flutter中的BottomSheet底部菜单列表

showModalBottomSheet方法可以弹出一个Material风格的底部菜单列表模态对话框，示例如下：

Future __showModalBottomSheet(){
   return showModalBottomSheet(
     context:context,
     builder:(BuildContext context){
       return Container(
         height: 200.0,
         child: Column(
           children: <Widget>[
             ListTile(
               title: Text('选项1'),
               onTap: (){
                 Navigator.pop(context,'选项1');
               },
             ),
             ListTile(
               title: Text('选项2'),
               onTap: (){
                 Navigator.pop(context,'选项2');
               },
             ),
             ListTile(
               title: Text('选项3'),
               onTap: (){
                 Navigator.pop(context,'选项3');
               },
             ),
           ],
         ),
       );
     }
   );
 }

点击按钮，弹出该对话框：

RaisedButton(
  child: Text('showModalBottomSheet部件,'),
  onPressed:() async {
    var action=await __showModalBottomSheet();
    print(action);
  },
),

运行后效果

原文链接：https://book.flutterchina.club/chapter7/dailog.html