tab bar swipe interactive transition

MVMCore/MVMCore/LoadHandling/MVMCoreLoadRequestOperation.m

@@ -867,6 +867,14 @@
     }
 }
 
+- (id <UIViewControllerInteractiveTransitioning>)navigationController:(UINavigationController *)navigationController interactionControllerForAnimationController:(id<UIViewControllerAnimatedTransitioning>)animationController {
+    if (self.delegate && [self.delegate respondsToSelector:@selector(navigationController:interactionControllerForAnimationController:)]) {
+        return [self.delegate navigationController:navigationController interactionControllerForAnimationController:animationController];
+    } else {
+        return nil;
+    }
+}
+
 - (void)viewController:(UIViewController *)presentingViewController willPresentViewController:(UIViewController *)presentedViewController {
     
     if ([self.delegate respondsToSelector:@selector(viewController:willPresentViewController:)]) {

MVMCore/MVMCore/PresentationHandling/MVMCoreNavigationHandler.m

@@ -193,6 +193,8 @@
     
     MVMCoreNavigationObject *navigationObject = [[MVMCoreNavigationObject alloc] initWithViewController:viewController navigationController:navigationController viewControllers:nil animated:animated tryToReplaceFirst:replaceInStack navigationType:NavigationTypeReplaceTop];
     [self startNavigationWithNavigationObject:navigationObject delegate:delegate completionHandler:completionBlock];
+   
+
 }
 
 - (void)replaceAfterRoot:(nonnull UIViewController *)viewController navigationController:(nullable UINavigationController *)navigationController animated:(BOOL)animated delegate:(nullable NSObject<MVMCorePresentationDelegateProtocol>*)delegate replaceInStack:(BOOL)replaceInStack completionHandler:(nullable void (^)(void))completionBlock {

MVMCore/MVMCore/PresentationHandling/MVMCoreNavigationOperation.m

@@ -106,7 +106,10 @@
                         
                         // Replaces the current view controller.
                         NSMutableArray *viewControllers = [NSMutableArray arrayWithArray:self.navigationObject.navigationController.viewControllers];
-                        [viewControllers replaceObjectAtIndex:([self.navigationObject.navigationController.viewControllers count] - 1) withObject:self.navigationObject.viewController];
+                        if (viewControllers.count > 1) {
+                            [viewControllers removeObjectAtIndex:0];
+                        }
+                        [viewControllers replaceObjectAtIndex:(viewControllers.count - 1) withObject:self.navigationObject.viewController];
                         [self setViewControllers:viewControllers];
                     } else {
                         
@@ -240,10 +243,30 @@
 
 - (nullable id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC {
     if (self.delegate && [self.delegate respondsToSelector:@selector(navigationController:animationControllerForOperation:fromViewController:toViewController:)]) {
-        return [self.delegate navigationController:navigationController animationControllerForOperation:operation fromViewController:fromVC toViewController:toVC];
+        id animatedTransitioning = [self.delegate navigationController:navigationController animationControllerForOperation:operation fromViewController:fromVC toViewController:toVC];
+        [animatedTransitioning addObserver:self forKeyPath:@"interactiveTransitionCanceled" options:NSKeyValueObservingOptionOld | NSKeyValueObservingOptionNew context:nil];
+        return animatedTransitioning;
     } else {
         return nil;
     }
 }
 
+- (nullable id <UIViewControllerInteractiveTransitioning>)navigationController:(UINavigationController *)navigationController interactionControllerForAnimationController:(id<UIViewControllerAnimatedTransitioning>)animationController {
+    if (self.delegate && [self.delegate respondsToSelector:@selector(navigationController:interactionControllerForAnimationController:)]) {
+        id interactiveTransitioning = [self.delegate navigationController:navigationController interactionControllerForAnimationController:animationController];
+        return interactiveTransitioning;
+    } else {
+        return nil;
+    }
+}
+
+- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context {
+    if ([keyPath isEqualToString:@"interactiveTransitionCanceled"]) {
+        BOOL transitionStoped = ((NSNumber*)change[NSKeyValueChangeNewKey]).boolValue;
+        if (transitionStoped) {
+            [self markAsFinished];
+        }
+    }
+}
+
 @end

MVMCore/MVMCore/PresentationHandling/MVMCorePresentationDelegateProtocol.h

@@ -24,6 +24,9 @@
                                                          fromViewController:(nonnull UIViewController *)fromVC
                                                            toViewController:(nonnull UIViewController *)toVC  NS_AVAILABLE_IOS(7_0);
 
+- (nullable id <UIViewControllerInteractiveTransitioning>)navigationController:(nonnull UINavigationController *)navigationController
+                                   interactionControllerForAnimationController:(nonnull id <UIViewControllerAnimatedTransitioning>) animationController NS_AVAILABLE_IOS(7_0);
+
 // Called when a view controller will be presented on another view controller
 - (void)viewController:(nonnull UIViewController *)presentingViewController willPresentViewController:(nonnull UIViewController *)presentedViewController;