Ios – GameCenter authentication in landscape-only app throws UIApplicationInvalidInterfaceOrientation

game-centeriosios6landscapeorientation

Problem:
If user is not logged into GameCenter account – GameCenter authentication view is launched in portrait mode (in ios 5 there were a modal dialog) asking to log in. But if I disable Portrait mode in xcode (Project Summary) or in supportedInterfaceOrientationsForWindow: (as my app supposed to run in landscape mode ONLY) I get:

Terminating app due to uncaught exception 'UIApplicationInvalidInterfaceOrientation', reason: 'Supported orientations has no common orientation with the application, and shouldAutorotate is returning YES'

If I enable Portrait for ipad/iphone (and/or comment out supportedInterfaceOrientationsForWindow:) it works without crash, but I don't want portrait mode to be enabled.

Best Answer

While writing this question and experimenting with code, it seems that I've found a solution: enable all orientations in project summary and remove application:supportedInterfaceOrientationsForWindow.

Add this code to ViewController:

- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskLandscape;
}

Now it works seamlessly.

Related Solutions

Iphone – Game center login lock in landscape only in i OS 6

At last i avoided crash by following the workaround mentioned in Apple's iOS 6 release notes.

Workaround:

1.Apps should provide the delegate method application:supportedIntefaceOrientationsForWindow and ensure that portrait is one of the returned mask values.

- (NSUInteger)application:(UIApplication*)application supportedInterfaceOrientationsForWindow:(UIWindow*)window
{

    return UIInterfaceOrientationMaskAllButUpsideDown;
}

2. When a UIBNavigationController (or a UIViewController) is involved, subclass the UINavigationController/UIViewController and overriding supportedInterfaceOrientations.

 - (NSUInteger)supportedInterfaceOrientations
    {
        return UIInterfaceOrientationMaskLandscape;
    }

And

In buid summary supported orientations selected landscape right and landscape left.

Now game center is working properly without crash.

IOS 6 revert orientation after dismissModalViewController

I think your problem is caused by this line (you have it twice in your code):

return UIInterfaceOrientationPortrait;

I'm currently trying to do s.th. similar to what you try to achieve, and have asked my question here: iOS 6 auto rotation issue - supportedInterfaceOrientations return value not respected

The problem with your code is that the two methods don't return an interface orientation but rather a mask that encodes in its bits a combination of allowed or preferred orientations.

Try this:

return UIInterfaceOrientationMaskPortrait;

UIInterfaceOrientationPortrait is mapped to 0 as far as I know and is thus interpreted as the empty set of interface orientations (none).

Best Answer

Related Solutions

Iphone – Game center login lock in landscape only in i OS 6

IOS 6 revert orientation after dismissModalViewController

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