shouldAutorotateToInterfaceOrientation在iOS 6中不起作用

Question

在iOS 6 shouldAutorotateToInterfaceOrientation中无效，但在iOS 5.0或中正常工作5.1。我应该需要改变什么iOS 6。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，我发现了所有这一切但对我没有任何帮助:(请帮助.....

Answer 1

之所以发生这种情况，是因为Apple改变了管理Orientation的方式UIViewController。在iOS6中，方向处理方式有所不同。在iOS6中，该 shouldAutorotateToInterfaceOrientation方法已弃用。视图控制器（例如UINavigationController）不咨询其子级来确定是否应自动旋转。默认情况下，UIInterfaceOrientationMaskAll针对iPad 习惯用语和UIInterfaceOrientationMaskAllButUpsideDowniPhone习惯用语，将应用程序和视图控制器的受支持的界面方向设置为。

如果要将特定的视图更改为所需的方向，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视图控制器中。这将有助于UIViewController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（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。无论何时更改设备方向，此方法都将被称为：

 - (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，您需要在窗口上添加控制器，rootViewController而不是addSubview如下所示

self.window.rootViewController=viewController;

有关更多信息，这里是有关iOS6.0 Beta 2 OTA的文章。

我希望这可以帮到你。

Answer 2

我解决此问题的方法是，当我的应用程序在Delegate类中启动时替换以下行

 window addSubview: navigationController.view

与

window.rootViewController = navigationController

进行此更改后，我的应用开始处理屏幕旋转

Answer 3

我解决了这个问题，只是用这个

    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {    

    if(![AppDelegate instance])

        return (interfaceOrientation == UIInterfaceOrientationPortrait) || (interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown);

    if([[[AppDelegate 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);

                NSComparisonResult order = [[UIDevice currentDevice].systemVersion compare: @"6.0" options: NSNumericSearch];

                if (order == NSOrderedSame || order == NSOrderedDescending)

                {

                    // OS version >= 6.0

                    NSLog(@"ami iOS 6 er device");

                    _previewCamera.transform = CGAffineTransformMakeRotation(M_PI_2);

                }

                else

                {

                    // OS version < 6.0

                    _previewCamera.transform = CGAffineTransformMakeRotation(M_PI*1.5);

                }

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

                NSLog(@"-->%s %d",__FUNCTION__,__LINE__);

                break;

            }

            case UIInterfaceOrientationPortraitUpsideDown:

            {

                nAngle = 270;

                bRet = YES;

                NSComparisonResult order = [[UIDevice currentDevice].systemVersion compare: @"6.0" options: NSNumericSearch];

                if (order == NSOrderedSame || order == NSOrderedDescending)

                {

                    // OS version >= 6.0

                    NSLog(@"ami iOS 6 er device");

                    _previewCamera.transform = CGAffineTransformMakeRotation(M_PI*1.5);

                }

                else

                {

                    // OS version < 6.0

                    _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;    

}