UITransitionContextFromViewControllerKey returning wrong ViewController

Question

I want to add Transition animation from ViewController1 to ViewController2. Following picture showing BaseTabBarController and TableViewController. BaseTabBarController has its over .h and .m files named (BaseTabBarController); If i will add any view in base tab bar then it will be added in TableViewController. I am pushing a third ViewController from TableViewController. So in below code, fromVC should be TableViewController but it contains BaseTabBarViewController. I can't able to get any idea what's going on here? Please suggest any solution so that i can move forward. I will be thankful to all of you.

    -(void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
{
    UIViewController <ZoomTransitionProtocol> * fromVC = (id)[transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    UIViewController <ZoomTransitionProtocol> *toVC = (id)[transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
    UIView * containerView = [transitionContext containerView];
    UIView * fromView = [fromVC view];
    UIView * toView = [toVC view];

    [containerView addSubview:toView];

    UIView * zoomFromView = [fromVC viewForZoomTransition];
    UIView * zoomToView = [toVC viewForZoomTransition];

//Code is continuing…

}

Answer 1

I have figured out the issue and its resolved and working perfectly.

Solution: Look into following screenshot:

You will notice that, firstly, Navigation Controller is places and then ViewController; Afterwards, a TabBarController will come; TabBarController's first item is TableViewController; When we push any view controller from any of the tabBar item, it will push because we have root navigation controller; So no need to add separate navigation controllers for each and every tab.

But UITransitionContextFromViewControllerKey will return BaseTabBar classes. So for resolve the issue, i just added a new Navigation Controller for tabBar item. Now it will return correct FromViewCotroller . Following is the correct screenshot: