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POModal view controller not presented anymore after being presented 2/3 times
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  1. POModal view controller not presented anymore after being presented 2/3 times
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    copied!<p>Here is the thing, I have to integrate an augmented reality functionality into an app. After testing it aside, now I'm ready to integrate it. The app always runs in Portrait, I decided to show the augmented reality when rotating the iPhone in Landscape Right or Left (and of course, if I go back in Portrait the original view controller is shown). In fact the augmented reality is presented modally. </p> <p>I've got viewController calling ARViewController (modally). It works fine if I rotate like 2 or 3 times, but then this ARViewController is not called anymore, but the app is still running, no crash, no freeze. This ARViewController is initialised with ARController, a class computing all needed for the augmented reality. If I call this ARViewcontroller without the ARController, switching between the view controllers works very fine, a blank window will be called but at least I can rotate the device as much as I want. So, this must come from the ARController, I documented myself on memory leaks (by the way I'm using ARC), I think this could be the reason to the issue since I'm using this ARController many times.</p> <p>But before going further, I'd like to know if I'm doing anything wrong that could influence the ARController by switching between view controllers:</p> <p>Here is how I call the ARViewController in viewController:</p> <pre><code>if (orientation == UIDeviceOrientationLandscapeLeft) { NSLog(@"ViewController Landscape left"); ARViewController *arVC = [[ARViewController alloc] initWithNibName:@"ARViewController" bundle:nil]; [self setCameraViewController:arVC]; [arVC setModalTransitionStyle: UIModalTransitionStyleFlipHorizontal]; [[self navigationController] presentModalViewController:cameraViewController animated:YES]; arVC = nil; } else if (orientation == UIDeviceOrientationLandscapeRight) { NSLog(@"ViewController Landscape Right"); ARViewController *arVC = [[ARViewController alloc] initWithNibName:@"ARViewController" bundle:nil]; [self setCameraViewController:arVC]; [arVC setModalTransitionStyle: UIModalTransitionStyleFlipHorizontal]; [[self navigationController] presentModalViewController:cameraViewController animated:YES]; arVC = nil; } </code></pre> <p>the initialisation of ARViewController:</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; self.arController = [[ARController alloc] initWithViewController:self]; arController.filterDiscover = filterDiscover; arController.filterEat = filterEat; arController.filterSleep = filterSleep; // Listen for changes in device orientation [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deviceOrientationDidChange:) name: UIDeviceOrientationDidChangeNotification object:nil]; [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; //if ViewController presents this modal ARViewController if(!arController.filterDiscover &amp;&amp; !arController.filterEat &amp;&amp; !arController.filterSleep) [arController callAlertViewToFilter]; else [arController loadData]; } </code></pre> <p>And finally here is how I go back to the original view controller if I rotate to Portrait in ARViewController:</p> <pre><code>if (orientation == UIDeviceOrientationPortrait){ NSLog(@"ARViewController Portrait"); [self setArController:nil]; [[super presentingViewController] dismissModalViewControllerAnimated:YES]; } </code></pre> <p>I tried to be as clear as possible, if anyone has ever had an issue similar to this, it could be great have some clues to solve this. I could have shown the code of the ARController but it is a little too long, for now I'd just like to know if there is anything wrong here. If needed I'll show it.</p> <p>This might help, I found this output in the debug area when the ARViewController is not being displayed anymore:</p> <pre><code>2012-10-24 17:57:51.072 beiceland[20348:907] ViewController Landscape Right 2012-10-24 17:57:51.073 beiceland[20348:907] Warning: Attempt to present &lt;ARViewController: 0x203f0c60&gt; on &lt;RevealController: 0x1cd5dca0&gt; while a presentation is in progress! </code></pre>
 

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