Flutter底部不规则导航的实现过程

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),
       color: colors.white,
       onpressed: (){
        setstate(() {
         _index = 0;
        });
       },
      ),
      iconbutton(
       icon: icon(icons.airport_shuttle),
       color: colors.white,
       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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