FloatingActionButton 实现类似 闲鱼 App 底部导航凸起按钮

案例代码

floatingActionButton: Column(
  mainAxisAlignment: MainAxisAlignment.end,
  children: <Widget>[
    Container(
      margin: EdgeInsets.only(bottom: 1),
      child: FloatingActionButton(
        child: Icon(Icons.add),
        onPressed: () {},
      ),
    ),
    Container(
      margin: EdgeInsets.only(bottom: 5),
      child: Text(‘发布‘, style: TextStyle( color: Colors.grey, fontSize: 13),),
    ),
  ],
),
floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,