相关疑难解决方法(0)

所以我有一个继承的小部件，如下所示：

class InheritedStateWidget extends StatefulWidget {
  final Widget child;

  InheritedStateWidget({
    @required this.child
  });

  @override
  InheritedStateWidgetState createState() => new InheritedStateWidgetState();

  static of(BuildContext context) {
    return (context.inheritFromWidgetOfExactType(_MyInheritedWidget) as _MyInheritedWidget).data;
  }
}

class InheritedStateWidgetState extends State<InheritedStateWidget> {
  String _userName;

  // Getter methods
  String get tasks => _userName;

  void changeUserName(String name) {
    setState(() {
      _userName = name;      
    });
  }
  @override
  Widget build(BuildContext context) {
    return new _MyInheritedWidget(
      data: this,
      child: widget.child,
    );
  }

}

class _MyInheritedWidget extends InheritedWidget {
  final InheritedStateWidgetState data;

  _MyInheritedWidget({
    Key …