微信小程序如何实现手指拖动选项排序

<view>
 <view class="dileititle">手指移动选项排序</view>
 <view  id="movebox">
 <block wx:for="{{list}}" wx:key="index">
 <view catchtouchmove="listitemmove" catchtouchend="listitemmove" data-index="{{index}}" class="flex1 dileiitemlist" id="movelist{{index}}" >
 <view class="{{moveoutindex==index&#63;'changemovenow':''}}" ></view>
 <view class="ranknum">{{index+1}}</view>
 <view class="flex1" >
 <view >{{item.member.nickname}}</view>
 </view>
 </view>
 </block>
 </view>
</view>
<button class='tijiao' catchtap="lastsubmit">确定</button>

let app = getApp()
app.unitgameinfo = {"members":[{"member":{"nickname":"小程序照片合成","job":"ckext"},},{"member":{"nickname":"高球丸子"},},{"member":{"nickname":"DRobertdsf","job":"黄金"},},{"member":{"nickname":"erer","job":"ckext"},},{"member":{"nickname":"just do it","job":"黄金"},},{"member":{"nickname":"888"},}],};
Page({
 data: {
 },
 onLoad: function (options) {
 var info = app.unitgameinfo,list;
 list = info.members;
 this.setData({options,info,list});
 this.getwxmlcode("#movebox",(resp)=>{
 this.setData({movebox:resp})
 setTimeout(()=>{this.getwxmlcode("#movelist0",(res)=>{
 this.setData({movelist0:res})
 var jiange = res.top-resp.top;
 var yiban = res.bottom - res.top + jiange;
 this.setData({
  itemheight:res.bottom - res.top,
  jiange:yiban, //两条中间到另一条的距离
  jianqu:resp.top-(res.bottom - res.top)/2, //位置要减去距离
 })
 })},300)
 })
 
 },
 getwxmlcode(str,cal){
 const query1 = wx.createSelectorQuery()
 query1.select(str).boundingClientRect()
 query1.selectViewport().scrollOffset()
 query1.exec((res) => {
 if(cal) cal(res[0])
 })
 },
 listitemmove(e){
 // console.log(e)
 if(e.type=="touchmove"){
 var movetop = e.touches[0].pageY-this.data.itemheight;
 var moveoutindex = parseInt((movetop-this.data.jianqu)/this.data.jiange);
 if(e.currentTarget.dataset.index<=moveoutindex) moveoutindex++;
 this.moveoutindex = moveoutindex;
 this.setData({nowmoveindex:e.currentTarget.dataset.index,movetop,moveoutindex})
 }else{
 let index = e.currentTarget.dataset.index,score = this.data.list;
 let data = {...score[index]};
 score.splice(index,1);
 if(index<=this.moveoutindex-1) this.moveoutindex--;
 score.splice(this.moveoutindex,0,data);
 this.setData({list:score,moveoutindex:-1,nowmoveindex:-1});
 }
 },
 onShow: function(){
 },
 lastsubmit(){
 console.log(this.data.list)
 },
 
})

page{background-color: #fff;font-size:30rpx;text-align: center;color: #2952a5;}
.tijiao{
 color: #fff;font-size: 30rpx;line-height: 2.8;
 margin: 20rpx auto 20rpx;width:80vw;position: fixed;bottom: 50rpx;left: 10vw;
 background-color: #2952a5;border-radius:50rpx;
}
.dileiitemlist{justify-content: center;padding-top:30rpx;flex-wrap: wrap;}
.dileititle{font-size: 32rpx;line-height: 100rpx;}
.ranknum{width:60rpx;height: 60rpx;line-height: 60rpx;text-align: center;border-radius:50%;border:1rpx solid #2952a5;margin-right:30rpx;}
.changemovenow{width:100%;height:60px!important;}
.flex1{display:flex;align-items:center;}