iOS6的旋屏控制技巧

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;
}
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