Fixed now will iter to find the (FlipboardNavigationController) parentviewcontroller

Classes/FlipBoardNavigationController.m

@@ -121,6 +121,7 @@ - (void) popViewControllerWithCompletion:(FlipBoardNavigationControllerCompletio
 
     UIViewController *currentVC = [self currentViewController];
     UIViewController *previousVC = [self previousViewController];
+
     [previousVC viewWillAppear:NO];
     [UIView animateWithDuration:kAnimationDuration delay:kAnimationDelay options:0 animations:^{
         currentVC.view.frame = CGRectOffset(self.view.bounds, self.view.bounds.size.width, 0);
@@ -130,6 +131,7 @@ - (void) popViewControllerWithCompletion:(FlipBoardNavigationControllerCompletio
         _blackMask.alpha = 0.0;
     } completion:^(BOOL finished) {
         if (finished) {
+            [currentVC.view removeFromSuperview];
             [currentVC willMoveToParentViewController:nil];
             [self.view bringSubviewToFront:[self previousViewController].view];
             [currentVC removeFromParentViewController];
@@ -228,7 +230,7 @@ - (BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecogn
 #pragma mark - Handle Panning Activity
 - (void) gestureRecognizerDidPan:(UIPanGestureRecognizer*)panGesture {
     if(_animationInProgress) return;
-
+    
     CGPoint currentPoint = [panGesture translationInView:self.view];
     CGFloat x = currentPoint.x + _panOrigin.x;
 
@@ -245,6 +247,7 @@ - (void) gestureRecognizerDidPan:(UIPanGestureRecognizer*)panGesture {
 
     UIViewController * vc ;
     vc = [self currentViewController];
+    [vc viewWillDisappear:YES];
     offset = CGRectGetWidth(vc.view.frame) - x;
 
     _percentageOffsetFromLeft = offset/[self viewBoundsWithOrientation:self.interfaceOrientation].size.width;
@@ -255,7 +258,7 @@ - (void) gestureRecognizerDidPan:(UIPanGestureRecognizer*)panGesture {
         // If velocity is greater than 100 the Execute the Completion base on pan direction
         if(abs(vel.x) > 100) {
             [self completeSlidingAnimationWithDirection:panDirection];
-        }else { 
+        }else {
             [self completeSlidingAnimationWithOffset:offset];
         }
     }
@@ -275,6 +278,7 @@ - (void) completeSlidingAnimationWithDirection:(PanDirection)direction {
     if(direction==PanDirectionRight){
         [self popViewController];
     }else {
+        [[self currentViewController] viewDidAppear:YES];
         [self rollBackViewController];
     }
 }
@@ -285,6 +289,7 @@ - (void) completeSlidingAnimationWithOffset:(CGFloat)offset{
     if(offset<[self viewBoundsWithOrientation:self.interfaceOrientation].size.width/2) {
          [self popViewController];
     }else {
+        [[self currentViewController] viewDidAppear:YES];
         [self rollBackViewController];
     }
 }
@@ -328,16 +333,17 @@ @implementation UIViewController (FlipBoardNavigationController)
 - (FlipBoardNavigationController *)flipboardNavigationController
 {
 
-    if([self.parentViewController isKindOfClass:[FlipBoardNavigationController class]]){
-        return (FlipBoardNavigationController*)self.parentViewController;
-    }
-    else if([self.parentViewController isKindOfClass:[UINavigationController class]] &&
-            [self.parentViewController.parentViewController isKindOfClass:[FlipBoardNavigationController class]]){
-        return (FlipBoardNavigationController*)[self.parentViewController parentViewController];
-    }
-    else{
-        return nil;
+    UIViewController *iter = self.parentViewController;
+    while (iter) {
+        if ([iter isKindOfClass:[FlipBoardNavigationController class]]) {
+            return (FlipBoardNavigationController *)iter;
+        } else if (iter.parentViewController && iter.parentViewController != iter) {
+            iter = iter.parentViewController;
+        } else {
+            iter = nil;
+        }
     }
+    return nil;
 
 }