title: iOS routing viewDidAppear to child view controllers?
body: <p>I'm adding a child view controller to a parent view controller, and everything works as expected, except that child view controller isn't having its usual callbacks triggered. eg, things like viewWillAppear(animated) is never called. I looked into it and thought it may be because I wasn't calling willMoveToParentViewController and didMoveToParentViewController on the child view controller before and after adding it to the parent, respectively. Unfortunately, fixing that has made no difference. Does anyone know how I can wire this up so that when I do addChildViewController and removeChildViewController the regular callbacks are triggered? After adding the childViewController, I also add its view as a subview to the parent view controller's view. At neither point (addChildViewController &amp; addSubview) does the child view controller's viewWillAppear(animated), etc methods get called...</p>
  
  <p>Nick</p>