前言

本文主要介绍的是关于Flutter实现底部不规则导航的相关内容，分享出来供大家参考学习，下面话不多说了，来一起看看详细的介绍吧

实现方法：

1、main.dart文件

import 'package:flutter/material.dart';
import 'bootom_appBar.dart';

void main () =>runApp(MyApp());

class MyApp extends StatelessWidget {

 @override
 Widget build(BuildContext context) {
 return MaterialApp(
  title:'不规则底部导航',//自定义主题样本
  theme:ThemeData(
   primarySwatch:Colors.lightBlue
  ),home:BottomAppBarDemo(),);
 }
}

2、bootom_appBar.dart

import 'package:flutter/material.dart';
import 'each_view.dart';

class BottomAppBarDemo extends StatefulWidget {
 @override
 _BottomAppBarDemoState createState() => _BottomAppBarDemoState();
}

class _BottomAppBarDemoState extends State<BottomAppBarDemo> {
 List<Widget> _eachView;
 int _index = 0;
 @override
 void initState() {
  _eachView = List();
  _eachView ..add(EachView('主页的页面'));
  _eachView ..add(EachView('副页的页面'));
  // TODO: implement initState
  super.initState();
 }
 @override
 Widget build(BuildContext context) {
  return Scaffold(
   //变换页面
   body: _eachView[_index],floatingActionButton: FloatingActionButton(
    onPressed: (){
     Navigator.of(context).push(MaterialPageRoute(builder: (BuildContext context){
      return EachView('新添加的页面');
     }));
    },tooltip: '添加',child: Icon(
     Icons.add,color: Colors.white,),floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,bottomNavigationBar: BottomAppBar(
    //工具栏比NavigationBar灵活
    color: Colors.lightBlue,//与fab融合
    //圆形缺口
    shape: CircularNotchedRectangle(),child: Row(
     mainAxisSize: MainAxisSize.max,mainAxisAlignment: MainAxisAlignment.spaceAround,children: <Widget>[
      IconButton(
       icon: Icon(Icons.home),onPressed: (){
        setState(() {
         _index = 0;
        });
       },IconButton(
       icon: Icon(Icons.airport_shuttle),onPressed: (){
        setState(() {
         _index = 1;
        });
       },)
     ],);
 }
}

3、each_view.dart

import 'package:flutter/material.dart';

class EachView extends StatefulWidget {
 String _title;
 EachView(this._title);
 @override
 _EachViewState createState() => _EachViewState();
}

class _EachViewState extends State<EachView> {
 @override
 Widget build(BuildContext context) {
  return Scaffold(
   appBar: AppBar(title: Text(widget._title),body: Center(child: Text(widget._title),);
 }
}

4、效果展示

总结

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