在IOS5.1 和 之前的版本中， 我們平日應用 shouldAutorotateToInterfaceOrientation: 來零丁掌握某個UIViewController的旋屏偏向支撐，好比：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    return (interfaceOrientation == UIInterfaceOrientationPortrait); 
} 

然則在IOS6中，這個辦法被放棄了，應用有效。
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.)

理論後會發明，經由過程supportedInterfaceOrientations的零丁掌握是沒法鎖定屏幕的。

-(NSUInteger)supportedInterfaceOrientations 
{ 
    return UIInterfaceOrientationMaskPortrait; 
} 

屢次試驗後總結出掌握屏幕扭轉支撐偏向的辦法以下：
子類化UINavigationController，增長辦法

- (BOOL)shouldAutorotate 
{ 
    return self.topViewController.shouldAutorotate; 
} 
 
- (NSUInteger)supportedInterfaceOrientations 
{ 
    return self.topViewController.supportedInterfaceOrientations; 
} 

而且設定其為法式進口，或指定為 self.Window.rootViewController
隨後添加本身的view controller，假如想制止某個view controller的旋屏：（支撐全體版本的掌握）

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    return (interfaceOrientation == UIInterfaceOrientationPortrait); 
} 
 
-(BOOL)shouldAutorotate 
{ 
    return NO; 
} 
 
-(NSUInteger)supportedInterfaceOrientations 
{ 
    return UIInterfaceOrientationMaskPortrait; 
} 

假如想又開啟某個view controller的全體偏向旋屏支撐：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); 
} 
 
-(NSUInteger)supportedInterfaceOrientations 
{ 
    return UIInterfaceOrientationMaskAllButUpsideDown; 
} 
 
-(BOOL)shouldAutorotate 
{ 
    return YES; 
} 

從而完成了對每一個view controller的零丁掌握。

趁便提一下，假如全部運用一切view controller都不支撐旋屏，那末爽性：

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window 
{ 
     return UIInterfaceOrientationMaskPortrait; 
} 

反正屏切換，視圖亂了怎樣辦？
起首，我們必需懂得一下以下4種狀況，它們被用來描寫裝備扭轉偏向：

關於旋屏的處置，年夜致分為以下幾種情形和思緒：
或許，你不須要旋屏支撐，而願望鎖定屏幕

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    return NO; 
} 

或許，你須要支撐旋屏，或許支撐部門偏向的旋屏

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {  
       return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); 
} 

或許，你的view有張配景圖，旋屏時體系贊助你拉伸了圖片，然則卻沒有管你的其它部件，好比button,你願望直接轉變button的年夜小和地位

-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration 
{ 
    if (UIInterfaceOrientationIsPortrait(toInterfaceOrientation)) { 
        NSLog(@"如今是豎屏"); 
        [btn setFrame:CGRectMake(213, 442, 340, 46)]; 
    } 
    if (UIInterfaceOrientationIsLandscape(toInterfaceOrientation)) { 
        NSLog(@"如今是橫屏"); 
        [btn setFrame:CGRectMake(280, 322, 460, 35)]; 
    } 
} 

或許，你其實不願望用相對坐標去束縛控件，而是願望讓它經由過程扭轉本身順應屏幕的扭轉

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    UIDevice *device = [UIDevice currentDevice];  
    [device beginGeneratingDeviceOrientationNotifications]; 
    //應用 NSNotificationCenter 取得扭轉旌旗燈號 UIDeviceOrientationDidChangeNotification 
    NSNotificationCenter *ncenter = [NSNotificationCenter defaultCenter];  
    [ncenter addObserver:self selector:@selector(orientationChanged) name:UIDeviceOrientationDidChangeNotification object:device]; 
} 
 
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); 
} 
 
-(void)rotation_btn:(float)n 
{ 
    UIButton *robtn = self.btn; 
    robtn.transform = CGAff.netransformMakeRotation(n*M_PI/180.0); 
} 
 
-(void)orientationChanged 
{ 
    UIDeviceOrientation orientaiton = [[UIDevice currentDevice] orientation]; 
     
    switch (orientaiton) { 
        caseUIDeviceOrientationPortrait:              
            [self  rotation_btn:0.0]; 
            break; 
        caseUIDeviceOrientationPortraitUpsideDown:   
            [self  rotation_btn:90.0*2]; 
            break; 
        caseUIDeviceOrientationLandscapeLeft:      
            [self  rotation_btn:90.0*3]; 
            break; 
        caseUIDeviceOrientationLandscapeRight:   
            [self  rotation_btn:90.0]; 
            break; 
        default: 
            break; 
    } 
} 

或許，你須要autoresizesSubviews = YES
或許，你願望反正屏有分歧的結構後果，須要預備2份Subview，在分歧狀況去調換
固然不要忘卻，須要調理設定圖示中的1、2處，

來贊助我們完成本身想要的順應後果。Example 動畫出現的很清楚，^_^ 我就不再煩瑣了。

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