微信小程序---左滑显示删除 movable-area

movable-area

首先页面排版：

<view class="act_box">
      <view class="product_item" wx:for="{{adminData}}" wx:key="index">
        <movable-area class='movable-area'>
          <movable-view class='movable-view bg_white' direction="horizontal" out-of-bounds="true" inertia="true">
            <view class="touch-item  {{item.isTouchMove ? 'touch-move-active' : ''}}" data-index="{{index}}"
              bindtouchstart="touchstart" bindtouchmove="touchmove">
              <view class="content">
                <view class="product_item_name">
                  {{item.realname}}
                view>
                <view class="product_item_num">
                  {{item.employeeNumber}}
                view>
                <view class="product_item_qiy" data-index="{{index}}" data-id="{{item.id}}" data-enable="{{item.enable}}" bindtap="getStatus">
                  <view wx:if="{{item.enable}}" class="jiy_bx">
                    禁用
                  view>
                  <view wx:else class="qiy_bx">
                    启用
                  view>
                view>
              view>
              <view class="delete_btn {{item.isTouchMove ? 'delete_active' : 'delete_init'}}" catchtap="deleteAdmin"
                data-id="{{item.id}}">
                <view class="detele_icon">
                  <image style="width:100%;height:100%" src="../../images/delete.png">image>
                view>
              view>
            view>
          movable-view>
        movable-area>
      view>
    view>

样式

1. movable-area必须设置宽高，否则会被默认高度为10px
2. content部分就是默认我们看得到的部分，
3. 删除需要固定宽高度

.act_box{
  width: 100%;
  overflow: hidden;
  overflow-y: auto;
}

.product_item{
  position: relative;
  box-shadow: 0px 3px 12px rgba(0, 0, 0, 0.1);
  border-radius: 16rpx;
  margin: 7% 0;
  z-index: 999;
  box-sizing: border-box;
  display: flex;
}

.product_item:first-child{
  margin-top: 0;
}

/* 列表布局 */

.movable-area {
  width: 100%;
  height: 200rpx;
}
.movable-view{
  width: 100%;
  height: 100%;
}

.touch-item{
  display: flex;
  justify-content: space-between;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.content{
  width: 100%;
  padding: 5% 4%;
  margin-right: 0rpx;
  background-color: #fff;
  -webkit-transition: all 0.4s;
  transition: all 0.4s;
  -webkit-transform: translateX(120rpx);
  transform: translateX(120rpx);
  margin-left: -120rpx;
  overflow: hidden;
  box-sizing: border-box;
}

.touch-move-active .content, .touch-move-active .delete_btn {
  -webkit-transform: translateX(0);
  transform: translateX(0);
}

.delete_btn{
  width: 100rpx;
  background: #FFFFFF;
  border-radius: 8rpx;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  -webkit-transform: translateX(100rpx);
  transform: translateX(100rpx);
  -webkit-transition: all 0.4s;
  transition: all 0.4s;
}

.delete_active{
  box-shadow: 0px 3px 12px rgba(0, 0, 0, 0.1);
  position: relative;
}

.delete_init{
  box-shadow: none;
}

.detele_icon{
  width: 30rpx;
  height: 30rpx;
  position: absolute;
  top: 50%;
  margin-top: -15rpx;
  z-index: 1;

}
.product_item_name{
  width: auto;
  max-width: 70%;
  font-size: 32rpx;
  font-weight: bold;
  line-height: 42rpx;
  color: #2D2D2D;
}

.product_item_num{
  font-size: 28rpx;
  line-height: 36rpx;
  color: #2D2D2D;
  margin-top: 3%;
}



.product_item_qiy{
  position: absolute;
  top: 15%;
  right: 5%;
  width: 120rpx;
  height: 60rpx;
  font-size: 28rpx;
  line-height: 60rpx;
  text-align: center;
  color: #ffffff;
}

1. bindtouchstart----手指触摸动作开始，记录起始坐标的X和Y
2. bindtouchmove----滑动事件处理，一次只能画出一个删除按钮

  /**
   * 手指触摸动作开始 记录起点X坐标
   */
  touchstart(e) {
    //开始触摸时 重置所有删除
    this.data.adminData.forEach((item) => {
      if (item.isTouchMove) {
        item.isTouchMove = false
      }
    })
    this.setData({
      startX: e.changedTouches[0].clientX,
      startY: e.changedTouches[0].clientY,
      adminData: this.data.adminData
    })
  },
  /**
   * 滑动事件处理,一次只能滑出一个删除按钮
   */
  touchmove(e) {
    var that = this,
      index = e.currentTarget.dataset.index,//当前索引
      startX = that.data.startX, //开始x坐标
      startY = that.data.startY, //开始Y坐标
      touchMoveX = e.changedTouches[0].clientX, //滑动变化X坐标
      touchMoveY = e.changedTouches[0].clientY, 滑动变化Y坐标



      //获取滑动角度
      angle = that.angle({
        X: startX,
        Y: startY
      }, {
        X: touchMoveX,
        Y: touchMoveY
      });

    that.data.adminData.forEach((item, i) => {
      item.isTouchMove = false
      //滑动超过30度角 return
      if (Math.abs(angle) > 30) {
        return;
      }
      if (i == index) {
        if (touchMoveX > startX) {//右滑
          item.isTouchMove = false
        } else {//左滑
          item.isTouchMove = true
        }
      }
    })
    that.setData({
      adminData: that.data.adminData
    })
  },

  /**
   *  计算滑动角度
   * start 起点坐标
   * end 终点坐标
  * Math.PI 表示一个圆的周长与直径的比例，约为 3.14159;PI就是圆周率π，PI是弧度制的π,也就是180°
   */
  angle: function (start, end) {
    var _X = end.X - start.X,
      _Y = end.Y - start.Y
    return 360 * Math.atan(_Y / _X) / (2 * Math.PI);
  },```