(uint8_t *)plainBuffer cipherBuffer:(uint8_t *)cipherBuffer { OSStatus status = noErr; size_t plainBufferSize = strlen((char *)plainBuffer); size_t cipherBufferSize = CIPHER_BUFFER_SIZE; NSLog(@"SecKeyGetBlockSize() public = %d", SecKeyGetBlockSize([self getPublicKeyRef])); // Error handling // Encrypt using the public. status = SecKeyEncrypt([self getPublicKeyRef], PADDING, plainBuffer, plainBufferSize, &cipherBuffer[0], &cipherBufferSize ); NSLog(@"encryption result code: %d (size: %d)", status, cipherBufferSize); NSLog(@"encrypted text: %s", cipherBuffer); } (void)decryptWithPrivateKey:(uint8_t *)cipherBuffer plainBuffer:(uint8_t *)plainBuffer { OSStatus status = noErr; size_t cipherBufferSize = strlen((char *)cipherBuffer); NSLog(@"decryptWithPrivateKey: length of buffer: %d", BUFFER_SIZE); NSLog(@"decryptWithPrivateKey: length of input: %d", cipherBufferSize); // DECRYPTION size_t plainBufferSize = BUFFER_SIZE; // Error handling status = SecKeyDecrypt([self getPrivateKeyRef], PADDING, &cipherBuffer[0], cipherBufferSize, &plainBuffer[0], &plainBufferSize ); NSLog(@"decryption result code: %d (size: %d)", status, plainBufferSize); NSLog(@"FINAL decrypted text: %s", plainBuffer); } (SecKeyRef)getPublicKeyRef { OSStatus sanityCheck = noErr; SecKeyRef publicKeyReference = NULL; if (publicKeyRef == NULL) { NSMutableDictionary *queryPublicKey = [[NSMutableDictionary alloc] init]; // Set the public key query dictionary. [queryPublicKey setObject:(id)kSecClassKey forKey:(id)kSecClass]; [queryPublicKey setObject:publicTag forKey:(id)kSecAttrApplicationTag]; [queryPublicKey setObject:(id)kSecAttrKeyTypeRSA forKey:(id)kSecAttrKeyType]; [queryPublicKey setObject:[NSNumber numberWithBool:YES] forKey:(id)kSecReturnRef]; // Get the key. sanityCheck = SecItemCopyMatching((CFDictionaryRef)queryPublicKey, (CFTypeRef *)&publicKeyReference); if (sanityCheck != noErr) { publicKeyReference = NULL; } [queryPublicKey release]; } else { publicKeyReference = publicKeyRef; } return publicKeyReference; } (SecKeyRef)getPrivateKeyRef { OSStatus resultCode = noErr; SecKeyRef privateKeyReference = NULL; if(privateKeyRef == NULL) { NSMutableDictionary * queryPrivateKey = [[NSMutableDictionary alloc] init]; // Set the private key query dictionary. [queryPrivateKey setObject:(id)kSecClassKey forKey:(id)kSecClass]; [queryPrivateKey setObject:privateTag forKey:(id)kSecAttrApplicationTag]; [queryPrivateKey setObject:(id)kSecAttrKeyTypeRSA forKey:(id)kSecAttrKeyType]; [queryPrivateKey setObject:[NSNumber numberWithBool:YES] forKey:(id)kSecReturnRef]; // Get the key. resultCode = SecItemCopyMatching((CFDictionaryRef)queryPrivateKey, (CFTypeRef *)&privateKeyReference); NSLog(@"getPrivateKey: result code: %d", resultCode); if(resultCode != noErr) { privateKeyReference = NULL; } [queryPrivateKey release]; } else { privateKeyReference = privateKeyRef; } return privateKeyReference; }

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• Win32: IProgressDialog will not disappear until you mouse over it.

  - by Ian Boyd

  i'm using the Win32 progress dialog. The damnest thing is that when i call: progressDialog.StopProgressDialog(); it doesn't disappear. It stays on screen until the user moves her mouse over it - then it suddenly disappers. The call to StopProgressDialog returns right away (i.e. it's not a synchronous call). i can prove this by doing things after the call has returned: private void button1_Click(object sender, EventArgs e) { //Force red background to prove we've started this.BackColor = Color.Red; this.Refresh(); //Start a progress dialog IProgressDialog pd = (IProgressDialog)new ProgressDialog(); pd.StartProgressDialog(this.Handle, null, PROGDLG.Normal, IntPtr.Zero); //The long running operation System.Threading.Thread.Sleep(10000); //Stop the progress dialog pd.SetLine(1, "Stopping Progress Dialog", false, IntPtr.Zero); pd.StopProgressDialog(); pd = null; //Return form to normal color to prove we've stopped. this.BackColor = SystemColors.Control; this.Refresh(); } The form: starts gray turns red to show we've stared turns back to gray color to show we've called stop So the call to StopProgressDialog has returned, except the progress dialog is still sitting there, mocking me, showing the message: Stopping Progress Dialog Doesn't Appear for 10 seconds Additionally, the progress dialog does not appear on screen until the System.Threading.Thread.Sleep(10000); ten second sleep is over. Not limited to .NET WinForms The same code also fails in Delphi, which is also an object wrapper around Window's windows: procedure TForm1.Button1Click(Sender: TObject); var pd: IProgressDialog; begin Self.Color := clRed; Self.Repaint; pd := CoProgressDialog.Create; pd.StartProgressDialog(Self.Handle, nil, PROGDLG_NORMAL, nil); Sleep(10000); pd.SetLine(1, StringToOleStr('Stopping Progress Dialog'), False, nil); pd.StopProgressDialog; pd := nil; Self.Color := clBtnFace; Self.Repaint; end; PreserveSig An exception would be thrown if StopProgressDialog was failing. Most of the methods in IProgressDialog, when translated into C# (or into Delphi), use the compiler's automatic mechanism of converting failed COM HRESULTS into a native language exception. In other words the following two signatures will throw an exception if the COM call returned an error HRESULT (i.e. a value less than zero): //C# void StopProgressDialog(); //Delphi procedure StopProgressDialog; safecall; Whereas the following lets you see the HRESULT's and react yourself: //C# [PreserveSig] int StopProgressDialog(); //Delphi function StopProgressDialog: HRESULT; stdcall; HRESULT is a 32-bit value. If the high-bit is set (or the value is negative) it is an error. i am using the former syntax. So if StopProgressDialog is returning an error it will be automatically converted to a language exception. Note: Just for SaG i used the [PreserveSig] syntax, the returned HRESULT is zero; MsgWait? The symptom is similar to what Raymond Chen described once, which has to do with the incorrect use of PeekMessage followed by MsgWaitForMultipleObjects: "Sometimes my program gets stuck and reports one fewer record than it should. I have to jiggle the mouse to get the value to update. After a while longer, it falls two behind, then three..." But that would mean that the failure is in IProgressDialog, since it fails equally well on CLR .NET WinForms and native Win32 code.

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• Passing Variables between views / view controllers

  - by Dan

  Hi I'm new to ObjectiveC / IPhoneSDK and I'm informally trying to study it on my own. What I'm basically trying to do is from one view there are 12 zodiac signs. When a user clicks one, it proceeds to the second view (with animation) and loads the name of the zodiac sign it clicked in a UILabel, that's it. Here are my codes: Lovescopes = 1st page Horoscopes = 2nd page Lovescopes4AppDelegate.h #import <UIKit/UIKit.h> #import "HoroscopesViewController.h" #import "Lovescopes4AppDelegate.h" @class Lovescopes4ViewController; @interface Lovescopes4AppDelegate : NSObject <UIApplicationDelegate> { UIWindow *window; Lovescopes4ViewController *viewController; HoroscopesViewController *horoscopesViewController; } -(void)loadHoroscope; -(void)loadMainPage; @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet Lovescopes4ViewController *viewController; @property (nonatomic, retain) HoroscopesViewController *horoscopesViewController; @end Lovescopes4AppDelegate.m #import "Lovescopes4AppDelegate.h" #import "Lovescopes4ViewController.h" @implementation Lovescopes4AppDelegate @synthesize window; @synthesize viewController; @synthesize horoscopesViewController; -(void)loadHoroscope { HoroscopesViewController *aHoroscopeViewController = [[HoroscopesViewController alloc] initWithNibName:@"HoroscopesViewController" bundle:nil]; [self setHoroscopesViewController:aHoroscopeViewController]; [aHoroscopeViewController release]; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.5]; [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:window cache:YES]; [viewController.view removeFromSuperview]; [self.window addSubview:[horoscopesViewController view]]; [UIView commitAnimations]; } -(void)loadMainPage { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.5]; [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:window cache:NO]; [horoscopesViewController.view removeFromSuperview]; [self.window addSubview:[viewController view]]; [UIView commitAnimations]; [horoscopesViewController release]; horoscopesViewController = nil; } - (void)applicationDidFinishLaunching:(UIApplication *)application { // Override point for customization after app launch [window addSubview:viewController.view]; [window makeKeyAndVisible]; } - (void)dealloc { [viewController release]; [window release]; [super dealloc]; } @end Lovescopes4ViewController.h #import <UIKit/UIKit.h> #import "HoroscopesViewController.h" @interface Lovescopes4ViewController : UIViewController { HoroscopesViewController *hvc; } -(IBAction)loadAries; @property (nonatomic, retain) HoroscopesViewController *hvc; @end Lovescope4ViewController.m #import "Lovescopes4ViewController.h" #import "Lovescopes4AppDelegate.h" @implementation Lovescopes4ViewController @synthesize hvc; -(IBAction)loadAries { NSString *selected =@"Aries"; [hvc loadZodiac:selected]; Lovescopes4AppDelegate *mainDelegate = (Lovescopes4AppDelegate *) [[UIApplication sharedApplication] delegate]; [mainDelegate loadHoroscope]; } HoroscopesViewController.h #import <UIKit/UIKit.h> @interface HoroscopesViewController : UIViewController { IBOutlet UILabel *zodiacLabel; } -(void)loadZodiac:(id)zodiacSign; -(IBAction)back; @property (nonatomic, retain) IBOutlet UILabel *zodiacLabel; @end HoroscopesViewController.m #import "HoroscopesViewController.h" #import "Lovescopes4AppDelegate.h" @implementation HoroscopesViewController @synthesize zodiacLabel; /* // The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) { // Custom initialization } return self; } */ /* // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; } */ /* // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } */ -(void)loadZodiac:(id)zodiacSign { zodiacLabel.text = [NSString stringWithFormat: @"%@", zodiacSign]; } -(IBAction)back { Lovescopes4AppDelegate *mainDelegate = (Lovescopes4AppDelegate *) [[UIApplication sharedApplication] delegate]; [mainDelegate loadMainPage]; }

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• iPhone dev - viewDidUnload subviews

  - by Mk12

  I'm having a hard time undestand a couple of the methods in UIViewController, but first I'll say what I think they are meant for (ignoring interface builder because I'm not using it): -init: initialize non view-related stuff that won't need to be released in low memory situations (i.e. not objects or objects that can't be recreated easily). -loadView: create the view set the [self view] property. -viewDidLoad: Create all the other view elements -viewDidUnload: Release objects created in -viewDidLoad. didReceiveMemoryWarning: Low-memory situation, release unnecessary things such as cached data, if this view doesn't have a superview then the [super didReceiveMemoryWarning] will go on to release (unload) the view and call -viewDidUnload. -dealloc: release everything -viewWillAppear:, -viewDidAppear:, -viewWillDisappear:, -viewDidDisappear: self-explanatory, not necessary unless you want to respond (do something) to those events. I'm not sure about a couple of things. First, the Apple docs say that when -viewDidUnload is called, the view has already been released and set to nil. Will -loadView get called again to recreate the view later on? There's a few things I created in -viewDidLoad that I didn't make a ivar/property for because there is no need and it will be retained by the view (because they are subviews of it). So when the view is released, it will release those too, right? When the view is released, will it release all its subviews? Because all the objects I created in -viewDidLoad are subviews of [self view]. So if they already get released why release them again in -viewDidUnload? I can understand data that is necessary when the view is visible being loaded and unloaded in these methods, but like I asked, why release the subviews if they already get released? EDIT: After reading other questions, I think I might have got it (my 2nd question). In the situation where I just use a local variable, alloc it, make it a subview and release, it will have a retain count of 1 (from adding it as a subview), so when the view is released it is too. Now for the view elements with ivars pointing to them, I wasn't using properties because no outside class would need to access them. But now I think that that's wrong, because in this situation: // MyViewController.h @interface MyViewController : UIViewController { UILabel *myLabel; } // MyViewController.m . . . - (void)viewDidLoad { myLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 40, 10)]; [myLabel setText:@"Foobar"]; [[self view] addSubview:myLabel]; } - (void)viewDidUnload [ // equivalent of [self setMyLabel:nil]; without properties [myLabel release]; myLabel = nil; } In that situation, the label will be sent the -release message after it was deallocated because the ivar didn't retain it (because it wasn't a property). But with a property the retain count would be two: the view retaining it and the property. So then in -viewDidUnload it will get deallocated. So its best to just always use properties for these things, am I right? Or not? EDIT: I read somewhere that -viewDidLoad and -viewDidUnload are only for use with Interface Builder, that if you are doing everything programmatically you shouldn't use them. Is that right? Why?

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• Implementing ZBar QR Code Reader in UIView

  - by Bobster4300

  I really need help here. I'm pretty new to iOS/Objective-C so sorry if the problem resolution is obvious or if my code is terrible. Be easy on me!! :-) I'm struggling to integrate ZBarSDK for reading QR Codes into an iPad app i'm building. If I use ZBarReaderController (of which there are plenty of tutorials and guides on implementing), it works fine. However I want to make the camera come up in a UIView as opposed to the fullscreen camera. Now I have gotten as far as making the camera view (readerView) come up in the UIView (ZBarReaderView) as expected, but I get an error when it scans a code. The error does not come up until a code is scanned making me believe this is either delegate related or something else. Here's the important parts of my code: (ZBarSDK.h is imported at the PCH file) SignInViewController.h #import <UIKit/UIKit.h> #import <AVFoundation/AVFoundation.h> @class AVCaptureSession, AVCaptureDevice; @interface SignInViewController : UIViewController < ZBarReaderDelegate > { ZBarReaderView *readerView; UITextView *resultText; } @property (nonatomic, retain) UIImagePickerController *imgPicker; @property (strong, nonatomic) IBOutlet UITextView *resultText; @property (strong, nonatomic) IBOutlet ZBarReaderView *readerView; -(IBAction)StartScan:(id) sender; SignInViewController.m #import "SignInViewController.h" @interface SignInViewController () @end @implementation SignInViewController @synthesize resultText, readerView; -(IBAction)StartScan:(id) sender { readerView = [ZBarReaderView new]; readerView.readerDelegate = self; readerView.tracksSymbols = NO; readerView.frame = CGRectMake(30,70,230,230); readerView.torchMode = 0; readerView.device = [self frontFacingCameraIfAvailable]; ZBarImageScanner *scanner = readerView.scanner; [scanner setSymbology: ZBAR_I25 config: ZBAR_CFG_ENABLE to: 0]; [self relocateReaderPopover:[self interfaceOrientation]]; [readerView start]; [self.view addSubview: readerView]; resultText.hidden=NO; } - (void) readerControllerDidFailToRead: (ZBarReaderController*) reader withRetry: (BOOL) retry{ NSLog(@"the image picker failing to read"); } - (void) imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo: (NSDictionary*) info { NSLog(@"the image picker is calling successfully %@",info); id<NSFastEnumeration> results = [info objectForKey: ZBarReaderControllerResults]; ZBarSymbol *symbol = nil; NSString *hiddenData; for(symbol in results) hiddenData=[NSString stringWithString:symbol.data]; NSLog(@"the symbols is the following %@",symbol.data); resultText.text=symbol.data; NSLog(@"BARCODE= %@",symbol.data); NSLog(@"SYMBOL : %@",hiddenData); resultText.text=hiddenData; } The error I get when a code is scanned: 2012-12-16 14:28:32.797 QRTestApp[7970:907] -[SignInViewController readerView:didReadSymbols:fromImage:]: unrecognized selector sent to instance 0x1e88b1c0 2012-12-16 14:28:32.799 QRTestApp[7970:907] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[SignInViewController readerView:didReadSymbols:fromImage:]: unrecognized selector sent to instance 0x1e88b1c0' I'm not too worried about what happens with the results just yet, just want to get over this error. Took me ages just to get the camera to come up in the UIView due to severe lack of tutorial or documentation on ZBarReaderView (for beginners anyway). Thanks all.

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• Zooming out to fit all annotations in MapKit

  - by Krismutt

  Hey everybody!! I wanna zoom out so that all my annotations(my location and one more annotation) fit to the screen...what do I do wrong?? I get the following warning: "'getDistanceFrom:' is deprecated".... -(void)viewDidLoad { [super viewDidLoad]; mapView = [[MKMapView alloc] initWithFrame:self.view.bounds]; mapView.showsUserLocation = TRUE; mapView.delegate = self; mapView.mapType = MKMapTypeStandard; mapView.zoomEnabled = YES; mapView.scrollEnabled = YES; mapView.userInteractionEnabled = YES; [mapView.userLocation setTitle:@"Nuvarande plats"]; [mapView.userLocation setSubtitle:@"Du är här"]; [self.view insertSubview:mapView atIndex:0]; self.locationManager = [[[CLLocationManager alloc] init] autorelease]; locationManager.delegate = self; locationManager.desiredAccuracy = kCLLocationAccuracyBest; [locationManager startUpdatingLocation]; [mapView release]; } -(void) locationManager: (CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{ NSLog (@"Position uppdateras" ); location = newLocation.coordinate; if (friZoom) { MKCoordinateRegion region; region.center.latitude = location.latitude; region.center.longitude= location.longitude; MKCoordinateSpan span; span.latitudeDelta = 0.01; span.longitudeDelta = 0.01; region.span = span; [mapView setRegion:region animated:TRUE];} } - (MKAnnotationView *)mapView:(MKMapView *)mapview viewForAnnotation:(id <MKAnnotation>)knappnal { if ([knappnal isKindOfClass:MKUserLocation.class]) { return nil; } MKPinAnnotationView *knappnalView = (MKPinAnnotationView*)[mapview dequeueReusableAnnotationViewWithIdentifier:@"annot"]; if (!knappnalView) { knappnalView = [[[MKPinAnnotationView alloc] initWithAnnotation:knappnal reuseIdentifier:@"annot"] autorelease]; knappnalView.pinColor = MKPinAnnotationColorRed; knappnalView.animatesDrop = YES; knappnalView.canShowCallout = YES; } else { knappnalView.annotation = knappnal; } return knappnalView; } - (IBAction)storeLocationInfo:(id) sender{ SparaPosition *position=[[SparaPosition alloc] initWithCoordinate:location]; [mapView addAnnotation:position]; savedPosition = location; } - (IBAction)visaPosition:(id)sender{ CLLocationCoordinate2D southWest =location; CLLocationCoordinate2D northEast =savedPosition; southWest.latitude = MIN(southWest.latitude, location.latitude); southWest.longitude = MIN(southWest.longitude, location.longitude); northEast.latitude = MAX(northEast.latitude, savedPosition.latitude); northEast.longitude = MAX(northEast.longitude, savedPosition.longitude); CLLocation *locSouthWest = [[CLLocation alloc] initWithLatitude:southWest.latitude longitude:southWest.longitude]; CLLocation *locNorthEast = [[CLLocation alloc] initWithLatitude:northEast.latitude longitude:northEast.longitude]; CLLocationDistance meters = [locSouthWest getDistanceFrom:locNorthEast]; MKCoordinateRegion region; region.center.latitude = (southWest.latitude + northEast.latitude) / 2.0; region.center.longitude = (southWest.longitude + northEast.longitude) / 2.0; region.span.latitudeDelta = meters / 111319.5; region.span.longitudeDelta = 0.0; region = [mapView regionThatFits:region]; [mapView setRegion:region animated:YES]; [locSouthWest release]; [locNorthEast release]; } Would really appreciate an answer!

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• Why doe my UITableView only show two rows of each section?

  - by Mike Owens

  I have a UITableView and when I build it only two rows will be displayed. Each section has more than two cells to be displayed, I am confused since they are all done the same?`#import #import "Store.h" import "VideoViewController.h" @implementation Store @synthesize listData; // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [self createTableData]; [super viewDidLoad]; } (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } (void)viewDidUnload { //self.listData = nil; //[super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } pragma mark - pragma mark Table View Data Source Methods // Customize the number of sections in the table view. - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return [videoSections count]; } //Get number of rows -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [self.listData count]; } -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *StoreTableIdentifier = @"StoreTableIdentifier"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:StoreTableIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:StoreTableIdentifier] autorelease]; } cell.textLabel.text = [[[listData objectAtIndex:indexPath.section] objectAtIndex:indexPath.row] objectForKey:@"name"]; //Change font and color of tableView cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; cell.textLabel.font=[UIFont fontWithName:@"Georgia" size:16.0]; cell.textLabel.textColor = [UIColor brownColor]; return cell; } -(NSString *)tableView: (UITableView *)tableView titleForHeaderInSection: (NSInteger) section { return [videoSections objectAtIndex:section]; } -(void)tableView: (UITableView *)tableView didSelectRowAtIndexPath: (NSIndexPath *)indexPath { VideoViewController *videoViewController = [[VideoViewController alloc] initWithNibName: @"VideoViewController" bundle:nil]; videoViewController.detailURL = [[NSURL alloc] initWithString: [[[listData objectAtIndex:indexPath.section] objectAtIndex:indexPath.row] objectForKey:@"url"]]; videoViewController.title = [[[listData objectAtIndex:indexPath.section] objectAtIndex:indexPath.row] objectForKey:@"name"]; [self.navigationController pushViewController:videoViewController animated:YES]; [videoViewController release]; } pragma mark Table View Methods //Data in table cell -(void) createTableData { NSMutableArray *beginningVideos; NSMutableArray *intermediateVideos; videoSections = [[NSMutableArray alloc] initWithObjects: @"Beginning Videos", @"Intermediate Videos", nil]; beginningVideos = [[NSMutableArray alloc] init]; intermediateVideos = [[NSMutableArray alloc] init]; [beginningVideos addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Shirts", @"name", @"http://www.andalee.com/iPhoneVideos/testMovie.m4v", @"url", nil]]; [beginningVideos addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Posters", @"name", @"http://devimages.apple.com/iphone/samples/bipbopall.html", @"url", nil]]; [beginningVideos addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Stickers",@"name", @"http://www.andalee.com/iPhoneVideos/mov.MOV",@"url",nil]]; [beginningVideos addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Egyptian",@"name", @"http://www.andalee.com/iPhoneVideos/2ndMovie.MOV",@"url",nil]]; [intermediateVideos addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Drum Solo", @"name", @"http://www.andalee.com", @"url", nil]]; [intermediateVideos addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Veil", @"name", @"http://www.andalee.com", @"url", nil]]; [intermediateVideos addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Three Quarter Shimmy",@"name", @"http://www.andalee.com", @"url",nil]]; listData = [[NSMutableArray alloc] initWithObjects:beginningVideos, intermediateVideos, nil]; [beginningVideos release]; [intermediateVideos release]; } (void)dealloc { [listData release]; [videoSections release]; [super dealloc]; } @end `

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• can anyone help how to get data from a plist, precisely inside the array

  - by jix

  Can anyone help me with getting data from this plist? I'm having trouble accessing the values of the three objects in the plist. i can see all the list of countries in my tableView, but i can't see the prices when i tap on a cell . any help please thanks MY PLIST <plist version="1.0"> <dict> <key>Afghanistan 3</key> <array> <string>RC $1.65</string> <string>CC $2.36</string> <string>EC 0</string> </array> <key>Albania 1</key> <array> <string>RC FREE</string> <string>CC $1.01</string> </array> <key>Algeria 2</key> <array> <string>RC $0.27</string> <string>CC $0.85</string> </array> <key>Andorra 2</key> <array> <string>RC FREE</string> <string>CC $0.93</string> also my code that i have implemented in xcode 4.5 . cc is the calling rate that is in item 0 in the plist rc is the receiving rate that is in item 1 in the plist ec is the extra rate that is in item 2 in the plist how can i see the cc ,rc, & ec each in a label when i click the cell in the next view controller ? MY CODE NSString *ratesFile = [[NSBundle mainBundle] pathForResource:@"rates" ofType:@"plist"]; rates = [[NSDictionary alloc]initWithContentsOfFile:ratesFile]; NSArray * dictionaryKeys = [rates allKeys]; name = [dictionaryKeys sortedArrayUsingSelector:@selector(compare:)]; cc = [rates objectForKey:@"Item 0"]; rc = [rates objectForKey:@"Item 1"]; ec = [rates objectForKey:@"Item 2"]; - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [rates count]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; } NSString *countryName = [name objectAtIndex:indexPath.row]; cell.textLabel.text = countryName; } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { NSString *ccRate = [cc objectAtIndex:indexPath.row]; if (!self.detailViewController) { self.detailViewController = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:nil]; } self.detailViewController.detailItem = ccRate; [self.navigationController pushViewController:self.detailViewController animated:YES]; } thank in advance

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• iPhone multi-touch scale and rotate, how to prevent scale?

  - by russhill

  I have existing code for tracking multi-touch positions and then rotating and scaling the item - in this case an image - appropriately. The code works really well and in itself is perfect, however for this particular task, I need the rotation ONLY. I have spent time trying to work out what is going on in this routine, but maths is not my strong point so wanted to see if anyone could assist? - (CGAffineTransform)incrementalTransformWithTouches:(NSSet *)touches { NSArray *sortedTouches = [[touches allObjects] sortedArrayUsingSelector:@selector(compareAddress:)]; NSInteger numTouches = [sortedTouches count]; // No touches if (numTouches == 0) { return CGAffineTransformIdentity; } // Single touch if (numTouches == 1) { UITouch *touch = [sortedTouches objectAtIndex:0]; CGPoint beginPoint = *(CGPoint *)CFDictionaryGetValue(touchBeginPoints, touch); CGPoint currentPoint = [touch locationInView:self.superview]; return CGAffineTransformMakeTranslation(currentPoint.x - beginPoint.x, currentPoint.y - beginPoint.y); } // If two or more touches, go with the first two (sorted by address) UITouch *touch1 = [sortedTouches objectAtIndex:0]; UITouch *touch2 = [sortedTouches objectAtIndex:1]; CGPoint beginPoint1 = *(CGPoint *)CFDictionaryGetValue(touchBeginPoints, touch1); CGPoint currentPoint1 = [touch1 locationInView:self.superview]; CGPoint beginPoint2 = *(CGPoint *)CFDictionaryGetValue(touchBeginPoints, touch2); CGPoint currentPoint2 = [touch2 locationInView:self.superview]; double layerX = self.center.x; double layerY = self.center.y; double x1 = beginPoint1.x - layerX; double y1 = beginPoint1.y - layerY; double x2 = beginPoint2.x - layerX; double y2 = beginPoint2.y - layerY; double x3 = currentPoint1.x - layerX; double y3 = currentPoint1.y - layerY; double x4 = currentPoint2.x - layerX; double y4 = currentPoint2.y - layerY; // Solve the system: // [a b t1, -b a t2, 0 0 1] * [x1, y1, 1] = [x3, y3, 1] // [a b t1, -b a t2, 0 0 1] * [x2, y2, 1] = [x4, y4, 1] double D = (y1-y2)*(y1-y2) + (x1-x2)*(x1-x2); if (D < 0.1) { return CGAffineTransformMakeTranslation(x3-x1, y3-y1); } double a = (y1-y2)*(y3-y4) + (x1-x2)*(x3-x4); double b = (y1-y2)*(x3-x4) - (x1-x2)*(y3-y4); double tx = (y1*x2 - x1*y2)*(y4-y3) - (x1*x2 + y1*y2)*(x3+x4) + x3*(y2*y2 + x2*x2) + x4*(y1*y1 + x1*x1); double ty = (x1*x2 + y1*y2)*(-y4-y3) + (y1*x2 - x1*y2)*(x3-x4) + y3*(y2*y2 + x2*x2) + y4*(y1*y1 + x1*x1); return CGAffineTransformMake(a/D, -b/D, b/D, a/D, tx/D, ty/D); } I have tried to read up on the way matrix's work, but cannot figure it out entirely. More likely to be the issue is the calculations, which as I mention is not my strong point. What I need from this routine is a transform that performs my rotation but ignores scale - so the distance between the 2 finger touch points is ignored and scale is not affected. I have looked at other routines on the internet to handle multi-touch rotation but all the ones I tried had issues in some way or other, whereas the above code is spot on for scale and rotate actions. Any help appreciated!

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• Possible iphone animation timing/rendering bug?

  - by David

  Hi all, I have been working on an iphone apps for several weeks. Now I encounter an animation problem that I can't figure out how to resolve. Mayhbe you can help. Here is the details (a little long, bear with me): Basically the effect I want to achieve is, when user click a button, a loading view pops up, hiding the whole screen; and then the apps does a lot of heavy computation, which takes a few seconds. Once the computation is done, soem result views (something likes checkers on a checker board) are rendered under the loading view. Once all result views are rendered, I used animation animation to remove the loading view nand show the result views to the user. Here is what I do: when user click a button, run this code: [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:1.0]; [UIView setAnimationBeginsFromCurrentState:YES]; [UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.view cache:YES]; [UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(loadingViewInserted:finished:context:)]; // use a really high index number so it will always on top [self.view insertSubview:loadingViewController.view atIndex:1000]; [UIView commitAnimations]; In the "loadingViewInserted" function, it calls another function doing the heavy computation work. Once the computation is done, a lot of result views (like checkers on a checker board) are rendered under the loading view. for(int colIndex = 1; colIndex <= result.columns; colIndex++) { for(int rowIndex = 1; rowIndex <= result.rows; rowIndex++) { ResultView *rv = [ResultView resultViewWithData:results[colIndex][rowIndex]]; [self.view addSubview:rv]; } } Once all result views are added, following animation is invoked to remove the loading view: [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:1.0]; [UIView setAnimationBeginsFromCurrentState:YES]; [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.view cache:YES]; [loadingViewController.view removeFromSuperview]; [UIView commitAnimations]; By doing this, most of the time (maybe 90%) it does exactly what I want. However, sometime I see some weird result: the loading view shows up first as expected, then before it disappears, some result views, which suppose to be under the loading view, suddenly appears on top of the loading view; and some of them are partial rendered. And then the loading view curled up, and everything looks normal again. The weird situation only lasts for less than a second, but already bad enough to screw up the UI. I have tried all different kinds of thing to fix this (using another thread to remove the loading view, make the loading view non-transparent), but none of them works. The only thing that makes a little better is, I hide all the result views first; after the last animation finished, in its call back, unhide all result views. But this loses the nice effect that when curling up the loading view, the results are already there. At this point, I really think this is a bug in iphone (I compile it with OS 3.0) OS. Or maybe you can point out what I have done wrong (or could do differently). (thanks for finishing this long post, :-) )

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• Slow Javascript touch events on Android

  - by oneself

  I'm trying to write a simple html based drawing application (standalone simplified code attached bellow). I've tested this on the following devices: iPad 1 and 2: Works great ASUS T101 running Windows: Works great Samsung Galaxy Tab: Extremely slow and patchy -- unusable. Lenovo IdeaPad K1: Extremely slow and patchy -- unusable. Asus Transformer Prime: Noticeable lag compare with the iPad -- close to usable. The Asus tablet is running ICS, the other android tablets are running 3.1 and 3.2. I tested using the stock Android browser. I also tried the Android Chrome Beta, but that was even worse. My questions is why are the Android tablets so slow? Am I doing something wrong or is it an inherit problem with Android OS or browser, or is there anything I can do about it in my code? multi.html: <html> <body> <style media="screen"> canvas { border: 1px solid #CCC; } </style> <canvas style="" id="draw" height="450" width="922"></canvas> <script class="jsbin" src="jquery.js"></script> <script src="multi.js"></script> </body> </html> multi.js: var CanvasDrawr = function(options) { // grab canvas element var canvas = document.getElementById(options.id), ctxt = canvas.getContext("2d"); canvas.style.width = '100%' canvas.width = canvas.offsetWidth; canvas.style.width = ''; // set props from options, but the defaults are for the cool kids ctxt.lineWidth = options.size || Math.ceil(Math.random() * 35); ctxt.lineCap = options.lineCap || "round"; ctxt.pX = undefined; ctxt.pY = undefined; var lines = [,,]; var offset = $(canvas).offset(); var eventCount = 0; var self = { // Bind click events init: function() { // Set pX and pY from first click canvas.addEventListener('touchstart', self.preDraw, false); canvas.addEventListener('touchmove', self.draw, false); }, preDraw: function(event) { $.each(event.touches, function(i, touch) { var id = touch.identifier; lines[id] = { x : this.pageX - offset.left, y : this.pageY - offset.top, color : 'black' }; }); event.preventDefault(); }, draw: function(event) { var e = event, hmm = {}; eventCount += 1; $.each(event.touches, function(i, touch) { var id = touch.identifier, moveX = this.pageX - offset.left - lines[id].x, moveY = this.pageY - offset.top - lines[id].y; var ret = self.move(id, moveX, moveY); lines[id].x = ret.x; lines[id].y = ret.y; }); event.preventDefault(); }, move: function(i, changeX, changeY) { ctxt.strokeStyle = lines[i].color; ctxt.beginPath(); ctxt.moveTo(lines[i].x, lines[i].y); ctxt.lineTo(lines[i].x + changeX, lines[i].y + changeY); ctxt.stroke(); ctxt.closePath(); return { x: lines[i].x + changeX, y: lines[i].y + changeY }; }, }; return self.init(); }; $(function(){ var drawr = new CanvasDrawr({ id: "draw", size: 5 }); });

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• iPhone multi-touch move, scale and rotate, how to prevent scale?

  - by russhill

  I have existing code for tracking multi-touch positions and then moving, rotating and scaling the item - in this case an image - appropriately. The code works really well and in itself is perfect, however for this particular task, I need the movement and rotation ONLY. I have spent time trying to work out what is going on in this routine, but maths is not my strong point so wanted to see if anyone could assist? - (CGAffineTransform)incrementalTransformWithTouches:(NSSet *)touches { NSArray *sortedTouches = [[touches allObjects] sortedArrayUsingSelector:@selector(compareAddress:)]; NSInteger numTouches = [sortedTouches count]; // No touches if (numTouches == 0) { return CGAffineTransformIdentity; } // Single touch if (numTouches == 1) { UITouch *touch = [sortedTouches objectAtIndex:0]; CGPoint beginPoint = *(CGPoint *)CFDictionaryGetValue(touchBeginPoints, touch); CGPoint currentPoint = [touch locationInView:self.superview]; return CGAffineTransformMakeTranslation(currentPoint.x - beginPoint.x, currentPoint.y - beginPoint.y); } // If two or more touches, go with the first two (sorted by address) UITouch *touch1 = [sortedTouches objectAtIndex:0]; UITouch *touch2 = [sortedTouches objectAtIndex:1]; CGPoint beginPoint1 = *(CGPoint *)CFDictionaryGetValue(touchBeginPoints, touch1); CGPoint currentPoint1 = [touch1 locationInView:self.superview]; CGPoint beginPoint2 = *(CGPoint *)CFDictionaryGetValue(touchBeginPoints, touch2); CGPoint currentPoint2 = [touch2 locationInView:self.superview]; double layerX = self.center.x; double layerY = self.center.y; double x1 = beginPoint1.x - layerX; double y1 = beginPoint1.y - layerY; double x2 = beginPoint2.x - layerX; double y2 = beginPoint2.y - layerY; double x3 = currentPoint1.x - layerX; double y3 = currentPoint1.y - layerY; double x4 = currentPoint2.x - layerX; double y4 = currentPoint2.y - layerY; // Solve the system: // [a b t1, -b a t2, 0 0 1] * [x1, y1, 1] = [x3, y3, 1] // [a b t1, -b a t2, 0 0 1] * [x2, y2, 1] = [x4, y4, 1] double D = (y1-y2)*(y1-y2) + (x1-x2)*(x1-x2); if (D < 0.1) { return CGAffineTransformMakeTranslation(x3-x1, y3-y1); } double a = (y1-y2)*(y3-y4) + (x1-x2)*(x3-x4); double b = (y1-y2)*(x3-x4) - (x1-x2)*(y3-y4); double tx = (y1*x2 - x1*y2)*(y4-y3) - (x1*x2 + y1*y2)*(x3+x4) + x3*(y2*y2 + x2*x2) + x4*(y1*y1 + x1*x1); double ty = (x1*x2 + y1*y2)*(-y4-y3) + (y1*x2 - x1*y2)*(x3-x4) + y3*(y2*y2 + x2*x2) + y4*(y1*y1 + x1*x1); return CGAffineTransformMake(a/D, -b/D, b/D, a/D, tx/D, ty/D); } I have tried to read up on the way matrix's work, but cannot figure it out entirely. More likely to be the issue is the calculations, which as I mention is not my strong point. What I need from this routine is a transform that performs my movement and rotation but ignores scale - so the distance between the 2 finger touch points is ignored and scale is not affected. I have looked at other routines on the internet to handle multi-touch rotation but all the ones I tried had issues in some way or other (smoothness, jumping when lifting fingers etc), whereas the above code is spot on for move, scale and rotate actions. Any help appreciated!

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• YUM Update Failed - Error in POSTIN scriptlet in rpm package

  - by Tiffany Walker

  Running "yum update" and it gets to installing and then breaks. Not sure what the problem is. Google shows nothing. Error in POSTIN scriptlet in rpm package gtk2-2.18.9-10.el6.x86_64 error: error creating temporary file /var/tmp/rpm-tmp.NB84HC: Invalid argument error: Couldn't create temporary file for %post(gtk2-2.18.9-10.el6.x86_64): Invalid argument Updating : e2fsprogs-libs-1.41.12-12.el6.x86_64 44/378 Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/yum/rpmtrans.py", line 387, in callback self._instCloseFile( bytes, total, h ) File "/usr/lib/python2.6/site-packages/yum/rpmtrans.py", line 463, in _instCloseFile self.base.history.trans_data_pid_end(pid, state) File "/usr/lib/python2.6/site-packages/yum/history.py", line 858, in trans_data_pid_end """, ('TRUE', self._tid, pid, state)) File "/usr/lib/python2.6/site-packages/yum/sqlutils.py", line 168, in executeSQLQmark return cursor.execute(query, params) sqlite3.OperationalError: unable to open database file error: python callback <bound method RPMTransaction.callback of <yum.rpmtrans.RPMTransaction instance at 0x45c2290>> failed, aborting! With a check all: yum check Loaded plugins: fastestmirror, rhnplugin, security MySQL-client-5.5.27-1.cp.1132.x86_64 is obsoleted by MySQL-client-5.5.27-1.cp.1132.x86_64 MySQL-server-5.5.27-1.cp.1132.x86_64 is obsoleted by MySQL-server-5.5.27-1.cp.1132.x86_64 abrt-libs-2.0.8-6.el6.x86_64 is a duplicate with abrt-libs-2.0.4-14.el6.centos.x86_64 audit-libs-2.2-2.el6.x86_64 is a duplicate with audit-libs-2.1.3-3.el6.x86_64 bandmin-1.6.1-5.noarch has missing requires of perl(bandmin.conf) bandmin-1.6.1-5.noarch has missing requires of perl(bmversion.pl) bandmin-1.6.1-5.noarch has missing requires of perl(services.conf) 32:bind-libs-9.8.2-0.10.rc1.el6_3.3.x86_64 is a duplicate with 32:bind-libs-9.7.3-8.P3.el6_2.2.x86_64 cagefs-safebin-3.6-6.el6.cloudlinux.x86_64 is a duplicate with cagefs-safebin-3.5-1.el6.cloudlinux.x86_64 chkconfig-1.3.49.3-2.el6.x86_64 is a duplicate with chkconfig-1.3.49.3-1.el6_2.x86_64 cloudlinux-release-6-6.3.0.x86_64 is a duplicate with cloudlinux-release-6-6.2.2.x86_64 coreutils-8.4-19.el6.x86_64 is a duplicate with coreutils-8.4-16.el6.x86_64 coreutils-libs-8.4-19.el6.x86_64 is a duplicate with coreutils-libs-8.4-16.el6.x86_64 1:cups-libs-1.4.2-48.el6_3.1.x86_64 is a duplicate with 1:cups-libs-1.4.2-44.el6_2.3.x86_64 1:dbus-libs-1.2.24-7.el6_3.x86_64 is a duplicate with 1:dbus-libs-1.2.24-5.el6_1.x86_64 12:dhcp-common-4.1.1-31.P1.el6_3.1.x86_64 is a duplicate with 12:dhcp-common-4.1.1-25.P1.el6_2.1.x86_64 e2fsprogs-libs-1.41.12-12.el6.x86_64 is a duplicate with e2fsprogs-libs-1.41.12-11.el6.x86_64 exim-4.80-0.x86_64 has missing requires of perl(SafeFile) expat-2.0.1-11.el6_2.x86_64 is a duplicate with expat-2.0.1-9.1.el6.x86_64 frontpage-2002-SR1.2.i386 has missing requires of libexpat.so.0 gawk-3.1.7-10.el6.x86_64 is a duplicate with gawk-3.1.7-9.el6.x86_64 glib2-2.22.5-7.el6.x86_64 is a duplicate with glib2-2.22.5-6.el6.x86_64 glibc-2.12-1.80.el6_3.5.x86_64 is a duplicate with glibc-2.12-1.47.el6_2.12.x86_64 glibc-common-2.12-1.80.el6_3.5.x86_64 is a duplicate with glibc-common-2.12-1.47.el6_2.12.x86_64 gtk2-2.18.9-10.el6.x86_64 is a duplicate with gtk2-2.18.9-6.el6.centos.x86_64 kernel-firmware-2.6.32-320.4.1.lve1.1.4.el6.noarch is obsoleted by kernel-firmware-2.6.32-320.4.1.lve1.1.4.el6.noarch kernel-firmware-2.6.32-320.4.1.lve1.1.4.el6.noarch is obsoleted by kernel-firmware-2.6.32-379.5.1.lve1.1.9.6.1.el6.noarch kernel-firmware-2.6.32-379.5.1.lve1.1.9.6.1.el6.noarch is a duplicate with kernel-firmware-2.6.32-320.4.1.lve1.1.4.el6.noarch kernel-firmware-2.6.32-379.5.1.lve1.1.9.6.1.el6.noarch is obsoleted by kernel-firmware-2.6.32-320.4.1.lve1.1.4.el6.noarch kernel-firmware-2.6.32-379.5.1.lve1.1.9.6.1.el6.noarch is obsoleted by kernel-firmware-2.6.32-379.5.1.lve1.1.9.6.1.el6.noarch kernel-headers-2.6.32-379.5.1.lve1.1.9.6.1.el6.x86_64 is a duplicate with kernel-headers-2.6.32-320.4.1.lve1.1.4.el6.x86_64 keyutils-libs-1.4-4.el6.x86_64 is a duplicate with keyutils-libs-1.4-3.el6.x86_64 krb5-libs-1.9-33.el6_3.3.x86_64 is a duplicate with krb5-libs-1.9-22.el6_2.1.x86_64 libblkid-2.17.2-12.7.el6.x86_64 is a duplicate with libblkid-2.17.2-12.4.el6.x86_64 libcom_err-1.41.12-12.el6.x86_64 is a duplicate with libcom_err-1.41.12-11.el6.x86_64 libgcc-4.4.6-4.el6.x86_64 is a duplicate with libgcc-4.4.6-3.el6.x86_64 libselinux-2.0.94-5.3.el6.x86_64 is a duplicate with libselinux-2.0.94-5.2.el6.x86_64 libstdc++-4.4.6-4.el6.x86_64 is a duplicate with libstdc++-4.4.6-3.el6.x86_64 libtiff-3.9.4-6.el6_3.x86_64 is a duplicate with libtiff-3.9.4-5.el6_2.x86_64 libudev-147-2.42.el6.x86_64 is a duplicate with libudev-147-2.40.el6.x86_64 libuuid-2.17.2-12.7.el6.x86_64 is a duplicate with libuuid-2.17.2-12.4.el6.x86_64 libxml2-2.7.6-8.el6_3.3.x86_64 is a duplicate with libxml2-2.7.6-4.el6_2.4.x86_64 nspr-4.9.1-2.el6_3.x86_64 is a duplicate with nspr-4.8.9-3.el6_2.x86_64 nss-util-3.13.5-1.el6_3.x86_64 is a duplicate with nss-util-3.13.1-3.el6_2.x86_64 openssl-1.0.0-25.el6_3.1.x86_64 is a duplicate with openssl-1.0.0-20.el6_2.5.x86_64 python-2.6.6-29.el6_3.3.x86_64 is a duplicate with python-2.6.6-29.el6.x86_64 python-libs-2.6.6-29.el6_3.3.x86_64 is a duplicate with python-libs-2.6.6-29.el6.x86_64 readline-6.0-4.el6.x86_64 is a duplicate with readline-6.0-3.el6.x86_64 sed-4.2.1-10.el6.x86_64 is a duplicate with sed-4.2.1-7.el6.x86_64 tzdata-2012c-3.el6.noarch is a duplicate with tzdata-2012c-1.el6.noarch xmlrpc-c-1.16.24-1209.1840.el6.x86_64 is a duplicate with xmlrpc-c-1.16.24-1200.1840.el6_1.4.x86_64 xmlrpc-c-client-1.16.24-1209.1840.el6.x86_64 is a duplicate with xmlrpc-c-client-1.16.24-1200.1840.el6_1.4.x86_64 Error: check all Tried: #rm /var/lib/rpm/__db* #rpm --rebuilddb #yum clean all Tried also running yum-complete-transaction still won't finish the update. ls -ld /var/tmp/ drwxrwxrwt. 20 root root 12288 Oct 3 18:44 /var/tmp/ df -h /var/tmp/ Filesystem Size Used Avail Use% Mounted on /tmp 3.9G 1.2G 2.6G 32% /var/tmp Latest errors: Error: Protected multilib versions: libgcc-4.4.6-4.el6.i686 != libgcc-4.4.6-3.el6.x86_64 Error: Protected multilib versions: glibc-2.12-1.80.el6_3.5.i686 != glibc-2.12-1.47.el6_2.12.x86_64 EDITED: yum repolist Loaded plugins: fastestmirror, rhnplugin, security Loading mirror speeds from cached hostfile * cloudlinux-x86_64-server-6: cl.banahosting.com repo id repo name status cloudlinux-x86_64-server-6 CloudLinux Server 6 x86_64 10,948+725 repolist: 10,948 [~]# package-cleanup --dupes Loaded plugins: fastestmirror, rhnplugin xmlrpc-c-client-1.16.24-1209.1840.el6.x86_64 xmlrpc-c-client-1.16.24-1200.1840.el6_1.4.x86_64 bind-libs-9.7.3-8.P3.el6_2.2.x86_64 bind-libs-9.8.2-0.10.rc1.el6_3.3.x86_64 libblkid-2.17.2-12.4.el6.x86_64 libblkid-2.17.2-12.7.el6.x86_64 libtiff-3.9.4-5.el6_2.x86_64 libtiff-3.9.4-6.el6_3.x86_64 audit-libs-2.1.3-3.el6.x86_64 audit-libs-2.2-2.el6.x86_64 libstdc++-4.4.6-3.el6.x86_64 libstdc++-4.4.6-4.el6.x86_64 sed-4.2.1-10.el6.x86_64 sed-4.2.1-7.el6.x86_64 python-libs-2.6.6-29.el6_3.3.x86_64 python-libs-2.6.6-29.el6.x86_64 coreutils-libs-8.4-16.el6.x86_64 coreutils-libs-8.4-19.el6.x86_64 libudev-147-2.40.el6.x86_64 libudev-147-2.42.el6.x86_64 chkconfig-1.3.49.3-2.el6.x86_64 chkconfig-1.3.49.3-1.el6_2.x86_64 keyutils-libs-1.4-4.el6.x86_64 keyutils-libs-1.4-3.el6.x86_64 glibc-2.12-1.47.el6_2.12.x86_64 glibc-2.12-1.80.el6_3.5.x86_64 tzdata-2012c-3.el6.noarch tzdata-2012c-1.el6.noarch coreutils-8.4-19.el6.x86_64 coreutils-8.4-16.el6.x86_64 dbus-libs-1.2.24-7.el6_3.x86_64 dbus-libs-1.2.24-5.el6_1.x86_64 libxml2-2.7.6-4.el6_2.4.x86_64 libxml2-2.7.6-8.el6_3.3.x86_64 abrt-libs-2.0.8-6.el6.x86_64 abrt-libs-2.0.4-14.el6.centos.x86_64 expat-2.0.1-9.1.el6.x86_64 expat-2.0.1-11.el6_2.x86_64 python-2.6.6-29.el6.x86_64 python-2.6.6-29.el6_3.3.x86_64 gtk2-2.18.9-6.el6.centos.x86_64 gtk2-2.18.9-10.el6.x86_64 libcom_err-1.41.12-12.el6.x86_64 libcom_err-1.41.12-11.el6.x86_64 gawk-3.1.7-10.el6.x86_64 gawk-3.1.7-9.el6.x86_64 readline-6.0-4.el6.x86_64 readline-6.0-3.el6.x86_64 glibc-common-2.12-1.80.el6_3.5.x86_64 glibc-common-2.12-1.47.el6_2.12.x86_64 libselinux-2.0.94-5.2.el6.x86_64 libselinux-2.0.94-5.3.el6.x86_64 cups-libs-1.4.2-48.el6_3.1.x86_64 cups-libs-1.4.2-44.el6_2.3.x86_64 nspr-4.9.1-2.el6_3.x86_64 nspr-4.8.9-3.el6_2.x86_64 cagefs-safebin-3.5-1.el6.cloudlinux.x86_64 cagefs-safebin-3.6-6.el6.cloudlinux.x86_64 libuuid-2.17.2-12.4.el6.x86_64 libuuid-2.17.2-12.7.el6.x86_64 xmlrpc-c-1.16.24-1209.1840.el6.x86_64 xmlrpc-c-1.16.24-1200.1840.el6_1.4.x86_64 openssl-1.0.0-20.el6_2.5.x86_64 openssl-1.0.0-25.el6_3.1.x86_64 dhcp-common-4.1.1-25.P1.el6_2.1.x86_64 dhcp-common-4.1.1-31.P1.el6_3.1.x86_64 krb5-libs-1.9-33.el6_3.3.x86_64 krb5-libs-1.9-22.el6_2.1.x86_64 nss-util-3.13.5-1.el6_3.x86_64 nss-util-3.13.1-3.el6_2.x86_64 cloudlinux-release-6-6.2.2.x86_64 cloudlinux-release-6-6.3.0.x86_64 e2fsprogs-libs-1.41.12-11.el6.x86_64 e2fsprogs-libs-1.41.12-12.el6.x86_64 glib2-2.22.5-6.el6.x86_64 glib2-2.22.5-7.el6.x86_64 UPDATE 2 I removed all the dupes and then did update and got this: Updating : sudo-1.7.4p5-13.el6_3.x86_64 79/361 Error in POSTIN scriptlet in rpm package sudo-1.7.4p5-13.el6_3.x86_64 warning: /etc/sudoers created as /etc/sudoers.rpmnew error: error creating temporary file /var/tmp/rpm-tmp.hjTOqJ: Invalid argument error: Couldn't create temporary file for %post(sudo-1.7.4p5-13.el6_3.x86_64): Invalid argument Updating : pcre-7.8-6.el6.x86_64 80/361 Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/yum/rpmtrans.py", line 399, in callback self._instCloseFile( bytes, total, h ) File "/usr/lib/python2.6/site-packages/yum/rpmtrans.py", line 475, in _instCloseFile self.base.history.trans_data_pid_end(pid, state) File "/usr/lib/python2.6/site-packages/yum/history.py", line 858, in trans_data_pid_end """, ('TRUE', self._tid, pid, state)) File "/usr/lib/python2.6/site-packages/yum/sqlutils.py", line 168, in executeSQLQmark return cursor.execute(query, params) sqlite3.OperationalError: unable to open database file error: python callback <bound method RPMTransaction.callback of <yum.rpmtrans.RPMTransaction instance at 0x5c7cfc8>> failed, aborting! - [~]# lsattr /var/tmp/ -------------e- /var/tmp/cache_5b07945563e03aec1c44917886fd99a6 -------------e- /var/tmp/sess_6edfafda1a191f6986bd020ed945eea0 -------------e- /var/tmp/sess_1b837feecdd4c9e6aa6ecd81d41fda75 -------------e- /var/tmp/sess_70bec5f392b4f5f75ac444f5c82db2dc -------------e- /var/tmp/sess_24cd226ba0a370a6d3838a37745b2e15 -------------e- /var/tmp/nginx_proxy -------------e- /var/tmp/sess_19fb1dd060e42c9de8786ef34d7fcf6e -------------e- /var/tmp/sess_b4ac777076c5122a6e27d776de0a2fcb -------------e- /var/tmp/sess_5077441775ef8d07a2185e8fd48a4aa8 -------------e- /var/tmp/cache_4e71d930fe8250e222ae4d1dc39646ff -------------e- /var/tmp/sess_eb6eb29b38b55b85303c3137611f0a2faa15c21d -------------e- /var/tmp/sess_81e7e8d93b395f2c8d7e3fe12cc59e56 -------------e- /var/tmp/sess_05c7f305bdbf9a4c7af251d33ac59766 -------------e- /var/tmp/sess_0ad9369063a37b6b399688a835d69ed2 -------------e- /var/tmp/cache_c780deda617678faeea8f8a34395ac27 -------------e- /var/tmp/sess_9773332e3c99ee18dca0b05e8f02a41e -------------e- /var/tmp/sess_1d9b02b068ea81a3975599ddc12bcfb1 -------------e- /var/tmp/sess_1ffeff444123e924834dc5e80d07571e -------------e- /var/tmp/sess_aa56725471c84d9a06745c56dc499db7 -------------e- /var/tmp/sess_51e19964d7e1a164c63f4c72fa43475c33debbc0 -------------e- /var/tmp/sess_a83c7a05bb189a465b8813ff9e566aa8f9124079 -------------e- /var/tmp/sess_2f506ba5b77c61107871e8cf80393cdb -------------e- /var/tmp/sess_7bfe1578605b259ec5e4fd2200df4cd0 -------------e- /var/tmp/sess_f6e47011789d8d48d56dd78a398d98d5719414a7 -------------e- /var/tmp/sess_b7c43a90a8b8d8f02b0fffca77796ce5 -------------e- /var/tmp/sess_6c3e7103453ad4daba815bd96a903785 -------------e- /var/tmp/sess_86f32a22507d8410b3f0fc7d71a135d5 -------------e- /var/tmp/sess_aaf72d3e8cfb2f27ffdff61323f97e7553855a05 -------------e- /var/tmp/sess_5de4488e2ee03ac0f99ab9494573ccb1 -------------e- /var/tmp/sess_716d97bba4abdb38704a9e4212f6fddc -------------e- /var/tmp/sess_534908a9510a32eda13a5dc95ac022cc -------------e- /var/tmp/sess_626a58203d93427c79621ea4fec0906d -------------e- /var/tmp/sess_827ca92d10d3797f2c187c41764a7036 -------------e- /var/tmp/sess_6282962d77f7bead20e785fbdb9a3d8f -------------e- /var/tmp/cache_b012c8a729fc54a296a700ed92930a0e -------------e- /var/tmp/sess_631e5ba769773da056108d3fbd143963 -------------e- /var/tmp/cache_30bb7f1333ba5f96a229c91a3385d8b5 -------------e- /var/tmp/sess_93e085706b29c3e4e3593bfe39b1079e -------------e- /var/tmp/sess_abd78bd6c285d681c90de8c617747ab3 -------------e- /var/tmp/sess_e144544ed925569018e6607b05f43f253f75e2aa -------------e- /var/tmp/sess_5d3d036c772847a4508d3e100b173d84 -------------e- /var/tmp/sess_f35243d1f40bd8d9ce08940fafc00d93 -------------e- /var/tmp/sess_761c3ffa811b959638ed0b266741eaa4 -------------e- /var/tmp/mm.sem.sNdxjf -------------e- /var/tmp/sess_006d45dbd807291f7bffbd1db3707ed6 -------------e- /var/tmp/cache_2d0162aac9f87c1978ac644923a5e2fe -------------e- /var/tmp/sess_22c534418c380b72d105935b59713dd1 -------------e- /var/tmp/sess_94f72ef408567a15f6287c518e93898e -------------e- /var/tmp/cache_6fe03c83bb87489f3921db1c974dfc0e -------------e- /var/tmp/sess_48bbfa2a2a8793a62c7fd6a389a2763e -------------e- /var/tmp/mm.sem.ERERMV -------------e- /var/tmp/sess_20aba82c03a69b2dc6af66c499c38ee67e27368f -------------e- /var/tmp/sess_f94fe0589a79c934815ef359bcb0a16c7080d937 -------------e- /var/tmp/sess_460390801eb004593b4dee83779f414e -------------e- /var/tmp/spamd-52811-init -------------e- /var/tmp/cache_6427fdb235d59b0b2fbd105bf23d2e87 -------------e- /var/tmp/cache_4ce12d8350d7c0361dc1bf15d552a2d8 -------------e- /var/tmp/sess_039fec2a643340f118b6355e4c836ae8 -------------e- /var/tmp/sess_fa46fa80b26e6cf3d9c7de942d5dbcff -------------e- /var/tmp/cache_664858e614367812148716536e22d030 -------------e- /var/tmp/sess_4c8d4c44fbd828dc17415ce6aa213115 -------------e- /var/tmp/sess_d231a6c0e5dd4d7bacbf9de3d8bb298f -------------e- /var/tmp/sess_a82f8a088a8e37d375f6a9fede4a54d2 -------------e- /var/tmp/sess_604697227ae5359e5783dc9407845338 -------------e- /var/tmp/sess_5b4e623536640abe671b40563d03817d -------------e- /var/tmp/sess_2aba0aff64f3c18f22e0b79d591259e2 -------------e- /var/tmp/sess_bfd52a2d2d80880f8e26ad460739a0494f0d1e9e -------------e- /var/tmp/sess_ba9f3e3a7c7111930d6b801aaa833b46 -------------e- /var/tmp/sess_5cc8c5b620015a465359359a0805fbdd -------------e- /var/tmp/sess_84945c41d604b4653a1bf45d83a1917c -------------e- /var/tmp/sess_5f52569b27430780c07d25cfb8177e5c1ef647f0 -------------e- /var/tmp/sess_45896aef9e77f16be1b3e94b3edb2599 -------------e- /var/tmp/sess_5a67d0ef8f826a2f103b429c8464bdd5f75d6218 -------------e- /var/tmp/sess_1fce98bb32e5b34c79fd5a313de32980 -------------e- /var/tmp/sess_f7ea772ff3fbb1eb2ad8712dd2c49ed8 -------------e- /var/tmp/sess_a9dc16bc5c1eb2768bb2600f0d102fde -------------e- /var/tmp/mm.sem.3zwRTu -------------e- /var/tmp/sess_e2cad140703338a4b8c9254ec6b0a1a2 -------------e- /var/tmp/sess_e7c8e85daf9c5424aecb83e066decf31 -------------e- /var/tmp/sess_800f878fa944370f42e76057e7c033e19520bd41 -------------e- /var/tmp/sess_4fdae64eb18599521ace18679795568b -------------e- /var/tmp/sess_958fb886b97de2e767b059376c4724b5 -------------e- /var/tmp/sess_3c832a31f17744a8bb3c59dde02e561aefbc2e48 -------------e- /var/tmp/sess_6d9d7bf04f34e0d82b101f882196a905 -------------e- /var/tmp/sess_7231c75ae4fad2ca5fbcb6de430a7b13 -------------e- /var/tmp/sess_2eadffa2285def9673ce784395d272d8 -------------e- /var/tmp/cache_2ff353b664d8028df967f807ac18593a -------------e- /var/tmp/sess_4138a267f1f5e3ad93c1d64547c63134ae7c0db3 -------------e- /var/tmp/sess_64cd9fa0d6af8e8041aafffbe3db986a -------------e- /var/tmp/tmpg3ycIG -------------e- /var/tmp/cache_b633ac8283d6de8e39d81160d63fc8cd -------------e- /var/tmp/sess_2cee03cf5eafd3ef55d8efa1b0390436 -------------e- /var/tmp/sess_608066c609e28621f2a29ac04a3a6441 -------------e- /var/tmp/sess_46dfb35cf8266699ba9304e5d8c6869d -------------e- /var/tmp/sess_fb202a0ed54cee8832c5f6e0ca7fc1b3 -------------e- /var/tmp/sess_8fe3c5fd8cdda02855e5f9b5a1ea85a4 -------------e- /var/tmp/sess_941376d5cb51e0ba73f9a27ee259c159 -------------e- /var/tmp/sess_4fa17b1eac1d18341d20d0d8d4991ceb -------------e- /var/tmp/cache_de647c956ca6a1b75744ad194aceaa82 -------------e- /var/tmp/mm.sem.Ugu7Be -------------e- /var/tmp/sess_656e8a50759d5b36b963e7eb85e0bb0d -------------e- /var/tmp/sess_983f77b607bbffa1748d6c49557381e9 -------------e- /var/tmp/sess_632860d092e5e374da522ed2f88e83ce -------------e- /var/tmp/sess_030f900b81cc2a4ad095d53ef3ee0791 -------------e- /var/tmp/yum.log -------------e- /var/tmp/cache_810174993c6a2c0efe2edbe4c39a4a81 -------------e- /var/tmp/sess_29e2c781643434e81d189fc41f47fd34 -------------e- /var/tmp/tmpE12ahd -------------e- /var/tmp/sess_935da512fb077e04610266748b3b77f3 - cat /etc/fstab /tmp as: loop,rw,noexec,nosuid,nodev

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• Trouble with local id / remote id configuration of VPN

  - by Lynn Owens

  I have a NetGear UTM firewall and a Windows machine running NetGear's VPN client. The Windows machine I can put on the UTM network and take off of it. When I am cabled into the local (internal) the following configuration works: UTM: Local Id: Local Wan IP: (The UTM's WAN IP address) Remote Id: User FQDN: utm_remote1.com Client: Local Id: DNS: utm_remote1.com Remote Id: (The UTM's WAN IP address) Gateway authentication: preshared key Policy remote endpoint: FQDN: utm_remote1.com But when I'm off the UTM's internal local network and simply coming in from the internet, this does not work. It simply repeats SEND phase 1 before giving up. Since I know that the UTM WAN IP is accessible from both inside and outside the network, I figured the problem was with the Client local id. So, I tried the following: UTM: Local Id: Local Wan IP: (The UTM's WAN IP address) Remote Id: (A DN of a self-signed certificate I created for the client and uploaded into the UTM certificates) Client: Local Id: (The DN of the aforementioned self signed cert) Remote Id: (The UTM's WAN IP address) Gateway authentication: (the aforementioned self signed cert) Policy remote end point: ... er, ... my choices are IP and FQDN.... Not sure what to put here No matter what I've tried, it just keeps repeating the SEND phase 1. Any ideas?

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• What is wrong with my Watcher (incron-like) daemon?

  - by eric01

  I have installed Watcher this way: both watcher.py and watcher.ini are located in /etc I also installed pyinotify and it does work when I use python -m pyinotify -v /var/www However, I want to use the daemon and when I start watcher.py, I get weird lines on my watcher.log (see below). I also included my watcher.ini file. Note: I have the latest version of Python. The watcher.py can be found here What is wrong with what I did? Also, do I really need pyinotify? Thanks a lot for your help watcher.ini: [DEFAULT] logfile=/var/log/watcher.log pidfile=/var/run/watcher.pid [job1] watch=/var/www events=create,delete,modify recursive=true command=mkdir /home/mockfolder ## just using this as test watcher.log: 2012-09-22 04:28:23.822029 Daemon started 2012-09-22 04:28:23.822596 job1: /var/www Traceback (most recent call last): File "/etc/watcher.py", line 359, in <module> daemon.start() File "/etc/watcher.py", line 124, in start self.run() File "/etc/watcher.py", line 256, in run autoadd = self.config.getboolean(section,'autoadd') File "/usr/lib/python2.7/ConfigParser.py", line 368, in getboolean v = self.get(section, option) File "/usr/lib/python2.7/ConfigParser.py", line 618, in get raise NoOptionError(option, section) ConfigParser.NoOptionError: No option 'autoadd' in section: 'job1'

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• Trying to install datastax opscenter - Failed to load application: cannot import name _parse

  - by gansbrest

  I'm not familiar with python, maybe someone could explain what's going on here? ec2-user@prod-opscenter-01:~ % java -version java version "1.7.0_45" Java(TM) SE Runtime Environment (build 1.7.0_45-b18) Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode) ec2-user@prod-opscenter-01:~ % python -V Python 2.6.8 ec2-user@prod-opscenter-01:~ % openssl version OpenSSL 1.0.1e-fips 11 Feb 2013 And now the error ec2-user@prod-opscenter-01:~ % sudo /etc/init.d/opscenterd start Starting Cassandra cluster manager opscenterd Starting opscenterdUnhandled Error Traceback (most recent call last): File "/usr/lib64/python2.6/site-packages/twisted/application/app.py", line 652, in run runApp(config) File "/usr/lib64/python2.6/site-packages/twisted/scripts/twistd.py", line 23, in runApp _SomeApplicationRunner(config).run() File "/usr/lib64/python2.6/site-packages/twisted/application/app.py", line 386, in run self.application = self.createOrGetApplication() File "/usr/lib64/python2.6/site-packages/twisted/application/app.py", line 451, in createOrGetApplication application = getApplication(self.config, passphrase) --- <exception caught here> --- File "/usr/lib64/python2.6/site-packages/twisted/application/app.py", line 462, in getApplication application = service.loadApplication(filename, style, passphrase) File "/usr/lib64/python2.6/site-packages/twisted/application/service.py", line 405, in loadApplication application = sob.loadValueFromFile(filename, 'application', passphrase) File "/usr/lib64/python2.6/site-packages/twisted/persisted/sob.py", line 210, in loadValueFromFile exec fileObj in d, d File "bin/start_opscenter.py", line 1, in <module> from opscenterd import opscenterd_tap File "/usr/lib/python2.6/site-packages/opscenterd/opscenterd_tap.py", line 37, in <module> File "/usr/lib/python2.6/site-packages/opscenterd/OpsCenterdService.py", line 13, in <module> File "/usr/lib/python2.6/site-packages/opscenterd/ClusterServices.py", line 22, in <module> File "/usr/lib/python2.6/site-packages/opscenterd/WebServer.py", line 40, in <module> File "/usr/lib/python2.6/site-packages/opscenterd/Agents.py", line 18, in <module> exceptions.ImportError: cannot import name _parse Failed to load application: cannot import name _parse Maybe there are open source alternatives to monitoring cassandra I should look at? Thanks a lot

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• Is there a way to have "default" or "placeholder" values in Excel?

  - by Iszi

  I've got a spreadsheet with cells that I want to be user-editable, but that I also want to have "default" or "placeholder" values in, whenever there is no user-entered data. There's a couple good use cases for this: Prevent formula errors, while providing reasonable assumptions when a user has not entered (or has deleted) their own value. I could use conditional formatting to alert the user to default values, so as to prevent their ignorance of them - they can then make an informed choice as to whether that value is still appropriate or not for the intended calculations. Give a short description of what is intended to be entered in the cell, without having to have a separate "instructions" segment or document. This would also eliminate the need for a nearby "Label" cell, in some cases where it's really not appropriate. To accomplish what I want, I need some formula, script, or other advanced spreadsheet option that will do the following: Show the default value in the cell before user enters data. Allow the default value to be found by any formulas referencing the cell, when there is no user-entered data in that cell. Allow the user to freely (naturally, exactly as they would do with any "normal" cell) overwrite the displayed value with their own value or formula, and have the user-entered data found by any formulas referencing the cell. When cell is blanked by deletion of user input, revert to default value. Is there a way to do this in Excel, or am I asking too much of a spreadsheet program here?

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• NSFetchedResultsController crashing on performFetch: when using a cache

  - by Oliver

  I make use of NSFetchedResultsController to display a bunch of objects, which are sectioned using dates. On a fresh install, it all works perfectly and the objects are displayed in the table view. However, it seems that when the app is relaunched I get a crash. I specify a cache when initialising the NSFetchedResultsController, and when I don't it works perfectly. Here is how I create my NSFetchedResultsController: - (NSFetchedResultsController *)results { // If we are not nil, stop here if (results != nil) return results; // Create the fetch request, entity and sort descriptors NSFetchRequest *fetch = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Event" inManagedObjectContext:self.managedObjectContext]; NSSortDescriptor *descriptor = [[NSSortDescriptor alloc] initWithKey:@"utc_start" ascending:YES]; NSArray *descriptors = [[NSArray alloc] initWithObjects:descriptor, nil]; // Set properties on the fetch [fetch setEntity:entity]; [fetch setSortDescriptors:descriptors]; // Create a fresh fetched results controller NSFetchedResultsController *fetched = [[NSFetchedResultsController alloc] initWithFetchRequest:fetch managedObjectContext:self.managedObjectContext sectionNameKeyPath:@"day" cacheName:@"Events"]; fetched.delegate = self; self.results = fetched; // Release objects and return our controller [fetched release]; [fetch release]; [descriptor release]; [descriptors release]; return results; } These are the messages I get when the app crashes: FATAL ERROR: The persistent cache of section information does not match the current configuration. You have illegally mutated the NSFetchedResultsController's fetch request, its predicate, or its sort descriptor without either disabling caching or using +deleteCacheWithName: *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'FATAL ERROR: The persistent cache of section information does not match the current configuration. You have illegally mutated the NSFetchedResultsController's fetch request, its predicate, or its sort descriptor without either disabling caching or using +deleteCacheWithName:' I really have no clue as to why it's saying that, as I don't believe I'm doing anything special that would cause this. The only potential issue is the section header (day), which I construct like this when creating a new object: // Set the new format [formatter setDateFormat:@"dd MMMM"]; // Set the day of the event [event setValue:[formatter stringFromDate:[event valueForKey:@"utc_start"]] forKey:@"day"]; Like I mentioned, all of this works fine if there is no cache involved. Any help appreciated!

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• Core Data migration failing with error: Failed to save new store after first pass of migration

  - by unforgiven

  In the past I had already implemented successfully automatic migration from version 1 of my data model to version 2. Now, using SDK 3.1.3, migrating from version 2 to version 3 fails with the following error: Unresolved error Error Domain=NSCocoaErrorDomain Code=134110 UserInfo=0x5363360 "Operation could not be completed. (Cocoa error 134110.)", { NSUnderlyingError = Error Domain=NSCocoaErrorDomain Code=256 UserInfo=0x53622b0 "Operation could not be completed. (Cocoa error 256.)"; reason = "Failed to save new store after first pass of migration."; } I have tried automatic migration using NSMigratePersistentStoresAutomaticallyOption and NSInferMappingModelAutomaticallyOption and also migration using only NSMigratePersistentStoresAutomaticallyOption, providing a mapping model from v2 to v3. I see the above error logged, and no object is available in the application. However, if I quit the application and reopen it, everything is in place and working. The Core Data methods I am using are the following ones - (NSManagedObjectModel *)managedObjectModel { if (managedObjectModel != nil) { return managedObjectModel; } NSString *path = [[NSBundle mainBundle] pathForResource:@"MYAPP" ofType:@"momd"]; NSURL *momURL = [NSURL fileURLWithPath:path]; managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:momURL]; return managedObjectModel; } - (NSManagedObjectContext *) managedObjectContext { if (managedObjectContext != nil) { return managedObjectContext; } NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator]; if (coordinator != nil) { managedObjectContext = [[NSManagedObjectContext alloc] init]; [managedObjectContext setPersistentStoreCoordinator: coordinator]; } return managedObjectContext; } - (NSPersistentStoreCoordinator *)persistentStoreCoordinator { if (persistentStoreCoordinator != nil) { return persistentStoreCoordinator; } NSURL *storeUrl = [NSURL fileURLWithPath: [[self applicationDocumentsDirectory] stringByAppendingPathComponent: @"MYAPP.sqlite"]]; NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption, [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil]; NSError *error = nil; persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: [self managedObjectModel]]; if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl options:options error:&error]) { // Handle error NSLog(@"Unresolved error %@, %@", error, [error userInfo]); } return persistentStoreCoordinator; } In the simulator, I see that this generates a MYAPP~.sqlite files and a MYAPP.sqlite file. I tried to remove the MYAPP~.sqlite file, but BOOL oldExists = [[NSFileManager defaultManager] fileExistsAtPath: [[self applicationDocumentsDirectory] stringByAppendingPathComponent: @"MYAPP~.sqlite"]]; always returns NO. Any clue? Am I doing something wrong? Thank you in advance.

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• Pinch gesture in QLPreviewController?

  - by Arne

  I am using the QLPreviewController in my project, but cannot use pinch gestures to zoom in. What do I need to set up first? This is how I create the view controller: - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { QLPreviewController *previewer = [[QLPreviewController alloc] init]; [previewer setDataSource:self]; [previewer setCurrentPreviewItemIndex:indexPath.row]; [[self navigationController] pushViewController:previewer animated:YES]; }

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• iPhone OS 3.2 - How to register for notifcations that may not be available

  - by cdstamper

  So I'm trying to register for the MPMoviePlayerDidExitFullscreenNotification notification in my universal app (iPhone and iPad). Problem is, OS 3.1.3 doesn't support this notification, and just crashes. I've tried version checking, like so: if ([MPMoviePlayerController instancesRespondToSelector:@selector(setShouldAutoplay:)]) {//Check for shouldSetAutoplay, this ensures that we are running at least 3.2 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playerDidFinish:) name:(NSString*)class2 object:[self player]]; Doesn't work, still crashes. How do I do this?

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• How to be a verified publisher ?

  - by Frank

  I wrote an app and I want to sell it online, so I uploaded it to my website and tried to download and run it as a test, but a window appeared, it said : "The publisher could not be verified. Are you sure you want to run this software ?", and it also said : "Publisher : Unknown Publisher". It's actually a self-signed Java jar file wrapped into an exe file, I self-signed it with Netbeans6.7. I wonder what should I do to be a "known" publisher ? Frank

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