Flutter 自定义一个右侧可滑动 左侧为按钮的组件

   var topicList = ["圈子话题1","圈子话题2","圈子话题3","圈子话题4-天气很好","圈子话题5","圈子话题6"];
   @override
   Widget build(BuildContext context){
     return SizedBox(
        height:40 ,
        child:
        Stack(
          children:[
            Container(
              height: 40,
              margin:  EdgeInsets.fromLTRB( 10, 0,  40, 0),
              child: SingleChildScrollView(
                scrollDirection: Axis.horizontal,
                child: Row(
                  children: [
                    for (int i = 0 ;i < topicList.length;i++)
                      //TopicItem为自定义组件
                      TopicItem(topicString: topicList[i]) ,
                  ],
                ),//Row
              ),//SingleChildScrollView
            ),//Container
            Container(
              width: 40, 
              height:40,
              margin: EdgeInsets.only(left:336),
              child: ElevatedButton(
                  onPressed: ()=>{
                     
                  },
                  style:const ButtonStyle(backgroundColor: MaterialStatePropertyAll(Colors.black)),
                  child:const Image(image: AssetImage("image/detail_cell.png"),),
               
              ),//ElevatedButton
            )//Container
          ],//children
        )//Stack
     );//SizedBox
   }

TopicItem自定义组件：

class TopicItem extends StatelessWidget{
 final String topicString;
 const TopicItem({Key? key,required this.topicString}):super(key:key);
  @override
  Widget build(BuildContext context){
     return  Card(
         child:SizedBox(
            child: Text(topicString,style:const TextStyle(fontSize: 16),),
         ),
     );
  }

}

效果如下：