未调用iOS8接口循环方法 [英] iOS8 Interface Rotation Methods not called

问题描述

由于 willAnimateRotationToInterfaceOrientation：duration：是已弃用，需要使用 viewWillTransitionToSize：withTransitionCoordinator： 而不是。

但是，在iOS8上的视图控制器中不会调用此方法。
还有什么我需要实现的，以便这个回调工作吗？

However, this method does not get called in my view controller on iOS8. Is there anything else, I need to implement, in order for this callback to work?

我在文档中找不到任何内容。我唯一能找到的是，它属于新的 UIContentContainer 协议。但是，即使我明确地将它添加到我的控制器的协议中，它也不起作用。

I cannot find anything in the documentation. The only thing I could find, was that it belongs to the new UIContentContainer protocol. However, even if I am adding this to the protocols of my controller explicitly, it does not work.

任何想法？

推荐答案

viewWillTransitionToSize：withTransitionCoordinator：似乎只有在接口实际要改变大小时才有效，这意味着我们已经轮换90度。如果您的布局上有一个仅允许横向的蒙版，当旋转180度时，界面大小不会改变，因此似乎不会调用此方法。

The viewWillTransitionToSize:withTransitionCoordinator: seems to only work if the interface is actually going to change size, meaning we have rotated 90 degrees. If you have a mask on your layout that only allows landscape, when rotation 180 degrees, the interface size doesn't change, so this method doesn't seem to be called.

我已经在我的应用程序中解决了这个问题，而是注册到 UIDeviceOrientationDidChangeNotification 通知，例如：

I have worked around this in my app by instead registering to the UIDeviceOrientationDidChangeNotification notification like:

（在我的查看控制器的 viewWillAppear ）：

(In my view controller's viewWillAppear):

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deviceOrientationDidChange:) name:UIDeviceOrientationDidChangeNotification object:nil];
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

（一个在我的 viewWillDisappear [记得要取消订阅]）

(An in my viewWillDisappear [remember to unsubscribe])

[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil];

我的 deviceOrientationDidChange：看起来像：

- (void)deviceOrientationDidChange:(NSNotification *)notification {
    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
    [self willRotateToInterfaceOrientation:orientation duration:1.0];
}

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