路由跳转,传值,返回上一级页面

直接跳转
Navigator.of(context).push(//跳转页面 ios是push
MaterialPageRoute(builder: (BuildContext context) {
return SearchPage();
})
);
跳转且传值
MaterialPageRoute(builder: (BuildContext context) {
return NewsPage(titleStr: "我的传值", aid: 1,);
})

import 'package:flutter/material.dart';

class NewsPage extends StatefulWidget {
final String titleStr;//传值参数
final int aid;
const NewsPage({super.key,this.titleStr = "新闻",required this.aid });//required表明必须传

@override
State<NewsPage> createState() => _NewsPageState();
}

class _NewsPageState extends State<NewsPage> {
@override
void initState() {
// TODO: implement initState
super.initState();

print("aid = ${widget.aid}");

}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar:
AppBar(
title: Text(widget.titleStr),//获取传值
),
body: Center(
child:
Text("新闻页面"),
),
);
}
}
import 'package:flutter/material.dart';

class NewsPage extends StatefulWidget {
final String titleStr;//传值参数
final int aid;
const NewsPage({super.key,this.titleStr = "新闻",required this.aid });//required表明必须传

@override
State<NewsPage> createState() => _NewsPageState();
}

class _NewsPageState extends State<NewsPage> {
@override
void initState() {
// TODO: implement initState
super.initState();

print("aid = ${widget.aid}");

}
@override
Widget build(BuildContext context) {
return Scaffold(
floatingActionButton: FloatingActionButton(onPressed: (){
//返回上一级页面
Navigator.pop(context);
}),
appBar:
AppBar(
title: Text(widget.titleStr),//获取传值
),
body: Center(
child:
Text("新闻页面"),
),
);
}
}