xcode - shouldAutorotateToInterfaceOrientation在iOS 6中不起作用

Question

在iOS 6中，shouldAutorotateToInterfaceOrientation无法正常工作，但在iOS 5.0和5.1中可以正常工作。
对于iOS 6我需要更改什么？这是我的代码:

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
if([[[SampleApplicationAppDelegate instance].callInfoDictionary valueForKey:IS_CHAT] isEqualToString:NO_RESPONSE])
{
    int nAngle = 0;
    BOOL bRet = NO;
    
    switch (interfaceOrientation) {
        case UIInterfaceOrientationPortrait:
            nAngle = 90;
            bRet = YES;
            NSLog(@".......Preview = %f %f",_previewCamera.frame.size.width,_previewCamera.frame.size.height);
            
            _previewCamera.transform = CGAffineTransformMakeRotation(M_PI*1.5);
            
            NSLog(@"Preview = %f %f",_previewCamera.frame.size.width,_previewCamera.frame.size.height);
            break;
            
        case UIInterfaceOrientationPortraitUpsideDown:
            nAngle = 270;
            bRet = YES;
            _previewCamera.transform = CGAffineTransformMakeRotation(M_PI_2);
            break;
            
        case UIInterfaceOrientationLandscapeLeft:
            nAngle = 0;
            bRet = YES;
            //_previewCamera.transform = CGAffineTransformMakeRotation(M_PI*1.5);
            break;
            
        case UIInterfaceOrientationLandscapeRight:
            nAngle = 180;
            bRet = YES;
            //_previewCamera.transform = CGAffineTransformMakeRotation(M_PI_2);
            break;
            
        default:
            break;
    }                
    return bRet;
}    
if(interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown)
    return YES;     
return NO;    
}

当我搜索此定向问题时，发现的只是 this和 this，但对我没有任何帮助:(
请帮忙 .....

Answer 1

编辑:发生这种情况是因为Apple已更改了管理UIViewController方向的方法。在iOS6中，方向处理方式有所不同。在中，不推荐使用iOS6 shouldAutorotateToInterfaceOrientation方法。 View Controller (例如UINavigationController)不咨询其子级来确定是否应自动旋转。默认情况下，将应用程序和 View Controller 的受支持的界面方向设置为iPad的UIInterfaceOrientationMaskAll和iPod的idit_code。

如果要将特定的 View 更改为所需的方向，则必须执行某种子类或类别，并重写自动旋转方法以返回所需的方向。

将此代码放在您的根 View Controller 中。这将帮助UIInterfaceOrientationMaskAllButUpsideDown确定其方向。

  //RotationIn_IOS6 is a Category for overriding the default orientation.

  @implementation UINavigationController (RotationIn_IOS6)

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

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

 - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
 {
     return [[self.viewControllers lastObject]  preferredInterfaceOrientationForPresentation];
 }

 @end

现在，您需要在viewController中实现以下方法(在iOS6中引入)以进行定向

- (BOOL)shouldAutorotate
{
    //returns true if want to allow orientation change
    return TRUE;


}
- (NSUInteger)supportedInterfaceOrientations
{   
     //decide number of origination tob supported by Viewcontroller.
     return UIInterfaceOrientationMaskAll;


}

 - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
   {
     //from here you Should try to Preferred orientation for ViewController 
   }

并将您的代码放入下面的方法中。每当设备方向改变时
该方法将被称为:

 - (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)  interfaceOrientation duration:(NSTimeInterval)duration
{
if([[[SampleApplicationAppDelegate instance].callInfoDictionary valueForKey:IS_CHAT] isEqualToString:NO_RESPONSE])
{
    int nAngle = 0;
    BOOL bRet = NO;

    switch (interfaceOrientation) {
        case UIInterfaceOrientationPortrait:
            nAngle = 90;
            bRet = YES;
            NSLog(@".......Preview = %f %f",_previewCamera.frame.size.width,_previewCamera.frame.size.height);

            _previewCamera.transform = CGAffineTransformMakeRotation(M_PI*1.5);

            NSLog(@"Preview = %f %f",_previewCamera.frame.size.width,_previewCamera.frame.size.height);
            break;

        case UIInterfaceOrientationPortraitUpsideDown:
            nAngle = 270;
            bRet = YES;
            _previewCamera.transform = CGAffineTransformMakeRotation(M_PI_2);
            break;

        case UIInterfaceOrientationLandscapeLeft:
            nAngle = 0;
            bRet = YES;
            //_previewCamera.transform = CGAffineTransformMakeRotation(M_PI*1.5);
            break;

        case UIInterfaceOrientationLandscapeRight:
            nAngle = 180;
            bRet = YES;
            //_previewCamera.transform = CGAffineTransformMakeRotation(M_PI_2);
            break;

        default:
            break;
    }                
  }    

编辑:检查您的窗口，您需要在窗口上将 Controller 添加为 UIViewController而不是像下面的 rootViewController

self.window.rootViewController=viewController;

有关更多信息， idiom是有关iOS6.0 Beta 2 OTA的文章。

我希望这可以帮到你。