您使用 presentModalViewController 或 pushViewController 呈现的视图控制器应该支持任何方向，使用此方法：

The view's controller that you present either using presentModalViewController OR pushViewController should support any orientation, using this method:

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

使用这种方法，当您以横向显示控制器时，也以横向方向显示。

With this method, when you present your controller in landscape orientation, it will correctly appear in landscape orientation, too.