在iOS5.1 和 之前的版本中, 我們通常利用 shouldAutorotateToInterfaceOrientation: 來單獨控制某個UIViewController的旋屏方向支援,比如:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
但是在iOS6中,這個方法被廢棄了,使用無效。
shouldAutorotateToInterfaceOrientation:
Returns a Boolean value indicating whether the view controller supports the specified orientation. (Deprecated in iOS 6.0. Override the supportedInterfaceOrientations andpreferredInterfaceOrientationForPresentation methods instead.)
實踐後會發現,通過supportedInterfaceOrientations的單獨控制是無法鎖定螢幕的。
-(NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskPortrait;
}
多次實驗後總結出控制旋轉螢幕支援方向的方法如下:
子類化UINavigationController,增加方法
- (BOOL)shouldAutorotate
{
return self.topViewController.shouldAutorotate;
}
- (NSUInteger)supportedInterfaceOrientations
{
return self.topViewController.supportedInterfaceOrientations;
}
並且設定其為程式入口,或指定為 self.window.rootViewController
隨後添加自己的view controller,如果想禁止某個view controller的旋屏:(支援全部版本的控制)
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
-(BOOL)shouldAutorotate
{
return NO;
}
-(NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskPortrait;
}
如果想又開啟某個view controller的全部方向旋屏支援:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
-(NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskAllButUpsideDown;
}
-(BOOL)shouldAutorotate
{
return YES;
}
從而實現了對每個view controller的單獨控制。
順便提一下,如果整個應用所有view controller都不支援旋屏,那麼乾脆:
- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
return UIInterfaceOrientationMaskPortrait;
}
From:http://www.devdiv.com/forum.php?mod=viewthread&tid=144725