使用UITabBarController管理UINavigationController时，Push出第三个界面时怎么横屏？

Question

在push出的viewcontroller里面 下面方法不会被执行

- (BOOL)shouldAutorotate
{
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscapeLeft;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeLeft;
}

Answer 1

我之前是这么做的：
添加UITabBarController、UINavigationController的分类

UITabBarController (xxx)

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

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

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

UINavigationController (xxx)

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

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

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

Answer 2

UINavigationController的回调是有效的，viewcontroller只有一个回调是必要的，忘了那个了。你两个都写把。其实就是你顶层的viewcontroller也要控制。

Answer 3

请问下正确的做法是什么 我按上面做的还是没有效果？