iOS6以上控制螢幕旋轉

一般的設定方式

//支援Xcode 4.5
- (NSUInteger) supportedInterfaceOrientations{
//僅正面
// return UIInterfaceOrientationMaskPortrait;

//支援縱向 （利用 | 設定多參數）
// return UIInterfaceOrientationMaskPortrait
// | UIInterfaceOrientationMaskPortraitUpsideDown;

//支援橫向
//UIInterfaceOrientationMaskLandscape: 支援按鈕在左、按鈕在右
// return UIInterfaceOrientationMaskLandscape;

//支援四個方向
return UIInterfaceOrientationMaskAll;

}

- (BOOL) shouldAutorotate {
return YES;
}

TabBarController設定方式

假使今天要控制所有畫面中，某些可支援旋轉，某些不行，
在有使用Navigation Controller和TabBarController的狀況時，
則需要這樣設定：

1. 勾選支援畫面旋轉
   
2. 在AppDelegate加上這段程式碼

   - (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
   {
       NSUInteger orientations = UIInterfaceOrientationMaskAll;
   
       if (self.window.rootViewController) {
           UIViewController* presented = [[(UINavigationController *)self.window.rootViewController viewControllers] lastObject];
           orientations = [presented supportedInterfaceOrientations];
       }
       return orientations;
   }

3. 在tabBarController裡加上

   -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{
       return [self.selectedViewController shouldAutorotateToInterfaceOrientation:interfaceOrientation];
   }
   
   -(NSUInteger)supportedInterfaceOrientations{
       if (self.selectedViewController)
           return [self.selectedViewController supportedInterfaceOrientations];
   
       return UIInterfaceOrientationMaskPortrait;
   }
   
   -(BOOL)shouldAutorotate{
       return [self.selectedViewController shouldAutorotate];
   }

4. 不支援旋轉的子畫面加上

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

5. 要支援旋轉的子畫面加上

   - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
   {
       return YES;
   }
   
   - (BOOL)shouldAutorotate
   {
       return YES;
   }
   
   - (NSInteger)supportedInterfaceOrientations
   {
       return UIInterfaceOrientationMaskAllButUpsideDown;
   }

Navigation Controller設定方式

若要控制在Navigation Controller之下的單獨畫面是否支援旋轉，則需要在Controller裡加上這段

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return [self.visibleViewController shouldAutorotateToInterfaceOrientation:interfaceOrientation];
}

- (BOOL)shouldAutorotate {
    return [self.visibleViewController shouldAutorotate];
}

- (NSUInteger)supportedInterfaceOrientations {
    return [self.visibleViewController supportedInterfaceOrientations];
}