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  • Adding a dynamic-height UITableView into a scrolling view?

    - by Greg
    Hello all – I'm getting into iPhone development and have hit my first confusing UI point. Here's the situation: My app is tab-based, and the view that I'm confused about has a static featured content image at the top, then a dynamic list below into which X headlines are loaded. My goal is to have the height of the headline table grow as elements are added to it, and then to have the whole view scroll (both featured image on top and headline list below). So, I guess my question comes in two parts: 1) First, how do you set up a dynamic-height table view that will grow as cells are added to it. So far I've only been able to have my tables handle their own scrolling. 2) Then, what is the root NIB view that the featured image and the table should live in to enabled scrolling? I've dropped oversized content into a UIScrollView now, although did seem to have any success with having it automatically scroll. Thanks in advance for any help on this subject!

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  • Network Connection NSNotification for OSX?

    - by Andrew
    I simply need to have a notification post when a valid IP address is assigned. I have tried polling via SCReachability, but that seems to be inefficient. Any suggestions? This seems like it should be simple, but I've been struggling for several hours to get anything working.

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  • CATransitionFade not working on newly added subviews

    - by David Liu
    For some reason, fading in new buttons using CATransition isn't working for me when it's a newly added button. The fade animation, however, is working on existing subviews. Code: // Add new button. CATransition *animation = [CATransition animation]; [animation setDuration:0.5]; [animation setType:kCATransitionFade]; [[button layer] addAnimation:animation forKey:@"fadeIn"]; [self.view addSubview:button]; // Enable previous button (Enabling fades in different type of background) if(toolbar.buttons.count != 0){ UIButton * prevButton = [toolbar.buttons objectAtIndex:(toolbar.buttons.count - 1)]; prevButton.enabled = YES; [[prevButton layer] addAnimation:animation forKey:@"fadeIn"]; }

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  • NSNumber >= 13 won't retain. Everything else will.

    - by jkap
    The code I'm currently working on requires adding an NSNumber object to an array. All of the NSNumbers with value 0-12 are added fine, but 13 onward causes a EXC_BAD_ACCESS. I turned on NSZombieEnabled and am now getting *** -[CFNumber retain]: message sent to deallocated instance 0x3c78420. Here's the call stack: #0 0x01eac3a7 in ___forwarding___ #1 0x01e886c2 in __forwarding_prep_0___ #2 0x01e3f988 in CFRetain #3 0x01e4b586 in _CFArrayReplaceValues #4 0x0002a2f9 in -[NSCFArray insertObject:atIndex:] #5 0x0002a274 in -[NSCFArray addObject:] #6 0x00010a3b in -[Faves addObject:] at Faves.m:24 #7 0x000062ff in -[ShowController processFave] at ShowController.m:458 #8 0x002af405 in -[UIApplication sendAction:to:from:forEvent:] #9 0x00312b4e in -[UIControl sendAction:to:forEvent:] #10 0x00314d6f in -[UIControl(Internal) _sendActionsForEvents:withEvent:] #11 0x00313abb in -[UIControl touchesEnded:withEvent:] #12 0x002c8ddf in -[UIWindow _sendTouchesForEvent:] #13 0x002b27c8 in -[UIApplication sendEvent:] #14 0x002b9061 in _UIApplicationHandleEvent #15 0x02566d59 in PurpleEventCallback #16 0x01e83b80 in CFRunLoopRunSpecific #17 0x01e82c48 in CFRunLoopRunInMode #18 0x02565615 in GSEventRunModal #19 0x025656da in GSEventRun #20 0x002b9faf in UIApplicationMain #21 0x00002498 in main at main.m:14 If it wasn't isolated to NSNumbers of a certain range, I'd assume I screwed something up with my memory management, but I've just got no idea. Any ideas? Thanks, Josh

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  • Problem with XML parser

    - by zp26
    Hi, I have a problem with parsing XML. I have created a program which write a file xml in the project directory. The file XML are correct. (i checked). When i try to read this XML the program crash and return 1 status. I have controlled my 2 path and they are equals. Can you help me please? Thanks so much. #import "PositionIdentifierViewController.h" #import "WriterXML.h" @implementation PositionIdentifierViewController - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { NSString *stringa = [NSString stringWithFormat:@"%@",string]; textArea.text = [textArea.text stringByAppendingString:@"\n"]; textArea.text = [textArea.text stringByAppendingString:stringa]; } -(IBAction)startParsing { NSURL *xmlURL = [NSURL fileURLWithPath:path]; NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL]; [parser setDelegate:self]; BOOL success = [parser parse]; if(success == YES){ // } [parser release]; } // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; NSArray *tempPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectoryPath = [tempPaths objectAtIndex:0]; path = [documentsDirectoryPath stringByAppendingPathComponent:@"filePosizioni.xml"]; WriterXML *newWriter; newWriter = [[WriterXML alloc]init]; [newWriter saveXML:(NSString*)@"ciao":(float)10:(float)40:(float)70]; [newWriter saveXML:(NSString*)@"pippo":(float)20:(float)50:(float)80]; [newWriter saveXML:(NSString*)@"pluto":(float)30:(float)60:(float)90]; NSLog(path); } - (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 { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [super dealloc]; } @end #import "WriterXML.h" @implementation WriterXML -(void)saveXML:(NSString*)name:(float)x:(float)y:(float)z{ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectoryPath = [paths objectAtIndex:0]; NSString *filePath = [documentsDirectoryPath stringByAppendingPathComponent:@"filePosizioni.xml"]; NSFileHandle *myHandle; NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *titoloXML = [NSString stringWithFormat:@"<?xml version=1.0 encoding=UTF-8 ?>"]; NSString *inizioTag = [NSString stringWithFormat:@"\n\n\n<position>"]; NSString *tagName = [NSString stringWithFormat:@"\n <name>%@</name>", name]; NSString *tagX = [NSString stringWithFormat:@"\n <x>%f</x>", x]; NSString *tagY = [NSString stringWithFormat:@"\n <y>%f</y>", y]; NSString *tagZ = [NSString stringWithFormat:@"\n <z>%f</z>", z]; NSString *fineTag= [NSString stringWithFormat:@"\n</position>"]; NSData* dataTitoloXML = [titoloXML dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataInizioTag = [inizioTag dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataName = [tagName dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataX = [tagX dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataY = [tagY dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataZ = [tagZ dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataFineTag = [fineTag dataUsingEncoding: NSASCIIStringEncoding]; if(![fileManager fileExistsAtPath:filePath]) [fileManager createFileAtPath:filePath contents:dataTitoloXML attributes:nil]; myHandle = [NSFileHandle fileHandleForUpdatingAtPath:filePath]; [myHandle seekToEndOfFile]; [myHandle writeData:dataInizioTag]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataName]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataX]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataY]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataZ]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataFineTag]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; NSLog(@"zp26 %@",filePath); } @end

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  • UITableView gives empty table, does not load data

    - by Alex L
    Hi, Everything works fine when the view that holds my table is the main (first) view. However, when it's not the first view and I switch into that view, my table does not load data and I get an empty table. Using NSLog I can tell that the program is not invoking numberOfRowsInSection and cellForRowAtIndexPath. I have <UITableViewDataSource, UITableViewDelegate>, IBOutlet UITableview *tableView all declared. They are also connected in the InterfaceBuilder. I tried using viewWillAppear and [tableView reloadData] but that did not help. I'm new to iPhone development and your help is appreciated!

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  • How do I determine which control fired an event?

    - by Daniel I-S
    I have the Value Changed event of two UISliders (both of which have referencing outlets) wired up to the following method: -(IBAction) sliderMoved:(id) sender {} How can I determine which slider was moved so that I can get its value and update the corresponding label? Or would it be simpler to have two separate events, one for each slider? The second option seems like unnecessary replication to me. Cheers, Dan

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  • Another IKImageView Question: copying a region

    - by Brian Postow
    I'm trying to use the select and copy feature of the IKImageView. If all you want to do is have an app with an image, select a portion and copy it to the clipboard, it's easy. You set the copy menu pick to the first responder's copy:(id) method and magically everything works. However, if you want something more complicated, like you want to copy as part of some other operation, I can't seem to find the method to do this. IKImageView doesn't seem to have a copy method, it doesn't seem to have a method that will even tell you the selected rectangle! I have gone through Hillegass' book, so I understand how the clipboard works, just not how to get the portion of the image out of the view... Now, I'm starting to think that I made a mistake in basing my project on IKImageView, but it's what Preview is built on (or so I've read), so I figured it had to be stable... and anyway, now it's too late, I'm too deep in this to start over... So, other than not using IKImageView, any suggestions on how to copy the select region to the clipboard manually? EDIT actually, I have found the copy(id) method, but when I call it, I get <Error>: CGBitmapContextCreate: unsupported parameter combination: 8 integer bits/component; 16 bits/pixel; 1-component color space; kCGImageAlphaPremultipliedLast; 2624 bytes/row. Which obviously doesn't happen when I do a normal copy through the first-responder... I understand the error message, but I'm not sure where it's getting those parameters from... Is there any way to trace through this and see how this is happening? A debugger won't help for obvious reasons, as well as the fact that I'm doing this in Mozilla, so a debugger isn't an option anyway... EDIT 2 It occurs to me that the copy:(id) method I found may be copying the VIEW rather than copying a chunk of the image to the clipboard, which is what I need. The reason I thought it was the clipboard copy is that in another project, where I'm copying from an IKImageView to the clipboard straight from the edit menu, it just sends a copy:(id) to the firstResponder, but I'm not actually sure what the firstresponder does with it...

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  • Ask for an example code for parsing xml and get attributes by using GData API

    - by ben
    When i use GData API in my app for parsing xml,how could i get attributes and it's value? Wanted a piece of example code.Thanks a lot. xml: <playurls><url islive="0" type="3" bit_stream="1">http://vods.netitv.com//dy2/2010/02/08/cf584b76-3579-4b75-a0c8-f7a473d79f8c.mp4 </url><url islive="0" type="3" bit_stream="2">http://vods.netitv.com//dy/2010/02/08/965bbc65-8ec0-4c50-98ae-c69a831926cc.mp4 </url><url islive="0" type="2" bit_stream="1">http://vods.netitv.com//dy2/2010/02/08/cf584b76-3579-4b75-a0c8-f7a473d79f8c.mp4 </url><url islive="0" type="2" bit_stream="2">http://vods.netitv.com//dy/2010/02/08/965bbc65-8ec0-4c50-98ae-c69a831926cc.mp4 </url></playurls>

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  • How to show/open/bringToFront a Window that is inside the MainMenu.xib File?

    - by 0SX
    This is a stupid question that I should be able to answer myself but I can't seem to get it to work. I have a window inside my MainMenu.xib file that I want to show or bring to front. Right now I have it visible at launch and it works but if I close it with orderOut: and do another instance of it, buttons quit working. How can I reopen the same window that the NSApplication launched at the beginning of the app? I've spent 2+ days trying to figure a way to make it work but no luck. I've even tried to split the window out to it's own xib file but when I do that my methods from the appDelegate fail to respond/work. Any help would be much appreciated. I feel stupid for even asking such a simplistic question. lol Thanks.

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  • UIAlertView with subview animating to new view crashes app

    - by William
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Congratulations" message:message delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"View", nil]; UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(110, 100, 80, 80)]; NSString *imagePath = [NSString stringWithFormat:@"%@", [Array objectAtIndex:x]]; UIImage *bkgImg = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:imagePath ofType:@"png"]]; imageView.image = bkgImg; [bkgImg release]; [alert addSubview:imageView]; [imageView release]; [alert show]; [alert release]; That is the code that I am using to create the alert view. Currently, I have it set up so if the user presses one of the buttons, it will load up a new viewcontroller. It worked fine until I added a subview to the UIAlertView. Now, whenever it animates to the new screen, it just crashes the program. I am fairly new to iPhone development and any help would be appreciated.

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  • How do I implement AABB ray cast hit checking for opengl es on the iPhone

    - by Big Fizzy
    Basically, I draw a 3D cube, I can spin it around but I want to be able to touch it and know where on my cube's surface the user touched. I'm using for setting up, generating and spinning. Its based on the Molecules code and NeHe tutorial #5. Any help, links, tutorials and code would be greatly appreciated. I have lots of development experience but nothing much in the way of openGL and 3d. // // GLViewController.h // NeHe Lesson 05 // // Created by Jeff LaMarche on 12/12/08. // Copyright Jeff LaMarche Consulting 2008. All rights reserved. // #import "GLViewController.h" #import "GLView.h" @implementation GLViewController - (void)drawBox { static const GLfloat cubeVertices[] = { -1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,-1.0f, 1.0f, -1.0f,-1.0f, 1.0f, -1.0f, 1.0f,-1.0f, 1.0f, 1.0f,-1.0f, 1.0f,-1.0f,-1.0f, -1.0f,-1.0f,-1.0f }; static const GLubyte cubeNumberOfIndices = 36; const GLubyte cubeVertexFaces[] = { 0, 1, 5, // Half of top face 0, 5, 4, // Other half of top face 4, 6, 5, // Half of front face 4, 6, 7, // Other half of front face 0, 1, 2, // Half of back face 0, 3, 2, // Other half of back face 1, 2, 5, // Half of right face 2, 5, 6, // Other half of right face 0, 3, 4, // Half of left face 7, 4, 3, // Other half of left face 3, 6, 2, // Half of bottom face 6, 7, 3, // Other half of bottom face }; const GLubyte cubeFaceColors[] = { 0, 255, 0, 255, 255, 125, 0, 255, 255, 0, 0, 255, 255, 255, 0, 255, 0, 0, 255, 255, 255, 0, 255, 255 }; glEnableClientState(GL_VERTEX_ARRAY); glVertexPointer(3, GL_FLOAT, 0, cubeVertices); int colorIndex = 0; for(int i = 0; i < cubeNumberOfIndices; i += 3) { glColor4ub(cubeFaceColors[colorIndex], cubeFaceColors[colorIndex+1], cubeFaceColors[colorIndex+2], cubeFaceColors[colorIndex+3]); int face = (i / 3.0); if (face%2 != 0.0) colorIndex+=4; glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_BYTE, &cubeVertexFaces[i]); } glDisableClientState(GL_VERTEX_ARRAY); } //move this to a data model later! - (GLfixed)floatToFixed:(GLfloat)aValue; { return (GLfixed) (aValue * 65536.0f); } - (void)drawViewByRotatingAroundX:(float)xRotation rotatingAroundY:(float)yRotation scaling:(float)scaleFactor translationInX:(float)xTranslation translationInY:(float)yTranslation view:(GLView*)view; { glMatrixMode(GL_MODELVIEW); GLfixed currentModelViewMatrix[16] = { 45146, 47441, 2485, 0, -25149, 26775,-54274, 0, -40303, 36435, 36650, 0, 0, 0, 0, 65536 }; /* GLfixed currentModelViewMatrix[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65536 }; */ //glLoadIdentity(); //glOrthof(-1.0f, 1.0f, -1.5f, 1.5f, -10.0f, 4.0f); // Reset rotation system if (isFirstDrawing) { //glLoadIdentity(); glMultMatrixx(currentModelViewMatrix); [self configureLighting]; isFirstDrawing = NO; } // Scale the view to fit current multitouch scaling GLfixed fixedPointScaleFactor = [self floatToFixed:scaleFactor]; glScalex(fixedPointScaleFactor, fixedPointScaleFactor, fixedPointScaleFactor); // Perform incremental rotation based on current angles in X and Y glGetFixedv(GL_MODELVIEW_MATRIX, currentModelViewMatrix); GLfloat totalRotation = sqrt(xRotation*xRotation + yRotation*yRotation); glRotatex([self floatToFixed:totalRotation], (GLfixed)((xRotation/totalRotation) * (GLfloat)currentModelViewMatrix[1] + (yRotation/totalRotation) * (GLfloat)currentModelViewMatrix[0]), (GLfixed)((xRotation/totalRotation) * (GLfloat)currentModelViewMatrix[5] + (yRotation/totalRotation) * (GLfloat)currentModelViewMatrix[4]), (GLfixed)((xRotation/totalRotation) * (GLfloat)currentModelViewMatrix[9] + (yRotation/totalRotation) * (GLfloat)currentModelViewMatrix[8]) ); // Translate the model by the accumulated amount glGetFixedv(GL_MODELVIEW_MATRIX, currentModelViewMatrix); float currentScaleFactor = sqrt(pow((GLfloat)currentModelViewMatrix[0] / 65536.0f, 2.0f) + pow((GLfloat)currentModelViewMatrix[1] / 65536.0f, 2.0f) + pow((GLfloat)currentModelViewMatrix[2] / 65536.0f, 2.0f)); xTranslation = xTranslation / (currentScaleFactor * currentScaleFactor); yTranslation = yTranslation / (currentScaleFactor * currentScaleFactor); // Grab the current model matrix, and use the (0,4,8) components to figure the eye's X axis in the model coordinate system, translate along that glTranslatef(xTranslation * (GLfloat)currentModelViewMatrix[0] / 65536.0f, xTranslation * (GLfloat)currentModelViewMatrix[4] / 65536.0f, xTranslation * (GLfloat)currentModelViewMatrix[8] / 65536.0f); // Grab the current model matrix, and use the (1,5,9) components to figure the eye's Y axis in the model coordinate system, translate along that glTranslatef(yTranslation * (GLfloat)currentModelViewMatrix[1] / 65536.0f, yTranslation * (GLfloat)currentModelViewMatrix[5] / 65536.0f, yTranslation * (GLfloat)currentModelViewMatrix[9] / 65536.0f); // Black background, with depth buffer enabled glClearColor(0.0f, 0.0f, 0.0f, 1.0f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); [self drawBox]; } - (void)configureLighting; { const GLfixed lightAmbient[] = {13107, 13107, 13107, 65535}; const GLfixed lightDiffuse[] = {65535, 65535, 65535, 65535}; const GLfixed matAmbient[] = {65535, 65535, 65535, 65535}; const GLfixed matDiffuse[] = {65535, 65535, 65535, 65535}; const GLfixed lightPosition[] = {30535, -30535, 0, 0}; const GLfixed lightShininess = 20; glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glEnable(GL_COLOR_MATERIAL); glMaterialxv(GL_FRONT_AND_BACK, GL_AMBIENT, matAmbient); glMaterialxv(GL_FRONT_AND_BACK, GL_DIFFUSE, matDiffuse); glMaterialx(GL_FRONT_AND_BACK, GL_SHININESS, lightShininess); glLightxv(GL_LIGHT0, GL_AMBIENT, lightAmbient); glLightxv(GL_LIGHT0, GL_DIFFUSE, lightDiffuse); glLightxv(GL_LIGHT0, GL_POSITION, lightPosition); glEnable(GL_DEPTH_TEST); glShadeModel(GL_SMOOTH); glEnable(GL_NORMALIZE); } -(void)setupView:(GLView*)view { const GLfloat zNear = 0.1, zFar = 1000.0, fieldOfView = 60.0; GLfloat size; glMatrixMode(GL_PROJECTION); glEnable(GL_DEPTH_TEST); size = zNear * tanf(DEGREES_TO_RADIANS(fieldOfView) / 2.0); CGRect rect = view.bounds; glFrustumf(-size, size, -size / (rect.size.width / rect.size.height), size / (rect.size.width / rect.size.height), zNear, zFar); glViewport(0, 0, rect.size.width, rect.size.height); glScissor(0, 0, rect.size.width, rect.size.height); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glClearColor(0.0f, 0.0f, 0.0f, 1.0f); glTranslatef(0.0f, 0.0f, -6.0f); isFirstDrawing = YES; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } - (void)dealloc { [super dealloc]; } @end

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  • Location of the object after scrolling in UIScrollView

    - by ludo
    Hi, I have a scrollView (width:320px height:100px) on my UIView, inside it I add 10 images with width:106.5px each. After that I use this function to have 3 different parts inside my scrollView, so everytime I scroll, an image will automatically be center. -(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate { [self returnToPosition:self.scrollView]; } -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { [self returnToPosition:self.scrollView]; } -(void)returnToPosition:(UIScrollView *)scrollView { CGFloat itemWidth = 106.5f; CGFloat position = [self.scrollView contentOffset].x; CGFloat newPosition = 0.0f; CGFloat offSet = position / itemWidth; NSUInteger target = (NSUInteger)(offSet + 0.5f); newPosition = target * itemWidth; [self.scrollView setContentOffset:CGPointMake(newPosition, 0.0f) animated:YES]; } Here is my question, I want to be able to know which image will be in the middle position after the user scroll the View, because I want to display on my UIView a text, specific to that image. But I don't know how to do that. Some Ideas?

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  • iPhone Dev: Animating PNG Sequences

    - by Franky
    What is the best or recommended technique for animating PNG Sequences. Heres what I've learned: Do it Manually Using MutableArrays containing Strings, you can animate a UIImageView with a timer which increments an index number UIImage - animation methods This works, the only problem is to find if an image has completed its animation, you have to check the isAnimating BOOL, and to do that you need a timer. What is the best and recommended? Looking to do Oldschool game sprite animations, ie: Idle Animation Attack Animation Walk Animation ect... Let me know if any one has something. @lessfame

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  • Address Book callback not called

    - by Oliver
    I have an iPhone app that makes use of the AddressBook.framework and uses Core Data to store these contacts. In order to make sure I update my own database when the Address Book is updated (whether via MobileMe or editing within my own app), I am subscribing to the notification as to when the Address Book is updating. I call this on startup: ABAddressBookRef book = ABAddressBookCreate(); ABAddressBookRegisterExternalChangeCallback(book, addressBookChanged, self); Which (supposedly) calls this on any editing. I have an ABPersonViewController which allows editing, and addressBookChanged never seems to get called. void addressBookChanged(ABAddressBookRef reference, CFDictionaryRef dictionary, void *context) { // The contacts controller we need to call ContactsController *contacts = (ContactsController *)context; // Sync with the Address Book [contacts synchronizeWithAddressBook:reference]; } Is there any reason for it to not be called?

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  • Quartz 2D's drawing text and NSTimer in custom method

    - by coure06
    i want to show text using quartz 2d. Text will be drawing randomly on different position after each 1 seconds. I am not sure how i can use NSTimer with quartz 2D text. I can draw text in drawRect method where graphics context is already available. How i will draw text using my custom method myDraw which will be called after 1 second using NSTimer? If i create my custom Method the graphics context is not available in that method.

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  • Parent class issue - UITableViewController doesn't work

    - by Darko Hebrang
    When I access my Search View from my tab bar, the view gets loaded when SearchViewController interface is set like this: @interface SearchViewController : UIViewController but it crashes when I set it like this (although it doesn't crash when it is not accessed through the tab bar): @interface SearchViewController : UITableViewController Why? I need the UITableViewController as I have a table view that I access from the tab bar.

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  • Layering Cocoa WebView - Drawing on top?

    - by Josh
    http://stackoverflow.com/questions/1618498/webview-in-core-animation-layer The only other thread I can find is the above which doesn't necessarily fit my needs. Is there a reliable way to simply draw a view on top of a webview? I've tried to layer a regular NSView on top of WebView, and it draws right at first, but any movement in the webview (scrolling the page etc) appears to invalidate the view and produces visual artifacts. I've tried: [[[NSApp mainWindow] contentView] addSubview:view positioned:NSWindowAbove relativeTo:webView]; No luck there, same problems -- z-ordering doesn't seem to work unless I'm missing something. Is this just a limitation of webviews? I also tried implementing the view above as a window, which worked much better (just controlled the location of the window programmatically). However, the desired behavior is for the user to enter some text into this window, but for it not to steal "focus" -- ie the main window goes inactive (the x - + go gray) when the user clicks on the text field in the new window. Any way to avoid that? I've tried subclassing NSWindow and overriding canBecomeKey (return YES) and canBecomeMain (return NO) but the window still steals focus. Josh

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  • How to paint background of specific range of text in NSTextView

    - by Rui Pacheco
    Hi, This is not a specific bug, its more about not knowing how to do something. I've an NSTextView and I need to paint the background of specific ranges of text when the user clicks on a specific part of the text view. I've tried this but I just get erratic behaviour in the sense that sometimes text loses the foreground color or the background doesn't span the whole range: NSLayoutManager *layoutManager = [myTextView layoutManager]; [layoutManager removeTemporaryAttribute:NSBackgroundColorAttributeName forCharacterRange:range]; [[myTextView layoutManager] setTemporaryAttributes:attributes forCharacterRange:range]; For the sake of simplicity assume that range is always a valid string (it is in my testing environment).

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  • Xcode acting strange

    - by Moshe
    I am typing code from Head First iPhone Development (O'reilly) and Xcode will build and run fine once and then, without any modification to the code, the second build will fail. Why?(I'm using command+R)

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  • Detecting UITableView scrolling

    - by Xeph
    Hi I've subclassed UITableView (as KRTableView) and implemented the four touch-based methods (touchesBegan, touchesEnded, touchesMoved, and touchesCancelled) so that I can detect when a touch-based event is being handled on a UITableView. Essentially what I need to detect is when the UITableView is scrolling up or down. However, subclassing UITableView and creating the above methods only detects when scrolling or finger movement is occuring within a UITableViewCell, not on the entire UITableView. As soon as my finger is moved onto the next cell, the touch events don't do anything. This is how I'm subclassing UITableView: #import "KRTableView.h" @implementation KRTableView - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesBegan:touches withEvent:event]; NSLog(@"touches began..."); } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesMoved:touches withEvent:event]; NSLog(@"touchesMoved occured"); } - (void)touchesCancelled:(NSSet*)touches withEvent:(UIEvent *)event { [super touchesCancelled:touches withEvent:event]; NSLog(@"touchesCancelled occured"); } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesEnded:touches withEvent:event]; NSLog(@"A tap was detected on KRTableView"); } @end How can I detect when the UITableView is scrolling up or down?

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