fix(ios-action-bar): enable NavigationButton text change on first navigation (NativeScript#5458)

ADjenkov · web-flow · commit b878143b639d · 2018-02-28T15:36:26.000+02:00
diff --git a/tns-core-modules/ui/frame/frame.ios.ts b/tns-core-modules/ui/frame/frame.ios.ts
@@ -13,6 +13,8 @@ import * as utils from "../../utils/utils";
 
 export * from "./frame-common";
 
+const majorVersion = utils.ios.MajorVersion;
+
 const ENTRY = "_entry";
 const NAV_DEPTH = "_navDepth";
 const TRANSITION = "_transition";
@@ -88,6 +90,13 @@ export class Frame extends FrameBase {
         backstackEntry[NAV_DEPTH] = navDepth;
         viewController[ENTRY] = backstackEntry;
 
+        if (!animated && majorVersion > 10) {
+            // Reset back button title before pushing view controller to prevent
+            // displaying default 'back' title (when NavigaitonButton custom title is set).
+            let barButtonItem = UIBarButtonItem.alloc().initWithTitleStyleTargetAction("", UIBarButtonItemStyle.Plain, null, null);
+            viewController.navigationItem.backBarButtonItem = barButtonItem;
+        }
+
         // First navigation.
         if (!this._currentEntry) {
             // Update action-bar with disabled animations before the initial navigation.
