微信小程序movable-area实现左滑删除

1.实现效果

2.实现原理

微信小程序自带组件movable-view，此节点为movable-area子节点，必须包裹在movable-area中，不设置宽高时候 默认为10rpx。

3.部分代码

  
      
        {{item.name}}
    
  
  删除

/* pages/touchMove2/index.wxss */
page{
  background: #F5F5F8;
}
.top{
  margin: 20rpx;
  width: 710rpx;
  height: 200rpx;
  background: #FFFFFF;
  border-radius: 20rpx;
  line-height:200rpx;
  text-align:center;
  display: flex;
}

movable-view{
  width: 710rpx;
  height: 200rpx;
  background: #FFFFFF;
  border-radius: 20rpx;
  line-height:200rpx;
  text-align:center;
}
movable-area{
  height: 200rpx;
  background: #FFFFFF;
  border-radius: 20rpx;
  line-height:200rpx;
  text-align:center;
  width: calc(710rpx - 120rpx);
}
.movable_delete_btn {
  justify-content: center;
  width: 115rpx;
  font-size: 24rpx;
  font-weight: 600;
  color: #FFFFFF;
  background: red;
  border-top-right-radius: 20rpx;
  border-bottom-right-radius: 20rpx;
}

// pages/touchMove2/index.js
Page({

  /**
   * 页面的初始数据
   */
  data: {
    cardList:[
      {
        id:'1',
        name:'左滑试试吧',
        xmove:0,
      }, 
      {
        id:'2',
        name:'左滑试试吧',
        xmove:0,
      },
      {
        id:'3',
        name:'左滑试试吧',
        xmove:0,
      },
      {
        id:'4',
        name:'左滑试试吧',
        xmove:0,
      }, 
    ]
  },

  /**
     * 处理touchstart事件
     */
    handleTouchStart(e) {
      this.startX = e.touches[0].pageX
  },

  /**
   * 处理touchend事件
   */
  handleTouchEnd(e) {
      if (e.changedTouches[0].pageX < this.startX && e.changedTouches[0].pageX - this.startX <= -30) {
          this.showDeleteButton(e)
      } else if (e.changedTouches[0].pageX > this.startX && e.changedTouches[0].pageX - this.startX < 30) {
          this.showDeleteButton(e)
      } else {
          this.hideDeleteButton(e)
      }
  },
  /**
     * 显示删除按钮
     */
    showDeleteButton: function (e) {
      let index = e.currentTarget.dataset.index;
      this.setXmove(index, -65);
  },

  /**
   * 隐藏删除按钮
   */
  hideDeleteButton: function (e) {
      let index = e.currentTarget.dataset.index;
      this.setXmove(index, 0);
  },

  /**
   * 设置movable-view位移
   */
  setXmove: function (index, xmove) {
      let {cardList} = this.data;
      cardList[index].xmove = xmove;
      this.setData({
        cardList: cardList
      })
      console.log(this.data.cardList)
  },

  /**
   * 处理movable-view移动事件
   */
  handleMovableChange: function (e) {
      if (e.detail.source === 'friction') {
          if (e.detail.x < -30) {
              this.showDeleteButton(e)
          } else {
              this.hideDeleteButton(e)
          }
      } else if (e.detail.source === 'out-of-bounds' && e.detail.x === 0) {
          this.hideDeleteButton(e)
      }
  },
  onLoad: function (options) {

  },


 
  onShow: function () {

  },
  handleDelete(e) {
    let {id} = e.currentTarget.dataset;
    this.itemDel(id)
  },
  itemDel(id){
    this.data.cardList.forEach((item,index)=>{
      if(item.id==id){
        this.data.cardList.splice(index,1)
      }
      this.setData({
        cardList:this.data.cardList
      })
      wx.showToast({
        title: '删除成功',
        icon:'success'
      })
    })
  }
 
})

4.写在最后

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