Add a child view controller's view to a subview of the parent view controller

Question

I want to add a tableViewController as a child view controller of a containerViewController (shown below). According to Apple's View Controller Programming Guide I can achieve this by the following lines of code inside my containerViewController:

   [self addChildViewController:tableViewController];    [self.view addSubview:tableViewController.view];    [tableViewController didMoveToParentViewController:self]; 

In fact, that works fine. Now the problem is that I do not want to add the tableViewController's view as a subview of the containerViewController's root view. Instead I want to add it as a subview of the containerView (see image) which itself is a subview of the containerViewController's root view. So I changed the above code as follows:

   [self addChildViewController:tableViewController];    [self.contentView addSubview:tableViewController.view];    [tableViewController didMoveToParentViewController:self]; 

Now when I launch the app it crashes immediately with this error:

Terminating app due to uncaught exception 'UIViewControllerHierarchyInconsistency', reason: 'child view controller: should have parent view controller: but actual parent is:'

What is the problem here? Is it not possible to add a childViewController's view to a specific sub view of its containerViewController? Or how can I achieve this without an error in the view controller hierarchy?

Answer 1

It doesn't really matter which view you are adding the child viewController to. If a view of a viewController is added to another viewController you need set it properly.

tableViewController.view.frame = self.contentView.bounds; [self.contentView addSubview:tableViewController.view]; /*Calling the addChildViewController: method also calls  the child’s willMoveToParentViewController: method automatically */ [self addChildViewController:tableViewController]; [tableViewController didMoveToParentViewController:self]; 

Source code

Answer 2

//class name InfoViewController  IBOutlet UIView *addViewToAddPlot; InfoViewController *InfoController;  -(void) add_method {     InfoController = [[InfoViewController alloc] initWithNibName:@"InfoViewController" bundle:nil];     InfoController.view.frame = self.addViewToAddPlot.bounds;      [self containerAddChildViewController:InfoController]; }  -(void) remove_method {     [self containerRemoveChildViewController : InfoController]; }  - (void)containerAddChildViewController:(UIViewController *)childViewController {      [self addChildViewController:childViewController];     [self.addViewToAddPlot addSubview:childViewController.view];     [childViewController didMoveToParentViewController:self];  }  - (void)containerRemoveChildViewController:(UIViewController *)childViewController {      [childViewController willMoveToParentViewController:nil];     [childViewController.view removeFromSuperview];     [childViewController removeFromParentViewController];  } 

Add and remove viewcontroller ,#childviewcontroller