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微信小程序实现列表项左滑删除效果

时间：2023-03-13 12:12:45|栏目：JavaScript代码|点击： 次

本文实例为大家分享了微信小程序实现列表项左滑删除效果的具体代码，供大家参考，具体内容如下

效果

图片

WXML

<view class="container">
  <!-- 收货地址 -->
  <view class="address">
    <view class="left">
      <view class="icon">
        <image src="../../images/address.png"></image>
      </view>
      <view class="txt-wrap">
        <view class="txt">北京市朝阳区SOLANA蓝色港湾</view>
      </view>
    </view>
    <view class="right">
      <view class="line"></view>
      <view class="txt">编辑</view>
    </view>
  </view>
  <view class="list">
    <view class="item" wx:for="{{list}}" wx:key="index">
      <!-- 商品头部信息 -->
      <view class="head">
        <view class="head-icon" bindtap="selectItem" data-index="{{index}}">
          <image src="{{item.flag ? '../../images/select.png' : '../../images/no-select.png'}}"></image>
        </view>
        <view class="from">
          <view class="left">
            <view class="storeImg">
              <image src="../../images/store.png"></image>
            </view>
            <view class="storeName">{{item.storeName}}</view>
            <view class="arrow">
               <image src="../../images/arrow.png"></image>
            </view>
          </view>
          <view class="right">
            <view class="freight">已免运费</view>
            <view class="coupon">优惠券</view>
          </view>
        </view>
      </view>
      <!-- 商品内容信息 -->
      <view class="cont">
        <view class="wrap"
           bindtouchstart="touchStart"
           bindtouchmove="touchMove"
           data-index="{{index}}"
           style="left: -{{item.x}}rpx" />
          <view class="cont-icon">
            <view class="img-wrap" bindtap="selectItem" data-index="{{index}}">
              <image src="{{item.flag ? '../../images/select.png' : '../../images/no-select.png'}}"></image>
            </view>
            <view class="img">
              <image src="{{item.imgUrl}}"></image>
            </view>
          </view>
          <view class="info">
            <view class="name">{{item.name}}</view>
            <view class="specs-wrap">
              <view class="specs">{{item.specs}}</view>
            </view>
            <view class="discount-wrap">
              <view class="discount">{{item.discount}}</view>
            </view>
            <view class="price-wrap">
              <view class="price">
                <text>￥</text>{{item.price}}<text>.00</text>
              </view>
              <view class="num">
                <view class="reduce" bindtap="reduce" data-index="{{index}}">-</view>
                <input class="inp" 
                       type="number"
                       value="{{item.num}}"
                       maxlength="4"
                       bindinput="bindNumInput"
                       bindblur="bindNumBlur"
                       data-index="{{index}}"/>
                <view class="add" bindtap="add" data-index="{{index}}">+</view>
              </view>
            </view>
          </view>
          <!-- 商品右滑删除按钮 -->
          <view class="del" bindtap="delete" data-index="{{index}}">删除</view>
        </view>
      </view>
    </view>
  </view>
  <!-- 全选、总计、结算 -->
  <view class="total">
    <view class="total-icon" bindtap="allSelect">
      <view class="img">
        <image src="{{selectAll ? '../../images/select.png' : '../../images/no-select.png'}}"></image>
      </view>
      <text style="font-size: 26rpx;">全选</text>
    </view>
    <view class="settle">
      <view class="price">
        总计
        <text style="margin: 0 4rpx;">:</text>
        <text style="font-size: 30rpx;font-weight: 800;">¥{{totalPrice}}</text>
      </view>
      <view class="btn" wx:if="{{totalNum > 0}}">
        去结算<text style="margin-left: 4rpx;">({{totalNum}})</text>
      </view>
      <view class="btn" wx:else>
        去结算<text style="margin-left: 4rpx;">(0)</text>
      </view>
    </view>
  </view>
</view>

JS

Page({
  /**
   * 页面的初始数据
   */
  data: {
    list: [
      {
        id: 1, 
        name: 'Apple/苹果 15.4英寸2.2GHz MacBook Pro 256G四核i7处理器256G手提电脑笔记本电脑商务办公学生学习家用电脑',
        imgUrl: '../../images/0.png',
        storeName: '哇塞官方旗舰店',
        specs: '现货 5788灰 十代i7/16G/1T/6G独立显卡',
        discount: '满3000享换购',
        num: 1,
        price: '11999'
      },
      { 
        id: 2, 
        name: 'Apple/苹果 13 英寸 MacBook Pro 1.4GHz 4 核处理器 (Turbo Boost 最高可达 3.9GHz) 256GB 存储容量 触控栏和触控 ID',
        imgUrl: '../../images/1.png', 
        storeName: '哇塞官方旗舰店',
        specs: '现货 5749白 十代i7/16G/1T',
        discount: '满3000享换购',
        num: 1,
        price: '11245', 
      },
      { 
        id: 3, 
        name: 'Apple/苹果 13 英寸 MacBook Air 1.1GHz 双核 Core i3 处理器，Turbo Boost 最高可达 3.2GHz 256GB 存储容量 触控 ID', 
        imgUrl: '../../images/2.png',
        storeName: '哇塞官方旗舰店',
        specs: '现货 九代i7/16G/1T/4G独立显卡',
        discount: '满3000享换购',
        num: 1,
        price: '9245'
      },
      { 
        id: 4, 
        name: 'Apple/苹果 13 英寸 MacBook Pro 1.4GHz 4 核处理器 (Turbo Boost 最高可达 3.9GHz) 512GB 存储容量 触控栏和触控 ID', 
        imgUrl: '../../images/3.png',
        storeName: '哇塞官方旗舰店',
        specs: '现货 i7/500G/集成显卡',
        discount: '满3000享换购',
        num: 1,
        price: '11499'
      },
      { 
        id: 5, 
        name: '【原封正品】20款 Apple/苹果 13.3英寸MacBook Pro 512G笔记本电脑带触控栏ID 轻薄便携商务办公笔记本电脑', 
        imgUrl: '../../images/4.png',
        storeName: '哇塞官方旗舰店',
        specs: '现货 5746白 i5/8G/500G/集成显卡',
        discount: '满3000享换购',
        num: 1,
        price: '14499'
      }
    ],
    selectAll: false, // 是否全选
    totalNum: 0, // 已选中的商品总数量
    totalPrice: 0, // 已选中的商品总价格
    startX: 0, // 手指触摸的初始X轴坐标
    startY: 0 // 手指触摸的初始Y轴坐标
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    
  },
  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {
    this.data.list.forEach((item)=> {
      item.flag = false // 是否已选中商品的依据字段
      item.x = 0 // 每个列表项的相对定位的初始位置
    })
  },
  // 单个商品选中，计算已选中的商品总价格
  selectItem(e) {
    let index = e.currentTarget.dataset.index
    let flag = this.data.list[index].flag
    if(flag == false) {
      this.data.list[index].flag = true
    } else {
      this.data.list[index].flag = false
    }
    // 判断是否全部选中了
    let bool = this.data.list.every((item) => {
      return item.flag
    })
    this.setData({
      selectAll: bool,
      list: this.data.list
    })
    this.countPrice()
  },
  // 减少数量，计算已选中的商品总价格
  reduce(e) {
    let index = e.currentTarget.dataset.index
    let num = this.data.list[index].num
    // 判断当前商品的数量是否大于1，大于1则可以进行减少操作
    if(num > 1) {
      this.data.list[index].num = num - 1
    }
    this.setData({
      list: this.data.list
    })
    this.countPrice()
  },
  // 输入数量
  bindNumInput(e) {
    let val = e.detail.value
    let index = e.currentTarget.dataset.index
    if(Number(val) == 0) {
      this.data.list[index].num = 1
    } else {
      this.data.list[index].num = Number(val)
    }
  },
  // 失去焦点，计算已选中的商品总价格
  bindNumBlur() {
    this.setData({
      list: this.data.list
    })
    this.countPrice()
  },
  // 增加商品数量，计算已选中的商品总价格
  add(e) {
    let index = e.currentTarget.dataset.index
    let num = this.data.list[index].num
    this.data.list[index].num = num + 1
    this.setData({
      list: this.data.list
    })
    this.countPrice()
  },
  // 手指触摸的起始坐标
  touchStart(e) {
    this.data.startX = e.touches[0].clientX;
    this.data.startY = e.touches[0].clientY;
  },
  // 滑动列表项
  touchMove(e) {
    let index = e.currentTarget.dataset.index
    // 获得当前坐标
    let currentX = e.touches[0].clientX;
    let currentY = e.touches[0].clientY;
    let x = this.data.startX - currentX; //横向移动距离
    let y = Math.abs(this.data.startY - currentY); //纵向移动距离，若向左移动有点倾斜也可以接受
    if (x > 35 && y < 110) {
    // 向左滑是显示删除
      this.data.list[index].x = 110; 
      this.setData({
        list:  this.data.list
      })
    } else if (x < -35 && y < 110) {
      // 向右滑
      this.data.list[index].x = 0; 
      this.setData({
        list:  this.data.list
      })
    }
  },
  // 删除列表项，重新计算总价格和全选状态
  delete(e) {
    let index = e.currentTarget.dataset.index
    this.data.list.splice(index, 1)
    this.setData({
      list: this.data.list
    })
    this.countPrice()
  },
  // 全选
  allSelect() {
    // 判断是否已经全选，是就全部取消选中，否则全部选中，之后计算总价格
    if(this.data.selectAll) {
      this.data.list.forEach((item)=>{
        item.flag = false
      })
      this.data.selectAll = false
    } else {
      this.data.list.forEach((item)=>{
        item.flag = true
      })
      this.data.selectAll = true
    }
    this.setData({
      selectAll: this.data.selectAll,
      list: this.data.list
    })
    this.countPrice()
  },
  // 计算已选中的总价格
  countPrice() {
    // 判断是否有已选中的商品，有则进行计算，没有则清除全选状态，总价格，结算的商品数量
    let bool = this.data.list.some((item) => {
      return item.flag
    })
    if(bool) {
      // 每次重新计算时，先把上一次记录的数据清空
      this.data.totalNum = 0 
      this.data.totalPrice = 0
      this.data.list.forEach((item)=>{
        if(item.flag == true) {
          this.data.totalPrice += (item.price * item.num)
          this.data.totalNum += item.num
        }
      })
    } else {
      this.data.totalNum = 0
      this.data.totalPrice = 0
      this.data.selectAll = false
    }
    this.setData({
      totalNum: this.data.totalNum,
      totalPrice: this.data.totalPrice,
      selectAll: this.data.selectAll
    })
  }
})

WXSS

page {
  background: #f2f2f2;
}
.container {
  width: 100%;
  padding-bottom: 90rpx;
  box-sizing: border-box;
  overflow-y: scroll;
}
.address {
  width: 100%;
  height: 80rpx;
  background: #fff;
  border-bottom-left-radius: 20rpx;
  border-bottom-right-radius: 20rpx;
  padding: 0 30rpx;
  box-sizing: border-box;
  font-size: 28rpx;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20rpx;
}
.address .left {
  flex: 1;
  display: flex;
  align-items: center;
}
.address .left .icon {
  width: 32rpx;
  height: 35rpx;
  margin-right: 8rpx;
}
.address .left .icon image {
  width: 100%;
  height: 100%;
}
.address .left .txt-wrap {
  width: 0;
  flex: 1;
}
.address .left .txt-wrap .txt {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding-right: 10rpx;
  box-sizing: border-box;
}
.address .right {
  width: 80rpx;
  display: flex;
  align-items: center;
}
.address .right .line {
  width: 0rpx;
  height: 26rpx;
  border-left: 4rpx solid #bfbfbf;
}
.address .right .txt {
  flex: 1;
  text-align: right;
}

.list {
  width: 100%;
}
.list .item {
  width: 100%;
  border-radius: 20rpx;
  padding: 30rpx 0;
  box-sizing: border-box;
  background: #ffffff;
  margin-bottom: 20rpx;
}

/* 商品头部信息 */
.list .item .head {
  width: 100%;
  font-size: 26rpx;
  padding: 0 30rpx;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  margin-bottom: 20rpx;
}
/* 商品选中图标 */
.list .item .head .head-icon {
  width: 40rpx;
  height: 40rpx;
  margin-right: 26rpx;
  border-radius: 100%;
  box-shadow: 0 0 10rpx lightgray;
}
.list .item .head .head-icon image {
  width: 100%;
  height: 100%;
}
.list .item .head .from {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.list .item .head .from .left {
  display: flex;
  align-items: center;
}
.list .item .head .from .left .storeImg {
  width: 26rpx;
  height: 26rpx;
  margin-top: -4rpx;
  margin-right: 8rpx;
}
.list .item .head .from .left .storeImg image {
  width: 100%;
  height: 100%;
}
/* 店铺名称 */
.list .item .head .from .left .storeName {
  flex: 1;
  margin-right: 14rpx;
}
/* 右箭头 */
.list .item .head .from .left .arrow {
  width: 8rpx;
  height: 34rpx;
  display: flex;
  align-items: center;
}
.list .item .head .from .left .arrow image {
  width: 100%;
  height: 16rpx;
.list .item .head .from .right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
/* 免运费 */
.list .item .head .from .right .freight {
  font-size: 22rpx;
  color: #1e1e1e;
}
/* 优惠券 */
.list .item .head .from .right .coupon {
  font-size: 24rpx;
  padding: 4rpx 14rpx;
  background: #ffeded;
  border-radius: 20rpx;
  margin-left: 16rpx;
  color: #ffaa7f;
}

/* 商品信息 */
.list .item .cont {
  width: 100%;
  overflow: hidden;
  font-size: 26rpx;
}
.list .item .cont .wrap {
  width: 100%;
  padding: 0 30rpx;
  box-sizing: border-box;
  display: flex;
  justify-content: flex-start;
  transition: all 0.2s;
  position: relative;
  top: 0;
  left: 0;
}
/* 商品油滑的删除按钮 */
.list .item .cont .wrap .del {
  width: 110rpx;
  height: 100%;
  background: #ffaa7f;
  font-size: 24rpx;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  top: 0;
  right: -110rpx;
}
.list .item .cont .wrap .cont-icon {
  display: flex;
  margin-right: 26rpx;
}
/* 商品选中或未选中图标 */
.list .item .cont .wrap .cont-icon .img-wrap {
  width: 40rpx;
  height: 40rpx;
  margin-right: 26rpx;
  border-radius: 100%;
  box-shadow: 0 0 10rpx lightgray;
  position: relative;
  top: 72rpx;
  left: 0;
}
.list .item .cont .wrap .cont-icon .img-wrap image {
  width: 100%;
  height: 100%;
}
/* 商品图片 */
.list .item .cont .wrap .cont-icon .img {
  width: 190rpx;
  height: 190rpx;
  border-radius: 10rpx;
  box-shadow: 0 0 10rpx lightgray;
  overflow: hidden;
}
.list .item .cont .wrap .cont-icon .img image {
  width: 100%;
  height: 100%;
}
.list .item .cont .wrap .info {
  flex: 1;
  width: 0;
}
/* 商品名称 */
.list .item .cont .wrap .info .name {
  overflow : hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  margin-bottom: 10rpx;
}
/* 商品规格 */
.list .item .cont .wrap .info .specs-wrap {
  width: 100%;
  font-size: 24rpx;
  padding-right: 12rpx;
  border-radius: 18rpx;
  box-sizing: border-box;
  margin-bottom: 8rpx;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list .item .cont .wrap .info .specs-wrap .specs {
  display: inline-block;
  background: #f2f2f2;
  border-radius: 18rpx;
  padding: 4rpx 16rpx 4rpx 16rpx;
  box-sizing: border-box;
}
/* 商品优惠 */
.list .item .wrap .wrap .cont .info .discount-wrap {
  width: 100%;
  font-size: 24rpx;
}
.list .item .cont .wrap .info .discount-wrap .discount {
  display: inline-block;
  background: #f2f2f2;
  border-radius: 18rpx;
  padding: 4rpx 20rpx 4rpx 16rpx;
  box-sizing: border-box;
}
/* 商品价格 */
.list .item .cont .wrap .info .price-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8rpx;
}
.list .item .cont .wrap .info .price-wrap .price {
  font-size: 36rpx;
  font-weight: 700;
  color: #ffaa7f;
}
.list .item .cont .wrap .info .price-wrap .price text {
  font-size: 24rpx;
}
/* 商品数量 */
.list .item .cont .wrap .info .price-wrap .num {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.list .item .cont .wrap .info .price-wrap .num .reduce {
  width: 40rpx;
  font-weight: 800;
  color: #262626;
  text-align: center;
  line-height: 40rpx;
}
.list .item .cont .wrap .info .price-wrap .num .inp {
  width: 80rpx;
  height: 40rpx;
  min-height: 40rpx;
  text-align: center;
  background: #f2f2f2;
  margin: 0 2rpx;
}
.list .item .cont .wrap .info .price-wrap .num .add {
  width: 40rpx;
  font-weight: 800;
  color: #262626;
  text-align: center;
  line-height: 40rpx;
}

/* 全选、总计、结算 */
.total {
  width: 100%;
  height: 90rpx;
  background: #fff;
  padding: 0 20rpx 0 30rpx;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 99;
}
.total .total-icon {
  display: flex;
  align-items: center;
  justify-content: flex-start;
}
.total .total-icon .img {
  width: 40rpx;
  height: 40rpx;
  margin-right: 14rpx;
  border-radius: 100%;
  box-shadow: 0 0 10rpx lightgray;
}
.total .total-icon image {
  width: 100%;
  height: 100%;
}
.total .settle {
  font-size: 24rpx;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.total .settle .price {
  display: flex;
  align-items: center;
  margin-right: 16rpx;
}
.total .settle .btn {
  height: 60rpx;
  background: #ffaa7f;
  border-radius: 30rpx;
  padding: 0 30rpx;
  box-sizing: border-box;
  font-size: 24rpx;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}

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