如何在没有设备自动旋转的情况下检测iPhone上的旋转？ [英] How do I detect a rotation on the iPhone without the device autorotating?

问题描述

任何人都知道如何做到这一点？

Anyone know how to do this?

我认为这样：

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return YES;
}

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
}

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration {
}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
}

- (void)willAnimateFirstHalfOfRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
}

- (void)didAnimateFirstHalfOfRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
}

- (void)willAnimateSecondHalfOfRotationFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation duration:(NSTimeInterval)duration {
}

可以防止设备旋转（覆盖我的UIViewController的所有旋转方法，而不是调用超类），但我担心它不是实际执行旋转的UIViewController。

may prevent the device from rotation (overriding all rotate methods of my UIViewController and not calling the superclass) but I fear it's not the UIViewController that actually performs the rotation.

我的UIViewController在一个UINavigationController中。

My UIViewController is in a UINavigationController.

任何人都有什么想法？

推荐答案

您可以注册通知 UIDeviceOrientationDidChangeNotification $ c> UIDevice.h ），然后当你关心方向变化时调用这个方法：

You can register for the notification UIDeviceOrientationDidChangeNotification (from UIDevice.h), and then when you care about orientation changes call this method:

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

当您不再关心方向更改时，请调用此方法：

When you no longer care about orientation changes, call this method:

[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];

通知将在适当时发送，您可以检查 [UIDevice currentDevice ] .orientation ，找出当前的方向。

The notification will be sent when applicable, and you can check [UIDevice currentDevice].orientation to find out what the current orientation is.

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