在iOS5.1 和 以前的版本中, 咱們一般利用 shouldAutorotateToInterfaceOrientation: 來單獨控制某個UIViewController的旋屏方向支持,好比:app
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation == UIInterfaceOrientationPortrait); }
可是在iOS6中,這個方法被廢棄了,使用無效。ide
shouldAutorotateToInterfaceOrientation:spa
Returns a Boolean value indicating whether the view controller supports the specified orientation. (Deprecated in iOS 6.0. Override the supportedInterfaceOrientations andpreferredInterfaceOrientationForPresentation methods instead.)code
實踐後會發現,經過supportedInterfaceOrientations的單獨控制是沒法鎖定屏幕的。ci
-(NSUInteger)supportedInterfaceOrientations { return UIInterfaceOrientationMaskPortrait; }
屢次實驗後總結出控制屏幕旋轉支持方向的方法以下:it
子類化UINavigationController,增長方法io
- (BOOL)shouldAutorotate { return self.topViewController.shouldAutorotate; } - (NSUInteger)supportedInterfaceOrientations { return self.topViewController.supportedInterfaceOrientations; }
而且設定其爲程序入口,或指定爲 self.window.rootViewControllerclass
隨後添加本身的view controller,若是想禁止某個view controller的旋屏:(支持所有版本的控制)程序
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation == UIInterfaceOrientationPortrait); } -(BOOL)shouldAutorotate { return NO; } -(NSUInteger)supportedInterfaceOrientations { return UIInterfaceOrientationMaskPortrait; }
若是想又開啓某個view controller的所有方向旋屏支持:方法
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); } -(NSUInteger)supportedInterfaceOrientations { return UIInterfaceOrientationMaskAllButUpsideDown; } -(BOOL)shouldAutorotate { return YES; }
從而實現了對每一個view controller的單獨控制。
順便提一下,若是整個應用全部view controller都不支持旋屏,那麼幹脆:
- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window { return UIInterfaceOrientationMaskPortrait; }