列表滑动删除

<template>
  <view class="container">
    <view v-for="(item,index) in chatList" :key="index" :class="['touch-item', item.isTouchMove ? 'touch-move-active' : '']"
	 @touchstart="touchstart($event)" @touchmove="touchmove(index, $event)">
	 <!-- content就是选中的这个元素 -->
      <view class="content">
	  {{item.content}}
	  <view>{{new Date().toLocaleString()}}</view>
	  </view>
		<view class="del" @tap="del(index)">
		  <!-- 删除 -->
		  <uni-icons type="trash" size="30" color="white" ></uni-icons>
		</view>
	</view>
  </view>
</template>

<script>
export default {
  data() {
    return {
       chatList: [],
       startX: 0, //开始坐标
       startY: 0
    }
  },
  onLoad() {
    let arr = [];
    for (var i = 0; i < 10; i++) {
      arr.push({
        content: i + " 向左滑动删除-<<",
        isTouchMove: false //默认全隐藏删除
      })
    }
   this.chatList = arr;
  },
  methods: {
     //手指触摸动作开始 记录起点X坐标
    touchstart: function (target) {
      //开始触摸时 重置所有删除
      this.chatList.forEach( (v, i) => {
        if (v.isTouchMove)//只操作为true的
          v.isTouchMove = false;
      })
      this.startX = target.changedTouches[0].clientX;
      this.startY = target.changedTouches[0].clientY;
    },
     //滑动事件处理
    touchmove: function (indexNum, target) {
      let that = this,
      index = indexNum,//当前索引
      startX = that.startX,//开始X坐标
      startY = that.startY,//开始Y坐标
      touchMoveX = target.changedTouches[0].clientX,//滑动变化坐标
      touchMoveY = target.changedTouches[0].clientY,//滑动变化坐标
      //获取滑动角度
      angle = that.angle({ X: startX, Y: startY }, { X: touchMoveX, Y: touchMoveY });
      // console.log("大街街道",angle)
	  that.chatList.forEach(function (v, i) {
        v.isTouchMove = false
        //滑动超过30度角 return
        if (Math.abs(angle) > 15) return;
        if (i == index) {
          if (touchMoveX > startX) //右滑
          v.isTouchMove = false
          else //左滑
          v.isTouchMove = true
        }
      })
    },
    /**
      * 计算滑动角度
      * @param {Object} start 起点坐标
      * @param {Object} end 终点坐标
      */
    angle: function (start, end) {
      var _X = end.X - start.X,
      _Y = end.Y - start.Y
      //返回角度 /Math.atan()返回数字的反正切值
      return 360 * Math.atan(_Y / _X) / (2 * Math.PI);
    },
     //删除事件
    del: function (index) {
      this.chatList.splice(index, 1);
    }
  }
}
</script>
 

<style>
.touch-item {
 font-size: 14px;
 display: flex;
 justify-content: space-between;
 border-bottom:1px solid #ccc;
 width: 100%;
 overflow: hidden
}
.content {
	display: flex;
 width: 100%;
 /* padding: 10px; */
 line-height: 22px;
 margin-right:0;
 -webkit-transition: all 0.4s;
 transition: all 0.4s;
 -webkit-transform: translateX(90px);
 transform: translateX(90px);
 margin-left: -90px;
}
.del {
 background-color: orangered;
 width: 90px;
 display: flex;
 flex-direction: column;
 align-chatList: center;
 justify-content: center;
 color: #fff;
 -webkit-transform: translateX(90px);
 transform: translateX(90px);
 -webkit-transition: all 0.4s;
 transition: all 0.4s;
 /* display: none; */
}
.touch-move-active .content,
.touch-move-active .del {
 -webkit-transform: translateX(0);
 transform: translateX(0);
}
</style>