如何在所需的方向上添加childViewController

Question

我有一个parentViewController在potrait模式中，我想在景观模式中向它添加childViewController(它是MPMoviePlaycontroller的一个子类)--这是我正在使用的代码：

ParentViewController.m中的

-(IBAction)playMovie
{
     ChildViewController *childViewController = [[ChildViewController alloc] initWithContentURL:url];

    [self.navigationController.view addSubview:childViewController.view];
    childViewController.view.alpha = 0.0;
    [childViewController beginAppearanceTransition:YES animated:YES];
    [UIView
     animateWithDuration:0.3
     delay:0.0
     options:UIViewAnimationOptionCurveEaseOut
     animations:^(void){
         childViewController.view.alpha = 1.0;
     }
     completion:^(BOOL finished) {
         [childViewController endAppearanceTransition];
         [childViewController didMoveToParentViewController:self.navigationController];
     }
     ];

}

儿童视图控件中的.m

-(BOOL)shouldAutorotate {
    return YES;
}

-(NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskLandscape;
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
}

问题是ChildViewController仍然以纵向模式显示。

Answer 1

ChildViewController *childViewController = [ChildViewController alloc initWithContentURL:ChildViewController]；

addChildViewController:childViewController; self.navigationController

self.navigationController.view addSubview:childViewController.view；

子视图控制器应该先添加到其父视图控制器中，然后再访问它的视图。