微信小程序复选框组件使用详解

<fORM bindsubmit="formSubmit">
  <view class='content'>
  <!-- 一级菜单 -->
    <scroll-view class='scrollLeft' scroll-y>
      <block wx:for="{{list}}" wx:key="item">
        <view class="leftBox" catchtap='ontap' data-index='{{index}}' style='{{n==index?"border-left:8rpx solid #1aad16;color:#1aad16":""}}'>
          {{item.istitle}}
          <view class='num' hidden="{{checked[index].length>0?false:true}}">
            <text>{{allNum[index]?allNum[index]:(checked[index].length>0?checked[index].length:0)}}</text>
          </view>
        </view>
      </block>
    </scroll-view>
    <!-- 二级菜单 -->
    <scroll-view class='scrollRight' scroll-y>
      <view class="weui-cells weui-cells_after-title">
      <!-- 二级菜单中的全部选项 -->
        <label class="weui-cell weui-check__label" catchtap='all'>
          <checkbox class="weui-check" value="{{childlist[n][0].value}}" checked="{{childlist[n][0].checked}}" />
          <view class="weui-cell__hd weui-check__hd_in-checkbox">
            <icon class="weui-icon-checkbox_circle" type="circle" size="23" wx:if="{{!childlist[n][0].checked}}"></icon>
            <icon class="weui-icon-checkbox_success" type="success" size="23" wx:if="{{childlist[n][0].checked}}"></icon>
          </view>
          <view class="weui-cell__bd">{{childlist[n][0].istitle}}</view>
        </label>
        <checkbox-group bindchange="checkboxChange">
        <!-- 二级菜单中的剩余选项 -->
          <block wx:for="{{childlist[n]}}" wx:key="value">
            <label class="weui-cell weui-check__label" wx:if='{{item.istitle!="全部"}}'>
              <checkbox class="weui-check" value="{{item.id}}" checked="{{item.checked}}" />
 
              <view class="weui-cell__hd weui-check__hd_in-checkbox">
                <icon class="weui-icon-checkbox_circle" type="circle" size="23" wx:if="{{!item.checked}}"></icon>
                <icon class="weui-icon-checkbox_success" type="success" size="23" wx:if="{{item.checked}}"></icon>
              </view>
              <view class="weui-cell__bd">{{item.istitle}}</view>
            </label>
          </block>
        </checkbox-group>
      </view>
    </scroll-view>
  </view>
  <view class="btn-area">
    <button catchtap='back'>返回</button>
    <button formType="submit">提交</button>
  </view>
</form>

page{
  background: #f8f8f8;
}
.content{
  position: absolute;
  top:0;
  bottom:100rpx; 
  width: 100%;
}
.scrollLeft{
  box-sizing: border-box;
  float: left;
  width: 25%;
  height: 100%;
  border-right: 1rpx solid #DDD;
  font-size: 35rpx;
}
.scrollRight{
  float: left;
  width: 75%;
  height: 100%;
}
.leftBox{
  position: relative;
  box-sizing: border-box;
  width: 100%;
  height: 100rpx;
  display: flex;
  justify-content: center;
  align-items:center;
  border-bottom: 1rpx solid #ddd;
}
.num{
  position: absolute;
  top:10rpx;
  right: 10rpx;
  width: 30rpx;
  height: 30rpx;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #f10215;
  border-radius: 50%;
  color: white;
  font-size: 22rpx;
}
.rightBox{
  box-sizing: border-box;
  width: 100%;
}
.weui-cells {
  position: relative;
  margin-top: 1.17647059em;
  background-color: #FFFFFF;
  line-height: 1.41176471;
  font-size: 17px;
}
.weui-cells_after-title {
  margin-top: 0;
}
.weui-cell {
  padding: 10px 15px;
  position: relative;
  display: -WEBkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
          align-items: center;
}
.weui-check__label:active {
  background-color: #ECECEC;
}
.weui-check {
  position: absolute;
  left: -9999px;
}
.weui-check__hd_in-checkbox {
  padding-right: 0.35em;
}
.weui-icon-checkbox_circle,
.weui-icon-checkbox_success {
  margin-left: 4.6px;
  margin-right: 4.6px;
}
.weui-cell__bd {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
          flex: 1;
}
.btn-area{
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 100rpx;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 20rpx;
}
.btn-area>button:first-child{
  width: 30%;
  height: 80%;
  color: white;
  background-color: orange;
  display: flex;
  justify-content: center;
  align-items: center;
}
.btn-area>button:last-child{
  width: 65%;
  height: 80%;
  color: white;
  background-color: #1aad16;
  display: flex;
  justify-content: center;
  align-items: center;
}

{
  "component":true
}

Component({
  properties: {
    list: {
      type: Array,
      value: [],
    },
    select:{
      type: Array,
      value: [],
    }
  },
  data: {
    childlist: [], 
    n: 0,
    checked: [],
    allNum: [],
  },
  ready(){
    var that=this;
    var list = that.data.list;//传递过来的数据
    // console.log(list)
    var select = that.data.select;
    var checked = new Array;
    var allNum = []; 
      var aaa = [];
      // 检查默认选中状态
      for (let i = 0; i < list.length; i++) {
        for (let k = 0; k < list[i].childlist.length; k++) {
          for (let j = 0; j < select.length; j++) {
            if (list[i].childlist[k].id == select[j]) {
              aaa = [];
              // 若某条二级数组中存在多个选中的项要做判断筛选
              if (checked[i]) {
                // check中第i项如果存过值，那么将在此项中继续加入值
                checked[i].forEach(function (item) {
                  aaa.push(item);
                })
                aaa.push(list[i].childlist[k]);
                checked[i] = aaa;
              } else {
                // check中第i项没有存过值，那么将值存入第i项
                if (list[i].childlist[k].istitle == "全部") {
                  for (let s = 0; s < list[i].childlist.length; s++) {
                    list[i].childlist[s].checked = true
                    allNum[i] = list[i].childlist.length - 1;
                    checked[i] = [list[i]];
                  }
                } else {
                  checked[i] = [list[i].childlist[k]];
                }
 
              }
              list[i].childlist[k].checked = true;
            }
          }
        }
      }
    
    that.setData({
      'childlist[0]': list[0].childlist,
      list: list,
      checked: checked,
      allNum: allNum,
    })
    console.log(checked);
    console.log(allNum);
  },
  methods: {
    ontap(e) {
      var that = this;
      var n = e.currentTarget.dataset.index;
      var childlist = "childlist[" + n + "]";
      that.setData({
        [childlist]: that.data.list[n].childlist,
        n: n
      })
    },
    all() {
      var that = this;
      var n = that.data.n;
      var childlist = "childlist[" + n + "]";
      var checked = "checked[" + n + "]";
      var allNum = "allNum[" + n + "]";
      var all = "";
      var checkArr = [];
      var checkboxItems = that.data.childlist[n];
      if (checkboxItems[0].checked) {
        checkboxItems[0].checked = true;
        checkArr = [];
      } else {
        checkboxItems[0].checked = false;
        // checkArr.push(checkboxItems[0])
        checkArr.push(that.data.list[n])
        all = checkboxItems.length - 1;
      }
      checkboxItems[0].checked = !checkboxItems[0].checked
      for (let k = 1; k < checkboxItems.length; k++) {
        checkboxItems[k].checked = checkboxItems[0].checked;
      }
      console.log(checkboxItems);
 
      that.setData({
        [childlist]: checkboxItems,
        [checked]: checkArr,
        [allNum]: all ? all : 0,
      }, function () {
        console.log(that.data.checked);
      })
    },
    checkboxChange(e) {
      var that = this;
      var n = that.data.n;
      console.log('checkbox发生change事件，携带value值为：', e.detail.value)
      var checkboxItems = that.data.childlist[n];
      var values = e.detail.value;
      var flag = "";
      var childlist = "childlist[" + n + "]";
      var checked = "checked[" + n + "]";
      var allNum = "allNum[" + n + "]";
      var checkedArr = [];
      var all = "";
 
      for (var i = 0, lenI = checkboxItems.length; i < lenI; ++i) {
        checkboxItems[i].checked = false;
        for (var j = 0, lenJ = values.length; j < lenJ; ++j) {
          if (checkboxItems[i].id == values[j]) {
            checkboxItems[i].checked = true;
            checkedArr.push(checkboxItems[i]);
            break;
          }
        }
      }
      if (values.length == checkboxItems.length - 1) {
        checkboxItems[0].checked = true;
        // checkedArr = [checkboxItems[0]];
        checkedArr = [that.data.list[n]];
        all = checkboxItems.length - 1;
      }
      this.setData({
        [childlist]: checkboxItems,
        [checked]: checkedArr,
        [allNum]: all
      });
      // console.log(checkedArr)
    },
    formSubmit: function (e) {
      var that = this;
      console.log('form发生了submit事件');
      var values = that.data.checked;
      var arr = [];
      var arr1 = [];
      for (let i = 0; i < values.length; i++) {
        if (values[i] != undefined) {
          arr.push(values[i]);
        }
      }
 
      for (let i = 0; i < arr.length; i++) {
        for (let j = 0; j < arr[i].length; j++) {
          arr1.push(arr[i][j])
        }
      }
      console.log(arr1);//选中的值
      var detail = arr1;
 
      this.triggerEvent("formSubmit", detail);
    },
    back() {
      this.triggerEvent("back");
    }
  }
})

{
  "usinGComponents": {
    "check": "/components/checkGrop/checkGrop"
  }
}

<check list="{{hangye}}" select="{{checkedid}}" bind:formSubmit="formSubmit" bindback="back"></check>