Should child view controllers have a common parent view controller?

In my application, I am trying to switch views, each of which is their own XIB when using custom animations. I made the base view controller as the parent view to store all the code, but I just can't get it to work.

I made an IBOutlet for all view controllers in my application and in the interface builder, I connect the sockets to the correct controller. Each controller loads the corresponding XIB, so none of them is a problem. The problem is the following change to the view code.

This is my code:

-(void)changeViews {
    CGRect frame = self.view.frame;
    frame.origin.x = CGRectGetMaxX(frame);
    theView4.view.frame = frame;

    [self.view addSubview:theView4.view];
    [self addChildViewController:theView4];

    [self transitionFromViewController:theView1 
                      toViewController:theView4 
                              duration:1 
                               options:UIViewAnimationOptionTransitionNone
                            animations: ^{
                                CGRect frame = self.view.frame;
                                theView4.view.frame = frame;
                                frame.origin.x -= frame.size.width;
                                self.view.frame = frame;
                            }
                            completion:completion:nil];

And this is the console crash:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Children view controllers <MyGameViewController: 0x1dd25210> and <Settings: 0x1dd249d0> must have a common parent view controller when calling -[UIViewController transitionFromViewController:toViewController:duration:options:animations:completion:]'

Does anyone know how to fix this?

Thank!