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POForce device rotation with +attemptRotationToDeviceOrientation failing
 

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  1. POForce device rotation with +attemptRotationToDeviceOrientation failing
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    <p>According to the <code>UIViewController</code> docs here, </p> <p><a href="https://developer.apple.com/library/ios/documentation/uikit/reference/UIViewController_Class/Reference/Reference.html#//apple_ref/occ/clm/UIViewController/attemptRotationToDeviceOrientation" rel="noreferrer">https://developer.apple.com/library/ios/documentation/uikit/reference/UIViewController_Class/Reference/Reference.html#//apple_ref/occ/clm/UIViewController/attemptRotationToDeviceOrientation</a></p> <p>using <code>[UIViewController attemptRotationToDeviceOrientation]</code> forces the system to attempt to rotate the interface to a new orientation. I am attempting to force an interface rotation from portrait to landscape by:</p> <ul> <li>setting a <code>forceLandscape</code> flag before attempting the rotation</li> <li>Calling <code>[UIViewController attemptRotationToDeviceOrientation]</code></li> <li>implementing <code>-supportedInterfaceOrientations</code> in my view controller and checking a flag to change the supported orientations, e.g.</li> </ul> <p>This forces <code>-supportedInterfaceOrientations</code> to be called again, which looks like</p> <pre><code>- (NSUInteger)supportedInterfaceOrientations { return self.forceLandscape ? UIInterfaceOrientationMaskLandscapeLeft : UIInterfaceOrientationMaskPortrait; } </code></pre> <p>Even though <code>-supportedInterfaceOrientations</code> is being called and returns the new orientation, the interface does not rotate. I have confirmed that the project allows all orientations and that this view controller is the window's root view controller. Has anyone else run into this problem and found a solution? I am aware of all the hacks to fix this (presenting and dismissing modals, etc), but I would like a clean solution if possible. I have verified this issue on iOS 6 and 7.</p> <p>Below is the complete code to reproduce:</p> <pre><code>@interface ALTViewController () @property (nonatomic, assign) BOOL forceLandscape; @end @implementation ALTViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { self.forceLandscape = NO; } return self; } - (void)viewDidLoad { [super viewDidLoad]; UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem]; [button setTitle:@"button" forState:UIControlStateNormal]; [button sizeToFit]; [self.view addSubview:button]; button.center = self.view.center; [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside]; } - (void)buttonPressed:(id)sender { self.forceLandscape = YES; [UIViewController attemptRotationToDeviceOrientation]; } - (NSUInteger)supportedInterfaceOrientations { return self.forceLandscape ? UIInterfaceOrientationMaskLandscapeLeft : UIInterfaceOrientationMaskPortrait; } </code></pre>
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    1. USalexshafran
    1. USalexshafran
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      1. POForce device rotation with +attemptRotationToDeviceOrientation failing
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      1. VTUpMod
    1. COWithin your question, you seem to mix the term device with the term interface which makes it a bit hard to understand what you are attempting to achieve. Are you attempting to rotate the interface to new orientation even though the device remains in the same orientation?
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      1. POForce device rotation with +attemptRotationToDeviceOrientation failing
      1. USTill
    2. COTill - agreed :) I just edited the question for clarity. You are right, I am trying to force the interface from portrait to landscape orientation while the device remains in portrait orientation.
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      1. USalexshafran
 

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