如何修正iOS6上Oritentation的问题

1.将addSubview修改为setRootViewController

[window addSubview: viewController.view];

修改如下：

if ( [[UIDevice currentDevice].systemVersion floatValue] < 6.0)
{
    // warning: addSubView doesn't work on iOS6
    [window addSubview: viewController.view];
}
else
{
    // use this mehod on ios6
    [window setRootViewController:viewController];
}

2.修改shouldAutorotateToInterfaceOrientation

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

iOS6以前会呼叫这方法来判断手机是垂直或打横

// For ios6, use supportedInterfaceOrientations & shouldAutorotate instead of shouldAutorotateToInterfaceOrientation
- (NSUInteger) supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskLandscape;
}

- (BOOL) shouldAutorotate {
    return YES;
}

iOS6需在加上上面方法