微信小程序全选多选效果

效果图：

wxml代码：

<view class="memberList">
  <view class="allSelect_box" bindtap='selectAll'>
    <checkbox class="checkbox" checked="{{selectilall}}"/>
    <text class="allSelect">全选</text>
  </view>
  <view wx:for="{{list}}">
    <view class="member_box" data-index="{{index}}" data-name="{{item.id}}" bindtap='select'>
      <checkbox class="checkbox" checked="{{item.checked}}"/>
      <image src="../../assets/img/user_img.jpg" mode="widthFix" class="avatar"></image>
      <view>
        <view class="applicant_name">汪小涵 <text>管理员</text> </view>
        <view class="approval_state">总监</view>
      </view>
    </view>
  </view>
</view>

wxss代码：

.memberList{
  background:#fff;
  padding:0 35rpx 0 28rpx;
}
.allSelect_box{
  line-height:90rpx;
  border-bottom:1rpx solid #F5F5F5;
}
.checkbox{
  transform: scale(0.7,0.7);
}
.member_box .checkbox{
  margin-top: 15rpx;
}
checkbox .wx-checkbox-input.wx-checkbox-input-checked {
  color:#fff;
  background: #6669e3;
  border-color:#6669e3;
}
.allSelect{
  margin-left:15rpx;
  vertical-align:middle;
}
.member_box{
  padding-bottom:30rpx;
  display: flex;
  border-bottom:2rpx solid #EBEBEB;
  padding:20rpx 0 20rpx 0;
}
.avatar{
  100rpx;
  border-radius:50%;
  margin-left:15rpx;
}
.applicant_name{
  font-size:34rpx;
  padding:0 0 15rpx 30rpx;
}
.applicant_name text{
  color:#fff;
  background:#6669e3;
  font-size:28rpx;
  padding:5rpx 10rpx;
  border-radius:10rpx;
  margin-left:15rpx;
}
.approval_state{
  color:#8D8D8D;
  font-size:28rpx;
  padding-left: 30rpx;
}

js代码：

data: {
    list: [
      { id: 1, name: 1, checked: false },
      { id: 2, name: 2, checked: false },
      { id: 3, name: 3, checked: false },
      { id: 4, name: 4, checked: false },
    ],
    selectilall: false
  },

//单选
  select: function (e) {
    let selectValue = e.currentTarget.dataset.name
    let index = e.currentTarget.dataset.index;
    let list = this.data.list
    let newli = 'list[' + index + '].checked';
    this.setData({
      [newli]: !this.data.list[index].checked
    })
    let num = 0;
    for(var i=0;i<this.data.list.length;i++){
      if(this.data.list[i].checked){
        num++;
      }
    }
    if(num == this.data.list.length){
      this.setData({
        selectilall: true
      })
    }else{
      this.setData({
        selectilall: false
      })
    }
  },
  //全选，取消全选
  selectAll: function (e) {
    let list = this.data.list;
    let selectilall = this.data.selectilall;
    if (selectilall == false) {
      for (let i = 0; i < list.length; i++) {
        let newli = 'list[' + i + '].checked';
        this.setData({
          [newli]: true,
          selectilall: true
        })
      }
    } else {
      for (let i = 0; i < list.length; i++) {
        let newli = 'list[' + i + '].checked';
        this.setData({
          [newli]: false,
          selectilall: false
        })
      }
    }
  }