ios6:UIImagePickerController & Rotation

项目是在ipad上的横屏的项目，运行在ios6上时，在用到选择本地相册的时候崩溃：

“Terminating app due to uncaught exception 'UIApplicationInvalidInterfaceOrientation', reason: 'Supported orientations has no common orientation with the application, and shouldAutorotate is returning YES”

一查原来是ios6的rotation较之前有了改动。ios6丢弃了shouldAutorotateToInterfaceOrientation的方法，代替的是supportedInterfaceOrientations 、shouldAutorotate 、preferredInterfaceOrientationForPresentation等方法，具体变化见：iOS 6的Rotation

因为项目要求是全部横屏，但是UIImagePickerController又是竖屏显示的。违反了ios6对Rotation的新规定。最终在http://code4app.com/requirement/5074e36b6803fa8445000000

找到答案。

在appdelegate添加

#if __IPAD_OS_VERSION_MAX_ALLOWED >= __IPAD_6_0

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    return UIInterfaceOrientationAllMask;
}
#endif

然后在你UIImagePickerController的top-most VC中添加：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft||interfaceOrientation==UIInterfaceOrientationLandscapeRight);
}

//ios 6 rotation 
-(NSUInteger)supportedInterfaceOrientations{
    return UIInterfaceOrientationLandscapeMask;
}  
  
- (BOOL)shouldAutorotate  
{  
    return YES;  
}

问题解决！