From 48942ba26b29b0552a6bbb12108e5bfe244e4dd5 Mon Sep 17 00:00:00 2001
From: Aleksey Smolsky <smolsky.aleksey@me.com>
Date: Tue, 24 Jul 2018 13:23:25 +0300
Subject: [PATCH 1/2] clear animation when flag is false

---
 MaterialControls/MaterialControls/MDRippleLayer.m | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MaterialControls/MaterialControls/MDRippleLayer.m b/MaterialControls/MaterialControls/MDRippleLayer.m
index 5d6a50b..6eef4bc 100644
--- a/MaterialControls/MaterialControls/MDRippleLayer.m
+++ b/MaterialControls/MaterialControls/MDRippleLayer.m
@@ -144,6 +144,8 @@ - (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
     } else {
       [self clearEffects];
     }
+  } else {
+      [self clearEffects];
   }
 }
 

From b5b609dfecf09c6dd86ffc9c71fd8052ba091b02 Mon Sep 17 00:00:00 2001
From: Aleksey Smolsky <smolsky.aleksey@me.com>
Date: Mon, 29 Oct 2018 14:40:33 +0300
Subject: [PATCH 2/2] fix crash [UIPageViewController
 _flushViewController:animated:]

---
 .../MaterialControls/MDRippleLayer.m          |  8 ++---
 .../MaterialControls/MDTabBarViewController.m | 34 ++++++++++---------
 2 files changed, 22 insertions(+), 20 deletions(-)

diff --git a/MaterialControls/MaterialControls/MDRippleLayer.m b/MaterialControls/MaterialControls/MDRippleLayer.m
index 6eef4bc..c073540 100644
--- a/MaterialControls/MaterialControls/MDRippleLayer.m
+++ b/MaterialControls/MaterialControls/MDRippleLayer.m
@@ -133,9 +133,9 @@ - (void)removeFromSuperlayer {
 }
 
 - (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
-  if (anim == [self animationForKey:@"opacityAnim"]) {
-    self.opacity = 0;
-  } else if (flag) {
+   if([[anim valueForKey:@"opacityAnim"] isEqual:@"opacity"]) {
+        self.opacity = 0;
+    } else if (flag) {
     if (_userIsHolding) {
       _effectIsRunning = false;
       if ([self.layerDelegate respondsToSelector:@selector(mdLayer:didFinishEffect:)]) {
@@ -326,7 +326,7 @@ - (void)clearEffects {
     opacityAnim.removedOnCompletion = false;
     opacityAnim.fillMode = kCAFillModeForwards;
     opacityAnim.delegate = self;
-
+    [opacityAnim setValue:@"opacity" forKey:@"opacityAnim"];
     [self addAnimation:opacityAnim forKey:@"opacityAnim"];
   }
 
diff --git a/MaterialControls/MaterialControls/MDTabBarViewController.m b/MaterialControls/MaterialControls/MDTabBarViewController.m
index 840bf32..d3b3d25 100644
--- a/MaterialControls/MaterialControls/MDTabBarViewController.m
+++ b/MaterialControls/MaterialControls/MDTabBarViewController.m
@@ -222,22 +222,24 @@ - (void)moveToPage:(NSUInteger)selectedIndex {
   __unsafe_unretained typeof(self) weakSelf = self;
   disableDragging = YES;
   pageController.view.userInteractionEnabled = NO;
-  [pageController
-      setViewControllers:@[ viewController ]
-               direction:animateDirection
-                animated:YES
-              completion:^(BOOL finished) {
-                weakSelf->disableDragging = NO;
-                weakSelf->pageController.view.userInteractionEnabled = YES;
-                weakSelf->lastIndex = selectedIndex;
-
-                if ([weakSelf->_delegate
-                        respondsToSelector:@selector(tabBarViewController:
-                                                           didMoveToIndex:)]) {
-                  [weakSelf->_delegate tabBarViewController:weakSelf
-                                             didMoveToIndex:selectedIndex];
-                }
-              }];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [pageController
+         setViewControllers:@[ viewController ]
+         direction:animateDirection
+         animated:NO
+         completion:^(BOOL finished) {
+             weakSelf->disableDragging = NO;
+             weakSelf->pageController.view.userInteractionEnabled = YES;
+             weakSelf->lastIndex = selectedIndex;
+
+             if ([weakSelf->_delegate
+                  respondsToSelector:@selector(tabBarViewController:
+                                               didMoveToIndex:)]) {
+                      [weakSelf->_delegate tabBarViewController:weakSelf
+                                                 didMoveToIndex:selectedIndex];
+                  }
+         }];
+    });
 }
 
 #pragma mark - PageViewController Delegate