but when I do try to set the new state, it doesn't reload the new content. If I debug the app, it shows that the current content is the new one, but after "rebuilding" the whole widget, it doesn't show the new info.
flutter足够聪明，可以重建widget。据我所知，当我们调用setState()时，它将重新执行build方法。但只有标...
把它放在initState()方法的上面或下面，并在IconButton的onPressed回调中调用它。x一个一个一个一个x一...
// BAD: DO NOT DO THISvoidmyTapHandler(){varcartWidget=somehowGetMyCartWidget();cartWidget.updateWith(item);} 即使你实现了上面的代码,也得处理 MyCart widget 中的代码: // BAD: DO NOT DO THISWidgetbuild(BuildContext context){returnSomeWidget(// The initial state of the cart.);}voidupdate...
Flutter Not Calling Build in a Widget After setState() Despite a Change in State Ask Question Asked 10 months ago Modified 10 months ago Viewed 183 times Report this ad1 I have called setState() to update the objects of the class MyErrorBox, but Flutter does not run...
returnshouldBuild(context);});}WidgetshouldBuild(BuildContext context);booluseSubstance()=>false;Tsubstance()=>null;voidreload([VoidCallback fn]){if(!mounted)return;setState((){_isShouldBuild=true;if(fn!=null){fn();}});}@overridevoiddispose(){super.dispose();debugPrint("XCState dispose...
Widget Tree:为Element描述需要的配置,调用createElement方法创建Element,决定Element是否需要更新。Flutter通过查分算法比对Widget树前后的变化,来决定Element的State是否改变。 Element Tree:表示Widget Tree特定位置的一个实例,调用createRenderObject创建RenderObject,同时持有Widget和RenderObject,负责管理Widget的配置和RenderObjec的...
Widget Tree:为Element描述需要的配置,调用createElement方法创建Element,决定Element是否需要更新。Flutter通过查分算法比对Widget树前后的变化,来决定Element的State是否改变。 Element Tree:表示Widget Tree特定位置的一个实例,调用createRenderObject创建RenderObject,同时持有Widget和RenderObject,负责管理Widget的配置和RenderObjec的...
Thankfully no again and again rebuilding of the whole widget.No matter the widget which is wrapped under the Stateful Builder is in Stateless or stateful Widget. Now question arising is we know Stateless Widget it can’t rebuild until it gets a new instance. ( SetState is not working)...
setState on parent does not update the dialog. I am trying to implement video_player and the full screen player will be inside a custom dialog. When the video is loading the thumbnail is shown inside a rotated widget in a dialog to mimic full screen on landscape The video size is calcul...