protect null pointer exception

dc9bd7ff · Yacumima · ae2c03fe · dc9bd7ff
Commit dc9bd7ff authored Mar 18, 2019 by Yacumima
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Showing with 2 additions and 2 deletions

lib/container/boost_container.dart lib/container/boost_container.dart +2 -2

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--- a/lib/container/boost_container.dart
+++ b/lib/container/boost_container.dart
@@ -149,13 +149,13 @@ class BoostContainerState extends NavigatorState {
  @override
  void didUpdateWidget(Navigator oldWidget) {
    super.didUpdateWidget(oldWidget);
-    findContainerNavigatorObserver(oldWidget).removeBoostNavigatorObserver(
+    findContainerNavigatorObserver(oldWidget)?.removeBoostNavigatorObserver(
        FlutterBoost.containerManager.navigatorObserver);
  }

  @override
  void dispose() {
-    findContainerNavigatorObserver(widget).removeBoostNavigatorObserver(
+    findContainerNavigatorObserver(widget)?.removeBoostNavigatorObserver(
        FlutterBoost.containerManager.navigatorObserver);
    super.dispose();
  }