如何将绿色字符串从HomePage页面发送到ContaPage页面？
我认为它是如此Navigator.of(context).pushNamed(‘/ conta / green’);但我不知道如何进入页面中的绿色字符串
因此,通过获取字符串的值,我可以例如更改ContaPage中appBar的backgroundColor的颜色.
main.dart
import "package:flutter/material.dart";
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: "MyApp",home: new HomePage(),routes: <String,WidgetBuilder> {
'/home': (BuildContext context) => new HomePage(),'/conta': (BuildContext context) => new ContaPage()
},);
}
}
class HomePage extends StatelessWidget {
@override
Widget build(BuildContext context) => new Scaffold(
appBar: new AppBar(
backgroundColor: new Color(0xFF26C6DA),),body: new ListView (
children: <Widget>[
new FlatButton(
child: new Text("ok"),textColor: new Color(0xFF66BB6A),onPressed: () {
Navigator.of(context).pushNamed('/conta');
},],)
);
}
class ContaPage extends StatelessWidget {
@override
Widget build(BuildContext context) => new Scaffold(
appBar: new AppBar(
backgroundColor: new Color(0xFF26C6DA),);
}
解决方法
您可以根据需要创建MaterialPageRoute并将参数传递给ContaPage构造函数.
import "package:flutter/material.dart";
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: "MyApp",onPressed: () {
Navigator.push(context,new MaterialPageRoute(
builder: (BuildContext context) => new ContaPage(new Color(0xFF66BB6A)),));
},)
);
}
class ContaPage extends StatelessWidget {
ContaPage(this.color);
final Color color;
@override
Widget build(BuildContext context) => new Scaffold(
appBar: new AppBar(
backgroundColor: color,);
}
