UIViewController旋转方法详解

轉貼：http://blog.csdn.net/ch_soft/article/details/6967625

@interface UIViewController (UIViewControllerRotation)

//是否允许旋转

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation; 

// Override to allow rotation. Default returns YES only for UIInterfaceOrientationPortrait

// Notifies when rotation begins, reaches halfway point and ends.

//将开始旋转执行

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

//旋转完成后执行

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation;

// Faster one-part variant, called from within a rotating animation block, for additional animations during rotation.

// A subclass may override this method, or the two-part variants below, but not both.

//旋转动画将开始时执行

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration__OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_3_0);

// Slower two-part variant, called from within a rotating animation block, for additional animations during rotation.

// A subclass may override these methods, or the one-part variant above, but not both.

//将在动画选择到一半时执行

- (void)willAnimateFirstHalfOfRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration;

//完成动画旋转到一半时执行

- (void)didAnimateFirstHalfOfRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation; // The rotating header and footer views are offscreen.

//在第二个选择动话到一半时执行

- (void)willAnimateSecondHalfOfRotationFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation duration:(NSTimeInterval)duration; // A this point, our view orientation is set to the new orientation.