fix(ios): ActionBar style wrong after cancelled swipe back navigation (#8252)

Alexander Vakrilov · vtrifonov · dtopuzov · dtopuzov · commit 6133d6b6bd5b · 2020-01-16T12:17:29.000+02:00
* fix(ios): ActionBar style wrong after cancelled swipe back navigation

* chore: cleanup

* remove unneeded console.log

Co-authored-by: Vasil Trifonov &lt;v.trifonov@gmail.com&gt;
Co-authored-by: Dimitar Topuzov &lt;dtopuzov@gmail.com&gt;
diff --git a/nativescript-core/ui/page/page.ios.ts b/nativescript-core/ui/page/page.ios.ts
@@ -124,6 +124,13 @@ class UIViewControllerImpl extends UIViewController {
         // Pages in backstack are unloaded so raise loaded here.
         if (!owner.isLoaded) {
             owner.callLoaded();
+        } else {
+            // Note: Handle the case of canceled backstack navigation. (https://github.com/NativeScript/NativeScript/issues/7430)
+            // In this case viewWillAppear will be executed for the previous page and it will change the ActionBar
+            // because changes happen in an interactive transition - IOS will animate between the the states.
+            // If canceled - viewWillAppear will be called for the current page(which is already loaded) and we need to
+            // update the action bar explicitly, so that it is not left styles as the previous page.
+            owner.actionBar.update();
         }
     }
 
@@ -192,7 +199,7 @@ class UIViewControllerImpl extends UIViewController {
         if (!owner) {
             return;
         }
-
+        
         // Cache presentedViewController if any. We don't want to raise
         // navigation events in case of presenting view controller.
         if (!owner._presentedViewController) {
@@ -223,7 +230,7 @@ class UIViewControllerImpl extends UIViewController {
         if (!page || page.modal || page._presentedViewController) {
             return;
         }
-
+        
         // Forward navigation does not remove page from frame so we raise unloaded manually.
         if (page.isLoaded) {
             page.callUnloaded();
