ios - UIViewControllerContext initalFrameForViewController & finalFrameForViewController show 0 for all values -

I am implementing my own custom UIViewController transition and when I click on the debugger's frame To see the controller output, I get the {{0, 0}, {0}} for both the initial and the final frames. I thought that this method on reference is considered to show the initial frame before the final fracture and infection before the final transition.

Is this going to work?

  - (minus) Prarnbintraktiv Tronnsisn: (ID & lt; UIViewControllerContextTransitioning & gt;) transition Contaks {UIViewController * fromVC = [Transition Content View-View-Controller Foreki: UITransitionContextFromViewControllerKey]; UIViewController * toVC = [Transition Content Visual View Controller Foreiki: UITransitionContextToViewControllerKey]; CGRect initialToFrame = [transitionContext initialFrameForViewController: toVC]; CGRTT Last Topframe = [Transition Consult FinalForForvient Controller: Towisi]; Anselog (@ "initial Tofram:% @, final Tofram:% @", Ansstiingfromsigret (initial Tofram), Ansstiringfromsijiakt (final Tofrem)); }   
 Showing debugger:  initialToFrame: {{0,}, {0}}, final tofrem: {{0,}, {0}}   
 Additionally, the debugger is also showing the following warning. Does it contribute to error anyway?  
  It is frustrating to present view controllers on different view controllers    
 
 
 You should first know that there are about two types of custom changes: Full and non-fullscreen and those who are seeking the last frame for  toVC.vew  are a non- There is absolutely no sense in the fullscreen transition.  
 Set in cases where you  modalPresentationStyle  are not set or it is clearly  UIModalPresentationFullScreen  (this is the default value) know UIKit That  toVC.view  will cover the entire screen, so the  -finalFrameForViewController: toVC  will return the correct frame: the main screen frame.  using 
 modalPresentationStyle = UIModalPresentationCustom  you can specify that the transition should be non-fullscreen, that is:  toVC.view  will be partially covered by < Code> FromVC.view  (and the chicken CE  fromCV.view  will be placed in the hierarchy);  Where   toVC.view  Your decision will be  fromVC.view , this is the reason that  -finalFrameForViewController:  returns  CGRectZero .  
 What is that  CGRectZero  is telling you: "Hey buddy  
 For more information see this presentation:  
 Hope That it would be helpful.