addChildViewController在横向时不工作

Question

我正在使用容器视图控制器在3秒后将子视图添加到当前视图控制器：

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor greenColor];
    [self performSelector:@selector(open) withObject:nil afterDelay:3.0];
}
-(void)open{
    ViewController2 *test = [[ViewController2 alloc] init];
    test.view.backgroundColor = [UIColor redColor];

    [self addChildViewController:test];
    [self.view addSubview:test.view];
}

ViewController2是一个简单的视图，在init上只有这个：

self.view.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;

如果我以纵向打开第二个视图并旋转到横向，红色会填满屏幕，但如果我从横向打开第二个视图，则会发生以下情况：

任何线索？

Answer 1

只需要设置框架。打开时的视图界面将采用您投影的视图的大小。

-(void)open{
    ViewController2 *test = [[ViewController2 alloc] init];
    test.view.backgroundColor = [UIColor redColor];
    test.view.frame = self.view.bounds;
    [self addChildViewController:test];
    [self.view addSubview:test.view];
}

作为建议：开始学习自动布局！

Answer 2

这是一个适合您的解决方案。

-(void)open{
    test = [self.storyboard instantiateViewControllerWithIdentifier:@"ViewController2"];
    test.view.backgroundColor = [UIColor redColor];
    test.view.frame = self.view.bounds;
    [self addChildViewController:test];
    [self.view addSubview:test.view];
 }