Question

我正在开发支持2种方向的iPhone应用程序。我有这个视图控制器的2个UIView文件。我需要根据设备接口方向将相应的UIView文件设置到视图控制器。你能指导我如何改变方向吗？

Answer 1

假设您已设置-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation以返回支持的方向，您可以使用以下方法，这些方法都可以在UIViewController中设置，以检查方向更改，然后设置视图：

// called just before the user interface starts to rotate - my advice would be to use this method to save a copy of the current orientation.
-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration

// called after the interface has finished rotating. Here, you can compare the old orientation with the new one - if you went from portrait to landscape, then update your views accordingly.
-(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation

希望这有帮助！

Answer 2

为什么要为两个方向使用两个视图？您可以设置控件的autoresizemask属性，如果纵向和横向两种模式具有相似的控件，则可以在同一位置显示。否则，您需要在

中使用两个视图

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration;
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation;

或者你可以收到UIDevice的通知

 UIKIT_EXTERN NSString *const UIDeviceOrientationDidChangeNotification;

- (void)beginGeneratingDeviceOrientationNotifications;      // nestable
- (void)endGeneratingDeviceOrientationNotifications;

Answer 3

只需在控制器中为这两个方向提供此委托。

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

如何在iPhone中更改方向时更改viewcontroller的视图？

3 个答案: