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  • Core Location question....

    - by Moshe
    This tutorial on mobileorchard.com uses 2 classes (or 2 sets of .h and .m) to implement core location. Can I just use everything there in my existing class? How would I do that? Also, is the - (id) init { self = [super init]; if (self != nil) { self.locationManager = [[[CLLocationManager alloc] init] autorelease]; self.locationManager.delegate = self; // send loc updates to myself } return self; } method the same as the usual initWithNib? I;m trying to quickly implement something based on location information. As much help describing the above linked tutorial would be helpful. Thanks. No - really, Thank You.

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  • Faking a dynamic schema in Core Data?

    - by Gouldsc
    From reading the Apple Docs on Core Data, I've learned that you should not use Core Data when you need a dynamic schema. If I wanted to provide the user the ability to create their own properties, in a core data model would it work if I created some "dummy" attributes like "custom decimal 1", "custom decimal 2", "custom text 1", "custom text 2" etc that the user could name and use for their own purposes? Obviously this won't work for relationships, but for simple properties it seems like a reasonable workaround. Will creating a bunch of dummy attributes on my entities that go unused by most users noticeably decrease performance for them? Have any of you tried something like this? Thanks!

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  • Cut and paste out of/ into text fields in a separate window doesn't work

    - by Brian Postow
    I have a Macintosh Mozilla plugin which puts up a separate window for login information. It seems to work fine, it gets keyboard events like typing and hitting return to hit the default button. HOWEVER, it doesn't seem to get cut and paste events. When I hit Cmd-v, the edit menu flashes, but nothing happnes. Is this a problem with my responder chain? Do I have to specially tell Mozilla that I want these events? or am I likely to have some other problem that I haven't even thought of? thanks.

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  • Adding two NSDate

    - by niklassaers
    Hi guys, I've got two NSDate, date and time. I'd like to add them in such a manner that I get the date from date and time from time. Any suggestions on how I do this? Cheers Nik

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  • Get CoreLocation Update before TableView population?

    - by Clemens
    hi, i have the corelocation stuff in an uitableview controller. i actually want to get a distance from two locations and print that distance in a tableview cell. the problem is, that the tableview is filled before all the corelocation stuff happens. how can i make corelocation makes all updates before the table is filled? heres my class: // // EntriesListViewController.m // OEAW_App // // Created by Clemens on 6/6/10. // Copyright 2010 MyCompanyName. All rights reserved. // import "EntriesListViewController.h" import "EntryDetailController.h" @implementation EntriesListViewController @synthesize locationManager; @synthesize delegate; NSMutableDictionary *entries; NSMutableDictionary *dictionary; CLLocation *coords; /- (id) init { self = [super init]; if (self != nil) { self.locationManager = [[[CLLocationManager alloc] init] autorelease]; self.locationManager.delegate = self; } return self; }/ (CLLocationManager *)locationManager { if (locationManager != nil) { return locationManager; } locationManager = [[CLLocationManager alloc] init]; locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters; locationManager.delegate = self; return locationManager; } (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { //coords.longitude = newLocation.coordinate.longitude; //coords.latitude = newLocation.coordinate.latitude; coords = newLocation; NSLog(@"Location: %@", [newLocation description]); } (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error { NSLog(@"Error: %@", [error description]); } (void)viewDidLoad { //[[MyCLController alloc] init]; //[locationManager startUpdatingLocation]; [[self locationManager] startUpdatingLocation]; //---initialize the array--- //entries = [[NSMutableArray alloc] init]; //---add items--- //NSString *Path = [[NSBundle mainBundle] bundlePath]; //NSString *DataPath = [Path stringByAppendingPathComponent:@"Memorials.plist"]; dictionary = [[NSDictionary alloc] initWithContentsOfURL:[NSURL URLWithString: @"http://akm.madison.at/memorials.xml"]]; /*NSDictionary *dssItem = [dictionary objectForKey:@"1"]; NSString *text = [dssItem objectForKey:@"text"]; */ //entries = [[NSMutableDictionary alloc] init]; NSLog(@"%@", dictionary); //Path get the path to MyTestList.plist NSString *path=[[NSBundle mainBundle] pathForResource:@"Memorials" ofType:@"plist"]; //Next create the dictionary from the contents of the file. NSDictionary *dict=[NSDictionary dictionaryWithContentsOfFile:path]; //now we can use the items in the file. // self.name.text = [dict valueForKey:@"Name"] ; NSLog(@"%@",[dict valueForKey:@"Name"]); //---set the title--- self.navigationItem.title = @"Türkendenkmäler"; [super viewDidLoad]; } (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { // Return the number of sections. return 1; } (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // Return the number of rows in the section. return [dictionary count]; } // Customize the appearance of table view cells. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier] autorelease]; } // Configure the cell... NSArray *keys = [dictionary allKeys]; id key = [keys objectAtIndex:indexPath.row]; NSDictionary *tmp = [dictionary objectForKey:key]; NSString *name = [tmp objectForKey:@"name"]; cell.textLabel.text = name; cell.font = [UIFont fontWithName:@"Helvetica" size:12.0]; CLLocation *location = [[CLLocation alloc] initWithLatitude:[[tmp valueForKey:@"coords_x"] floatValue] longitude:[[tmp valueForKey:@"coords_y"] floatValue]]; /*CLLocation *newLoc = [[CLLocation alloc] initWithLatitude:coords.latitude longitude:coords.longitude];*/ //locationController = [[MyCLController alloc] init]; int distance = [coords distanceFromLocation:location]; NSLog(@"%@",distance); cell.detailTextLabel.text = [NSString stringWithFormat:@"%@m",distance]; //NSLog(@"%@", [getLocation newLoc]); return cell; } (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { EntryDetailController *detailViewController = [[EntryDetailController alloc] initWithNibName:@"EntryDetailController" bundle:nil]; //detailViewController.entrySelected = [dictionary objectAtIndex:indexPath.row]; NSArray *keys = [dictionary allKeys]; id key = [keys objectAtIndex:indexPath.row]; NSDictionary *tmp = [dictionary objectForKey:key]; NSString *name = [tmp objectForKey:@"name"]; detailViewController.entrySelected_name = name; NSString *location = [tmp objectForKey:@"location"]; detailViewController.entrySelected_location = location; NSString *type = [tmp objectForKey:@"type"]; detailViewController.entrySelected_type = type; NSString *slug = [tmp objectForKey:@"slug"]; detailViewController.entrySelected_slug = slug; [self.navigationController pushViewController:detailViewController animated:YES]; [detailViewController release]; } (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } (void)dealloc { [entries release]; [super dealloc]; } @end

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  • Behavior of retained propertie while holder is retained

    - by Aurélien Vallée
    Hello everyone, I am a beginner ObjectiveC programmer, coming from the C++ world. I find it very difficult to understand the memory management offered by NSObject :/ Say I have the following class: @interface User : NSObject { NSString* name; } @property (nonatomic,retain) NSString* name; - (id) initWithName: (NSString*) theName; - (void) release; @end @implementation User @synthetise name - (id) initWithName: (NSString*) theName { if ( self = [super init] ) { [self setName:theName]; } return self; } - (void) release { [name release]; [super release]; } @end No considering the following code, I can't understand the retain count results: NSString* name = [[NSString alloc] initWithCString:/*C string from sqlite3*/]; // (1) name retainCount = 1 User* user = [[User alloc] initWithName:name]; // (2) name retainCount = 2 [whateverMutableArray addObject:user]; // (3) name retainCount = 2 [user release]; // (4) name retainCount = 1 [name release]; // (5) name retainCount = 0 At (4), the retain count of name decreased from 2 to 1. But that's not correct, there is still the instance of user inside the array that points to name ! The retain count of a variable should only decrease when the retain count of a referring variable is 0, that is, when it is dealloced, not released.

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  • Sound not working in iPhone Simulator?

    - by pix0r
    Somehow my iPhone Simulator is unable to play sounds. First an app I'm working on using AudioServicesPlaySystemSound() stopped working.. I spent a while debugging this but sound is still working on the iPhone when I run the app on the device. I get the same results with other iPhone apps such as the sample Crash Landing app. I can't find a sound setting anywhere in the simulator or Xcode preferences. I've tried resetting the simulator through "Reset Content and Settings" menu item to no avail.

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  • How to limit NSTextField text length and keep it always upper case?

    - by carlosb
    Need to have an NSTextField with a text limit of 4 characters maximum and show always in upper case but can't figure out a good way of achieving that. I've tried to do it through a binding with a validation method but the validation only gets called when the control loses first responder and that's no good. Temporarly I made it work by observing the notification NSControlTextDidChangeNotification on the text field and having it call the method: - (void)textDidChange:(NSNotification*)notification { NSTextField* textField = [notification object]; NSString* value = [textField stringValue]; if ([value length] > 4) { [textField setStringValue:[[value uppercaseString] substringWithRange:NSMakeRange(0, 4)]]; } else { [textField setStringValue:[value uppercaseString]]; } } But this surely isn't the best way of doing it. Any better suggestion?

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  • Hide button on first of two UIViews, but have it visible on second...

    - by Scott
    So I have a UIViewController (main application controller is a TabBarController). On this there is a UINavigationBar, and a UIBarButtonItem. I'm PRETTY sure I hooked up everything correctly in the Interface Builder and that the outlet in the code is connected to the button in the .xib. It should be because the method works correctly. Now I have another button on this view that brings up a second view, a UIWebView. I want this UIBarButtonItem, labeled "Back", to make the UIWebView dissapear, and bring back the first UIView, which it DOES DO correctly. However, when you are on the first UIView, there is no need to see the UIBarButtonItem, so how can I hide it but then bring it up for the UIWebView. By the way, both views use the same UINavigationBar, the UIWebView is brought up inside the tab bar and the nav bar. Here is my code: #import "WebViewController.h" @implementation WebViewController @synthesize webButton; @synthesize item; @synthesize infoView; UIWebView *webView; + (UIColor*)myColor1 { return [UIColor colorWithRed:0.0f/255.0f green:76.0f/255.0f blue:29.0f/255.0f alpha:1.0f]; } // Creates Nav Bar with default Green at top of screen with given String as title + (UINavigationBar*)myNavBar1: (NSString*)input { UIView *test = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0.0, 0.0, test.bounds.size.width, 45)]; navBar.tintColor = [WebViewController myColor1]; UINavigationItem *navItem; navItem = [UINavigationItem alloc]; navItem.title = input; [navBar pushNavigationItem:navItem animated:false]; return navBar; } - (IBAction) pushWebButton { self.navigationItem.rightBarButtonItem = item; CGRect webFrame = CGRectMake(0.0, 45.0, 320.0, 365.0); webView = [[UIWebView alloc] initWithFrame:webFrame]; [webView setBackgroundColor:[UIColor whiteColor]]; NSString *urlAddress = @"http://www.independencenavigator.com"; NSURL *url = [NSURL URLWithString:urlAddress]; NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; webView.scalesPageToFit = YES; [webView loadRequest:requestObj]; [self.view addSubview:webView]; [webView release]; } - (void) pushBackButton { [webView removeFromSuperview]; } // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { self.navigationItem.rightBarButtonItem = nil; [super viewDidLoad]; } @end Anyone know?

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  • PerformSelectorInBackground leaking on device

    - by Oysio
    While it seems to not pose a problem on the simulator, using performSelectorInBackground on the device causes memory leaks. Or at least that's what Instruments indicates. Looking at the code I don't have a single clue what the cause could be. I tried to strip the affected code to a bare minimum but still strangely Instruments keeps showing a leak every time this piece of code is executed. Anything unusual going on here? //In viewcontrollerA: -(void)mainLoop { [self.viewControllerB performSelectorInBackground:@selector(calculateTotals) withObject:nil]; //This gives the same problem //[NSThread detachNewThreadSelector:@selector(calculateTotals) toTarget:self.viewControllerB withObject:nil]; //UI stuff ... } //viewControllerB: -(void)calculateTotals { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; //Heavy calculations ... [pool release]; }

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  • How to set the back groung color to the UIActionSheet in iPhone?

    - by Madan Mohan
    Hi Guys, I need to change the back ground colour of the action sheet, UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:@"Create Estimate", @"Record Expense",@"Add Credit",@"Delete Customer", @"Cancel", nil]; actionSheet.actionSheetStyle = UIActionSheetStyleDefault; actionSheet.destructiveButtonIndex=3; [actionSheet showInView:appDelegate.window]; // show from our table view (pops up in the middle of the table) [actionSheet release]; please tell how to set the back ground color for action sheet.

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  • iPhone: value of selectedIndex for tab should be consistent, but isn't

    - by Janine
    This should be so simple... but something screwy is happening. My setup looks like this: MainViewController Tab Bar Controller 4 tabs, each of which loads WebViewController My AppDelegate contains an ivar, tabBarController, which is connected to the tab bar controller (this was all set up in Interface Builder). The leftmost tab is marked "selected" in IB. Within the viewWillAppear method in WebViewController, I need to know which tab was just selected so I can load the correct URL. I do this by switching on appDelegate.tabBarController.selectedIndex. When the app first runs and the leftmost tab is selected, selectedIndex is a large garbage value. After that, I get values from 0 to 3, which is as it should be, but they are in random order. Not only that, but each tab I touch reports a different value each time. This app is extremely simple right now and I can't imagine what I could have done to make things go this wrong. Has anyone seen (and hopefully solved) this behavior? Update: we have a request for code. There's not much to see. The tab bar controller gets loaded in applicationDidFinishLaunching: [self.mainViewController view]; //force nib to load [self.window addSubview:self.mainViewController.tabBarController.view] There is currently no code whatsoever in MainViewController.m other than the synthesize and release for tabBarController. From WebVewController.m: - (void)viewWillAppear:(BOOL)_animation { [super viewWillAppear:_animation]; NSURL *url; switch([S_UIDelegate mainViewController].tabBarController.selectedIndex) { case 0: url = [NSURL URLWithString:@"http://www.cnn.com"]; break; case 1: url = [NSURL URLWithString:@"http://www.facebook.com"]; break; case 2: url = [NSURL URLWithString:@"http://www.twitter.com"]; break; case 3: url = [NSURL URLWithString:@"http://www.google.com"]; break; default: url = [NSURL URLWithString:@"http://www.msnbc.com"]; } NSURLRequest *request = [NSURLRequest requestWithURL:url]; [webView loadRequest:request]; } This is where I'm seeing the random values.

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  • UIImage from NSDocumentDirectory leaking memory

    - by Emil
    Hey. I currently have this code: UIImage *image = [[UIImage alloc] initWithContentsOfFile:[imagesPath stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@.png", [postsArrayID objectAtIndex:indexPath.row]]]]; It's loading in an image to set in a UITableViewCell. This obviously leaks a lot of memory (I do release it, two lines down after setting the cells image to be that image), and I'm not sure if it caches the image at all. Is there another way, that doesen't leak so much, I can use to load in images multiple times, like in a tableView, from the Documents-directory of my app? Thanks.

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  • OpenGL behaving strangely

    - by Mk12
    OpenGL is acting very strangely for some reason. In my subclass of NSOpenGLView, I have the following code in -prepareOpenGL: - (void)prepareOpenGL { GLfloat lightAmbient[] = { 0.5f, 0.5f, 0.5f, 1.0f }; GLfloat lightDiffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f }; GLfloat lightPosition[] = { 0.0f, 0.0f, 2.0f }; quality = 0; zCoord = -6; [self loadTextures]; glEnable(GL_LIGHTING); glEnable(GL_TEXTURE_2D); glShadeModel(GL_SMOOTH); glClearColor(0.2f, 0.2f, 0.2f, 0.0f); glClearDepth(1.0f); glEnable(GL_DEPTH_TEST); glDepthFunc(GL_LEQUAL); glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); glLightfv(GL_LIGHT1, GL_AMBIENT, lightAmbient); glLightfv(GL_LIGHT1, GL_DIFFUSE, lightDiffuse); glLightfv(GL_LIGHT1, GL_POSITION, lightPosition); glEnable(GL_LIGHT1); gameState = kGameStateRunning; int i = 0; // HERE ******** [NSTimer scheduledTimerWithTimeInterval:0.03f target:self selector:@selector(processKeys) userInfo:nil repeats:YES]; // Synchronize buffer swaps with vertical refresh rate GLint swapInt = 1; [[self openGLContext] setValues:&swapInt forParameter:NSOpenGLCPSwapInterval]; // Setup and start displayLink [self setupDisplayLink]; } I wanted to assign the timer that processes key input to an ivar so that I could invalidate it when the game is paused (and reinstantiate it on resume), however when I did that (as apposed to leaving it at [NSTimer scheduledTimer…), OpenGL doesn't display the cube I draw. When I take it away, it's fine. So i tried just adding a harmless statement, int i = 0; (maked // HERE *******), and that makes the lighting not work! When I take it away, everything is fine, but when I put it back, everything is dark. Can someone come up with a rational explanation for this? Thanks.

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  • How to use NSString drawInRect to centre text?

    - by Steve Folly
    How can I draw a string centred within a rect? I've started off with: (an extract from the drawRect method of my custom view) NSString* theString = ... [theString drawInRect:theRect withAttributes:0]; [theString release]; Now I'm assuming I need to set up some attributes. I've had a look through Apple's Cocoa documentation, but it's a bit overwhelming and can't find anything for how to add paragraph styles to the attributes. Also, I can only find horizontal alignment, what about vertical alignment? Thanks.

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  • Get private SecKeyRef from DER file?

    - by Alexander Parfyanovich
    In my iPhone project I have used this solution to encrypt data with DER encoded certificate, which was generated by openssl commands like this: openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout privateKey.pem -out cert.pem openssl x509 -outform der -in cert.pem -out cert.der openssl rsa -in privateKey.pem -outform DER -out privateKey.der And now I want to decrypt data using private key file. How can I get the private SecKeyRef instance from DER encoded private key file?

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  • Dismissing UIImagePickerController from UITabBarController

    - by Dave
    I have a tab bar application whereby one tab uses a navigation controller to move through a series of views. On the final view, there is a button to add a photo, which presents a UIImagePickerController. So far, so good - however when I finish picking the image, or cancel the operation, the previous view is loaded, but without the tab bar. I'm sure I'm missing something elementary, but any suggestions on how to properly release the UIImagePickerController would be much appreciated. The code is as follows: ImagePickerViewController *aController = [[ImagePickerViewController alloc]; initWithNibName:@"ImagePickerViewController" bundle:[NSBundle mainBundle]]; [self presentModalViewController:aController animated:YES]; [aController release]; //viewDidLoad self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]; imagePickerController = [[UIImagePickerController alloc] init]; imagePickerController.delegate = self; if([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]){ imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera; } else { imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; } [window addSubview:imagePickerController.view]; //ImagePickerViewController imagePickerControllerDidCancel - FinalViewController is the last view in the stack controlled by a navigation controller which contains the button to present the UIImagePickerController [picker dismissModalViewControllerAnimated:YES]; FinalViewController *aController = [[FinalViewController alloc initWithNibName:@"FinalViewController" bundle:[NSBundle mainBundle]]; [picker presentModalViewController:aController animated:YES]; [aController release];

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  • Localizing concatenated or dynamic strings

    - by SooDesuNe
    I'm familiar with using NSLocalizedString() to localize strings, but the problem I have today requires a little more finesse. My situation is like this: NSString *userName; //the users name, entered by the user. Does not need localized NSString *favoriteFood; //the users favorite food, also entered by user, and not needing localized NSString *summary = [NSString stringWithFormat:@"%@'s favorite food is %@", userName, favoriteFood]; This works fine for english, but not every language uses the same word ordering as English, for example, a word-by-word translation of the same sentance from Japanese into English would read: UserName's favorite food pizza is Not to mention that 's is doesn't make a possessive in every language. What techniques are available for localizing this type of concatenated sentence?

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