Tabs 带有子选项卡的颤振Appbar(动作)
我是个新手,不知你能否帮我找到解决问题的办法 我有一个带有选项卡视图的脚手架,我想在主appbar中创建一个过滤器(操作按钮)来管理选项卡 main和child都是statefulwidget 以下是我的主页代码:Tabs 带有子选项卡的颤振Appbar(动作),tabs,dart,flutter,appbar,flutter-appbar,Tabs,Dart,Flutter,Appbar,Flutter Appbar,我是个新手,不知你能否帮我找到解决问题的办法 我有一个带有选项卡视图的脚手架,我想在主appbar中创建一个过滤器(操作按钮)来管理选项卡 main和child都是statefulwidget 以下是我的主页代码: Widget body = TabBarView( controller: tabController, children: <Widget>[ new First(filter: filter), new Seco
Widget body = TabBarView(
controller: tabController,
children: <Widget>[
new First(filter: filter),
new Second(filter: filter);
new Third(filter: filter);
],
);
return Scaffold(
appBar: AppBar(
actions:[IconButton(icon: Icon(MdiIcons.filter),onPressed:
() {
// Send info to child
})],
bottom: new TabBar(
controller: tabController,
tabs: <Tab>[
new Tab(text:"Tab1"),
new Tab(text:"Tab2"),
new Tab(text:"Tab3")
],
body: new Builder(builder: (BuildContext context) {
_scaffoldContext = context;
return body;
}));
));
我不知道将appbar的操作放在哪里,以便从主页上更改孩子身体上的文本。我找到了解决方案,将我的父窗口小部件作为继承窗口小部件,这样我就可以从孩子那里访问它的数据 下面是一个例子:
class MyStatefulWidget extends StatefulWidget{
@override
MyStatefulWidgetState createState() => MyStatefulWidgetState();
static MyStatefulWidgetState of(BuildContext context){
return (context.inheritFromWidgetOfExactType(_MyInheritedStateContainer) as _MyInheritedStateContainer).data;
}
}
class MyStatefulWidgetState extends State<MyStatefulWidget>{
String variableCalledHello = "Hello World";
@override
void initState() {
super.initState();
}
@override
Widget build(BuildContext context) {
return new _MyInheritedStateContainer(data:this,child:/* Body here */);
}
}
class _MyInheritedStateContainer extends InheritedWidget{
_MyInheritedStateContainer({
Key key,
@required Widget child,
@required this.data,
}) : super(key: key, child: child);
final MyStatefulWidgetState data;
@override
bool updateShouldNotify(_MyInheritedStateContainer oldWidget) {
return true;
}
}
@override
Widget build(BuildContext context) {
MyStatefulWidgetState state = MyStatefulWidgetState.of(context);
print(state.variableCalledHello);
return /* Container ... */;
}
希望这能帮助某人解决他的问题
谢谢。你的-First(filter:filter)是什么?First(filter:filter)是第一个子项(Tab)
类First extensed StatefulWidget{final String filter;First({Key-Key,@required this.filter}):super(Key:Key);@override FirstState createState()=>FirstState();}
您想发送什么信息?我想从主视图(选项卡视图)中的alertdialog发送信息(在本例中为字符串)。AlertDialog来自主脚手架。我所做的是更新字符串并将其发送到tab,但无法刷新tab以显示新值
@override
Widget build(BuildContext context) {
MyStatefulWidgetState state = MyStatefulWidgetState.of(context);
print(state.variableCalledHello);
return /* Container ... */;
}