ios - 以编程方式嵌入 UIViewController？

Question

我有一个带有 UIViewController 和容器 View 的 Storyboard 设置，这样我就可以在其中嵌入另一个 UIViewController。

在某些情况下，我需要更改嵌入式 View Controller 。在我的 Storyboard中，我的容器 View 中不能有两个转场(只有一个嵌入转场)。这让我以编程方式进行。

我的 Storyboard中有我的容器 View ，没有连接的嵌入转场。

现在，我该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，下面是一个方法，该方法将采用 bool 值来决定需要在容器 View 中添加哪个 View Controller ，然后实例化一个对象，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;
}

当你需要从容器 View Controller 中移除 View Controller 时，你可以这样做

   [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

Apple docs关于容器 View Controller