fix: view controller containment

Author: michaelochs

ViewDeck/IIViewDeckController.m

@@ -3007,7 +3007,6 @@ - (void)setController:(UIViewController *)controller forSide:(IIViewDeckSide)sid
         if (currentSide != IIViewDeckNoSide) _controllers[currentSide] = nil;
         [prevController setViewDeckController:nil];
         [prevController removeFromParentViewController];
-        [prevController didMoveToParentViewController:nil];
     }
 
     // make the switch
@@ -3020,12 +3019,10 @@ - (void)setController:(UIViewController *)controller forSide:(IIViewDeckSide)sid
     if (controller) {
         // and finish the transition
         void(^finishTransition)(void) = ^{
-            UIViewController* parentController = [[self parentViewController] parentViewController] ?: [self presentingViewController] ?: self;
-            
-            [parentController addChildViewController:controller];
+            [self addChildViewController:controller];
             [controller setViewDeckController:self];
             afterBlock(controller);
-            [controller didMoveToParentViewController:parentController];
+            [controller didMoveToParentViewController:self];
             [self applyCenterViewOpacityIfNeeded];
         };
 
@@ -3141,9 +3138,7 @@ - (void)setCenterController:(UIViewController *)centerController {
         @catch (NSException *exception) {}
         [_centerController setViewDeckController:nil];
         [_centerController removeFromParentViewController];
-
 
-        [_centerController didMoveToParentViewController:nil];
         II_RELEASE(_centerController);
     }
 
@@ -3152,7 +3147,6 @@ - (void)setCenterController:(UIViewController *)centerController {
 
     if (_centerController) {
         II_RETAIN(_centerController);
-        [_centerController willMoveToParentViewController:self];
         [self addChildViewController:_centerController];
         [_centerController setViewDeckController:self];
         [_centerController addObserver:self forKeyPath:@"title" options:0 context:nil];
@@ -3278,7 +3272,7 @@ - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(N
 #pragma mark - transition blocks
 
 - (void)enqueueFinishTransitionBlock:(void(^)(void))finishTransition forController:(UIViewController*)controller {
-    [controller willMoveToParentViewController:self];
+    [self addChildViewController:controller];
     if (self.referenceView) {
         finishTransition();
     }