是的，有
widget：
从文档：
> /// The current configuration.> ///> /// A [State] object's configuration is the corresponding> [StatefulWidget]> /// instance. This property is initialized by the framework before> calling> /// [initState]. If the parent updates this location in the tree to a> new> /// widget with the same [runtimeType] and [Widget.key] as the current> /// configuration, the framework will update this property to refer to> the new> /// widget and then call [didUpdateWidget], passing the old> configuration as> /// an argument.> T get widget => _widget;> T _widget;
代码如下所示：
import 'package:flutter/material.dart'; void main() => runApp(MyApp()); class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Demo', home: MyHomePage('John', 'Morison'), ); } } class MyHomePage extends StatefulWidget { MyHomePage(this.fname, this.lname); final String fname; final String lname; @override _MyHomePageState createState() => _MyHomePageState(); } class _MyHomePageState extends State<MyHomePage> { @override Widget build(BuildContext context) { return Scaffold( body: Center( child: Text('Hello ${widget.fname} ${widget.lname}'), ) ); } }
