release 0.6.0

Author: chenenyu

CHANGELOG.md

@@ -1,3 +1,7 @@
+## [0.6.0] - 2022/07/01.
+
+* Fix issue #23.
+
 ## [0.5.0] - 2022/05/16.
 
 * Flutter 3.

lib/src/lifecycle_observer.dart

@@ -13,7 +13,7 @@ class LifecycleObserver extends NavigatorObserver with WidgetsBindingObserver {
   static final List<LifecycleObserver> _cache = [];
 
   /// Avoid calling this constructor in [build] method.
-  /// Call [dispose] when you will never use it.
+  /// Call [dispose] when it will never be used, e.g. call it in State#dispose.
   LifecycleObserver() {
     _cache.add(this);
     WidgetsBinding.instance.addObserver(this);
@@ -23,16 +23,12 @@ class LifecycleObserver extends NavigatorObserver with WidgetsBindingObserver {
   @protected
   factory LifecycleObserver.internalGet(BuildContext context) {
     NavigatorState navigator = Navigator.of(context);
-    LifecycleObserver? targetObserver;
     for (int i = _cache.length - 1; i >= 0; i--) {
       LifecycleObserver observer = _cache[i];
       if (observer.navigator == navigator) {
-        targetObserver = observer;
+        return observer;
       }
     }
-    if (targetObserver != null) {
-      return targetObserver;
-    }
     throw Exception(
         'Can not get associated LifecycleObserver, did you forget to register it in MaterialApp or Navigator?');
   }

pubspec.yaml

@@ -1,6 +1,6 @@
 name: lifecycle
 description: Lifecycle support for Flutter widgets.
-version: 0.5.0
+version: 0.6.0
 homepage: https://github.com/chenenyu/lifecycle
 
 environment: