将UIViewControllers视图添加为另一个UIViewController视图的子视图

Question

I have a UiView called TestView which I have added as a subView of my NumberViewController.

On start of my app, My rootViewController is PaperViewController, this has some UIButtons which I have added through xib, Now I wanted to add NumberViewController's view as a subView of PaperViewController, so I did this

 NumberViewController = [[NumberViewController alloc] initWithNibName:@"NumberViewController" bundle:nil];
    NumberViewController.delegate = self;
    [self.view addSubview:NumberViewController.view];
    NumberViewController.view.backgroundColor = [UIColor clearColor];
    NumberViewController.view.hidden = YES;

Now this is hidden because, I will unhide it on click of some button and then I will show NumberViewContrller's view.This all works fine.

But suppose I added some buttons in PaperViewController through code, and then unhide NumberViewController's view , then both views overlap.

I am not understanding what is the problem, and what mistake I am making. So friends please help me out

Regards Ranjit.

Answer 1

Add UIView in Header:

@property (weak, nonatomic) IBOutlet UIView *addChildView;

In - (void)viewDidLoad - Method do this:

  ChildViewController *nonSystemsController = [[ChildViewController alloc] initWithNibName:@"ChildViewController" bundle:nil];

    nonSystemsController.view.frame = self.addChildView.bounds;    
    [self.addChildView addSubview:nonSystemsController.view];

    [nonSystemsController didMoveToParentViewController:self];
[self addChildViewController:nonSystemsController];