flutte的替换路由

Navigator.of(context).pushReplacementNamed('/from');


Navigator.of(context).pop();

import 'package:flutter/material.dart';
import './Cate.dart';
import './User.dart';
import './Home.dart';


class Tabs extends StatefulWidget {
  final index;
  Tabs({Key key,this.index = 0}):super(key: key);
  @override
  _TabsState createState() => _TabsState(this.index);
}

class _TabsState extends State<Tabs> {
  int currentIndex;
  _TabsState(index){
    this.currentIndex = index;
  }
 List _pageList = [
   Home(),Cate(),User()
 ];


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: this._pageList[currentIndex],
      bottomNavigationBar:BottomNavigationBar(
        currentIndex: this.currentIndex,
        onTap: (int index){
          setState(() {
            this.currentIndex = index;
          });
        },
        items: [
          BottomNavigationBarItem(
            icon: Icon(Icons.home),
            title: Text('首页')
          ),
          BottomNavigationBarItem(
              icon: Icon(Icons.home),
              title: Text('首页')
          ),
          BottomNavigationBarItem(
              icon: Icon(Icons.home),
              title: Text('首页')
          )
        ],

      ),
    );
  }
}
跳转到指定的 tab页面
 Navigator.of(context).pushAndRemoveUntil(
                      new MaterialPageRoute(builder:(context)=>new Tabs(index:1)), (route) => route == null);