如何在没有设备自动旋转的情况下检测 iPhone 上的旋转?

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

问题描述

有人知道怎么做吗?

我是这么想的:

-(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 {
}

可能会阻止设备旋转(覆盖我的 UIViewController 的所有旋转方法而不调用超类)，但我担心实际执行旋转的不是 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 UINavigationController 中.

My UIViewController is in a UINavigationController.

有人有什么想法吗?

干杯，尼克.

推荐答案

你可以注册通知UIDeviceOrientationDidChangeNotification(来自UIDevice.h)，然后当你关心关于方向变化调用这个方法:

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

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

当你不再关心方向变化时，调用这个方法:

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

[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];

通知将在适用时发送，您可以检查 [UIDevice currentDevice].orientation 了解当前方向是什么.

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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