AppDelegate.h 加

@property (nonatomic, assign) BOOL allowRotation;

Appdelegate.m加

-(NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window

{

　　if (self.allowRotation) {

　　　　return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight;

　　}

　　return UIInterfaceOrientationMaskPortrait;

}

- (NSUInteger)supportedInterfaceOrientations

{

　　return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight;

}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation

{

　　return UIInterfaceOrientationPortrait;

}

之后在需要支持屏幕旋转的界面的特定位置上添加代码：

• 打开屏幕旋转：

　　AppDelegate  *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

　　delegate.allowRotation = YES;

• 关闭屏幕旋转：

　　AppDelegate  *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

　　delegate.allowRotation = NO;