以编程方式嵌入UIViewController？

Question

我有一个UIViewController带有容器视图的Storyboard设置,以便我可以在其中嵌入另一个UIViewController.

在某种情况下,我需要更改嵌入式视图控制器.在我的故事板中,我不能从容器视图中获得两个segue(只有一个嵌入segue).这导致我以编程方式进行.

我在我的故事板中有我的容器视图,没有连接嵌入segue.

现在从这一点开始,我如何以编程方式嵌入我选择的UIViewController对象？

Answer 1

您可以通过编程方式执行此操作,下面的方法将采用bool值来决定哪个视图控制器需要在容器视图中添加,然后将实例化一个对象,然后将其添加到 containerView

- (void)addViewControllerToContainerView:(BOOL)addVC1
{
// Get storyboard
UIStoryboard *storyBoard = [UIStoryboard storyboardWithName:@"<name of storyboard>" bundle:[NSBundle mainBundle]];
    UIViewController *viewController = nil;
    if (addVC1)
    {
// get viewController with identifier 
        viewController = [storyBoard instantiateViewControllerWithIdentifier:@"<View Controller 1 Identifier>"];
    }
    else
    {
        viewController = [storyBoard instantiateViewControllerWithIdentifier:@"<View Controller 2 Identifier>"];
    }
// lets add it to container view
    [viewController willMoveToParentViewController:self];
    [self.view addSubview:viewController.view];
    [self addChildViewController:viewController];
    [viewController didMoveToParentViewController:self];
// keep reference of viewController which may be useful when you need to remove it from container view, lets consider you have a property name as containerViewController
    self.containerViewController = viewController;
}

需要从容器视图控制器中删除视图控制器时,可以执行此操作

   [self.containerViewController willMoveToParentViewController:nil];  // 1   
   self.containerViewController.view removeFromSuperView];
   [self.containerViewController removeFromParentViewController];//this line is updated as view is removed from parent view cotnroller istead of its viewcontroller is removed from parentViewController 
   self.containerViewController = nil

关于容器视图控制器的Apple文档