Flutter 父子组件传值
一父传子：
父中：
void onButtonChange(val1,val2,val3){
print('============================子向父传值OK了===============');
print(val1);
print(val2);
print(val3);
print('============================子向父传值OK了===============');
}
List list=[["A","A"],["X","S","W"],["H","I","O"]];
new ButtonsWidget(data3Two:list, callback: (val1,val2,val3) => onButtonChange(val1,val2,val3)),
子中：
class ButtonsWidget extends StatefulWidget {
ButtonsWidget({Key key, this.data3Two, this.callback})
:super(key: key);
final callback;
List data3Two;
@override
_ButtonsWidgetState createState() => new _ButtonsWidgetState();
}
class _ButtonsWidgetState extends State<ButtonsWidget> {
@override
Widget build(BuildContext context) {
return ViewBuild(
Container(
child: Column(
children: <Widget>[
//省略
Text(widget.data3Two[0][0])； //拿值得方法
],
),
)某工具.onTap((){
doPostAjax()
}).padding()略
);
}
void doPostAjax(){
widget.callback(_istypesA1,_istypesA2,_istypesA3);
}
}