fixed issue where TabBar line was incorrectly animating during transition

Motion @ d3b27d75

-Subproject commit 2f4fb2859d7ed9ec05dca5221710d3e4cc46d410
+Subproject commit d3b27d7597ecd9e035e7f477513c7f43cea24c5c

Sources/iOS/TabBar.swift

@@ -546,8 +546,9 @@ fileprivate extension TabBar {
       return
     }
     
-    guard !(false == _delegate?._tabBar(tabBar: self, shouldSelect: tabItem)) else { return }
-    
+    guard !(false == _delegate?._tabBar(tabBar: self, shouldSelect: tabItem)) else {
+      return
+    }
     
     animate(to: tabItem, isTriggeredByUserInteraction: true)
   }
@@ -604,15 +605,15 @@ fileprivate extension TabBar {
                  .size(width: tabItem.bounds.width, height: lineHeight),
                  .position(x: tabItem.center.x, y: .bottom == lineAlignment ? scrollView.bounds.height - lineHeight / 2 : lineHeight / 2),
                  .completion({ [weak self, isTriggeredByUserInteraction = isTriggeredByUserInteraction, tabItem = tabItem, completion = completion] in
-                  guard let s = self else {
-                    return
-                  }
+                    guard let `self` = self else {
+                      return
+                    }
                   
-                  if isTriggeredByUserInteraction {
-                    s.delegate?.tabBar?(tabBar: s, didSelect: tabItem)
-                  }
-                  
-                  completion?(tabItem)
+                    if isTriggeredByUserInteraction {
+                      self.delegate?.tabBar?(tabBar: self, didSelect: tabItem)
+                    }
+    
+                    completion?(tabItem)
                  }))
     
     updateScrollView()

Sources/iOS/TabsController.swift

@@ -230,7 +230,7 @@ fileprivate extension TabsController {
     }
     
     super.transition(to: viewController) { [weak self, viewController = viewController, completion = completion] (isFinishing) in
-      guard let s = self else {
+      guard let `self` = self else {
         return
       }
       
@@ -241,7 +241,7 @@ fileprivate extension TabsController {
       completion?(isFinishing)
       
       if isTriggeredByUserInteraction {
-        s.delegate?.tabsController?(tabsController: s, didSelect: viewController)
+        self.delegate?.tabsController?(tabsController: self, didSelect: viewController)
       }
     }
   }
@@ -412,21 +412,14 @@ extension TabsController {
       }
     }
     
-    Motion.async { [weak self] in
-      guard let s = self else {
+    transition(to: viewControllers[index], isTriggeredByUserInteraction: isTriggeredByUserInteraction) { [weak self] (isFinishing) in
+      guard isFinishing else {
         return
       }
       
-      s.tabBar.select(at: index)
-      
-      s.transition(to: s.viewControllers[index], isTriggeredByUserInteraction: isTriggeredByUserInteraction) { [weak self] (isFinishing) in
-        guard isFinishing else {
-          return
-        }
-        
-        self?.selectedIndex = index
-      }
+      self?.selectedIndex = index
     }
+    
     return true
   }
 }
@@ -434,7 +427,6 @@ extension TabsController {
 extension TabsController: _TabBarDelegate {
   @objc
   func _tabBar(tabBar: TabBar, shouldSelect tabItem: TabItem) -> Bool {
-    
     guard let i = tabBar.tabItems.index(of: tabItem) else {
       return false
     }