微信小程序 实现列表项滑动显示删除按钮的功能

微信小程序 实现列表项滑动显示删除按钮的功能

微信小程序并没有提供列表控件，所以也没有ios上惯用的列表项左滑删除的功能，so只能自己干了。

原理很简单，用2个层，上面的层显示正常的内容，下面的层显示一个删除按钮，就是记录手指滑动的距离，动态的来移动上层元素，当然上层用绝对定位。

wxml：

<view class="container">
 <view class="record-box" data-datetime="{{record.datetime}}" wx:for="{{detaillist}}" wx:for-item="record">
  <view class="record" style="left:{{record.offsetx}}px" bindtouchstart="recordstart" catchtouchmove="recordmove" bindtouchend="recordend">
   <view class="left">
    <view>{{record.type}} {{record.count+record.unit}}</view>
    <view class="summary">{{record.remark}}</view>
   </view>
   <view class="right">
    {{record.datetime}}
   </view>
  </view>
  <view class="delete-box">
   <view>删除</view>
  </view>
 </view>
</view>

　wxss：

@import "../common/weui.wxss";
 
.container {
 box-sizing: border-box;
 padding: 0 0 0 0;
}
 
 
 
.record {
 display: flex;
 flex-direction: row;
 align-items: center;
 width:100%;
  height: 120rpx;
 position: absolute;
 justify-content: space-between;
 background-color: #fff;
}
 
.record .right{
 margin-right: 30rpx;
   color: #888888;
}
.record .left{
 margin-left: 30rpx;
  display: flex;
  flex-direction: column;
 justify-content: space-between;
}
 
.record .left .summary{
  color: #aaa;
 font-size: 30rpx;
 line-height: 30rpx;
 
}
 
.record-box{
 height: 120rpx;
 width: 100%;
 border-bottom: 1rpx solid #ddd;
 background-color: #fff;
}
 
.delete-box{
 background-color: #e64340;
 color: #ffffff;
 float: right;
 height: 100%;
 width: 80px;
 display: flex;
 align-items: center;
 justify-content: center;
}
 
.record-box:last-child {
 border-bottom: 0;
}
 
.record .r-item {
  
}
　　

js代码：

var detaillist = [
  { datetime: '2017-01-01 17:00', count: 100, unit: 'ml', type: '开水', remark: '哈哈哈哈' },
  { datetime: '2017-01-01 17:01', count: 100, unit: 'ml', type: '开水' },
  { datetime: '2017-01-01 17:02', count: 100, unit: 'ml', type: '开水' }
];
var recordstartx = 0;
var currentoffsetx = 0;
page(
  {
    data: {
      detaillist: detaillist
    }
    ,
    recordstart: function (e) {
      recordstartx = e.touches[0].clientx;
      currentoffsetx = this.data.detaillist[0].offsetx;
      console.log('start x ', recordstartx);
    }
    ,
    recordmove: function (e) {
      var detaillist = this.data.detaillist;
      var item = detaillist[0];
      var x = e.touches[0].clientx;
      var mx = recordstartx - x;
      console.log('move x ', mx);

      var result = currentoffsetx - mx;
      if (result >= -80 && result <= 0) {
        item.offsetx = result;
      }
      this.setdata({
        detaillist: detaillist
      });
    }
    ,
    recordend: function (e) {
      var detaillist = this.data.detaillist;
      var item = detaillist[0];
      console.log('end x ', item.offsetx);

      if (item.offsetx < -40) {
        item.offsetx = -80;

      } else {
        item.offsetx = 0;

      }
      this.setdata({
        detaillist: detaillist
      });
    }

  }
);

感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！