微信小程序-自定义复选框

功能：　1、需要多选复选框，并且可以上拉滚动；

　　　　2、需要通过名称手写字母排序的，并且可以上拉滚动；

常规的小程序自带的原生picker无法满足我们的要求，因此一些特殊效果需要我们自定义来实现，废话不多说，我们直接看效果：

index.wxml布局

<view class="container">
  <view class=‘class bgFFF‘ bindtap=‘isDep‘>
    <view class=‘class-text‘>
        <text class=‘red‘> </text>
        <text>开放部门</text>
      </view>
    <view class=‘class-choose‘>
      <text class=‘color333 perItem‘ wx:if="{{checkValue.length>0}}">
        <block wx:for="{{checkValue}}" wx:key="index"> {{item}} </block>
      </text>
      <text wx:else>默认全部</text>
      <image src=‘/images/right-icon.png‘ mode="widthFix"></image>
    </view>
  </view>
  <view class=‘class bgFFF‘ bindtap=‘isPer‘>
    <view class=‘class-text‘>
        <text class=‘red‘> </text>
        <text>开放成员</text>
      </view>
    <view class=‘class-choose‘>
      <text class=‘color333 perItem‘ wx:if="{{depValue.length>0}}">
        <block wx:for="{{depValue}}" wx:key="index"> {{item}} </block>
      </text>
      <text wx:else>默认全部</text>
      <image src=‘/images/right-icon.png‘ mode="widthFix"></image>
    </view>
  </view>
</view>

<!-- 部门列表 -->
<view class=‘typeListBox‘ wx:if="{{isDep}}">
  <view class=‘wrap‘>
    <view class=‘nav‘>
      <text class=‘active‘>部门</text>
      <!-- <text class=‘{{navId==2?"active":""}}‘ data-id=‘2‘ bindtap=‘getNav‘>人员</text> -->
    </view>
    <view class=‘checkbox-con‘>
      <scroll-view scroll-y style="height: 700rpx;" scroll-top="{{scrollTop}}">
        <checkbox-group bindchange="checkboxChange" class="checkbox-group">
          <view wx:for="{{checkboxArr}}" wx:key="item.name">
            <label class="{{item.checked?‘checkbox checked‘:‘checkbox‘}}" bindtap=‘checkbox‘ data-index="{{index}}">
              <checkbox value="{{item.name}}" checked="{{item.checked}}"/>{{item.name}}
            </label>
          </view>
        </checkbox-group>
      </scroll-view>
    </view>
    <view class=‘btn1‘>
      <button class=‘bgFFF‘ bindtap=‘cancel‘>取消</button>
      <button class=‘‘ bindtap=‘confirm‘>确定</button>
    </view>
  </view>
</view>

<!-- 成员列表 -->
<view class=‘typeListBox‘ wx:if="{{isPer}}">
  <view class=‘wrap‘>
      <!-- 字母锚点 -->
      <view class=‘anchor‘>
        <view bindtap="jumpTo" wx:for="{{words}}" wx:key="i" data-opt="{{item}}">{{item}}</view>
      </view>

    <view class=‘nav‘>
      <text class=‘active‘>人员</text>
    </view>
    <view class=‘checkbox-con‘>
      <scroll-view scroll-y style="height: 700rpx;" scroll-with-animation=‘true‘ scroll-top="{{scrollTop}}" scroll-into-view="{{toView}}">
        <view class=‘typeList‘>
          <checkbox-group class="radio-group" bindchange="checkBoxPer">
            <view wx:for="{{personnelArr}}" wx:key="index" wx:for-item="itemName" wx:for-index="itemNameInd">
              <view class=‘typeList-item-title‘ id="{{itemName.name}}">{{itemName.name}}</view>
              <label class=‘typeList-item‘ data-itemnameind=‘{{itemNameInd}}‘ bindtap="checkPer" wx:for="{{itemName.a}}" wx:key="a" wx:for-item="item" data-index="{{index}}">
                <checkbox value="{{item.name}}" checked="{{item.checked}}" color=‘#3eace2‘/>
                <text>{{item.name}}</text>
              </label>
            </view>
          </checkbox-group>
        </view>
      </scroll-view>
    </view>
    <view class=‘btn1‘>
      <button class=‘bgFFF‘ bindtap=‘cancel‘>取消</button>
      <button class=‘‘ bindtap=‘confirmPer‘>确定</button>
    </view>
  </view>
</view>

index.wxss样式

.container {
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  background-color: #f5f5f5;
  padding-top: 20rpx;
} 

.class{
  display: flex;
  flex-direction: row;
  padding: 20rpx 0;
  background-color: #fff;
  margin-bottom: 20rpx;
}
.class view.class-text{
  flex: 1;
  padding-left: 30rpx;
  font-size: 14px;
}
.red{
  margin-right: 10rpx;
  color: #ff0000;
}
.class-choose{
  max-width: 60%;
  display: flex;
  flex-direction: row;
  text-align: right;
}
.class-choose-item{
  display: flex;
  flex-direction: column;
  padding-right: 40rpx;
}
.class-choose text{
  flex: 1;
  font-size: 14px;
  color: #999;
}
.class-choose text.color333{
  color: #333;
}
.class-choose image{
  width: 16px;
  margin: 6rpx 20rpx 0;
}

/* 部门列表样式 */
.typeListBox{
  z-index: 101;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 50rpx;
  background: rgba(0,0,0,0.3);
}
.typeList{
  /* margin-top: 200rpx; */
  padding: 0 30rpx;
  border-radius: 5px;
  font-size: 13px;
  background-color: #fff;
}
.typeList .radio-group{
  display: flex;
  flex-direction: column;
}
.typeList-item{
  display: flex;
  flex-direction: row;
  padding: 20rpx 0;
  border-bottom: 1rpx solid #f5f5f5;
}
.typeList-item text{
  margin-left: 10rpx;
  line-height: 48rpx;
}
.radio{
  padding: 0 20rpx 0 0;
}
.engineer{
  padding: 0 20rpx 0 0;
}
.engineer-text{
  line-height: 46rpx;
}
.engineer-item{
  padding: 10rpx 0;
}

.nav{
  display: flex;
  flex-direction: row;
  border-bottom: 1rpx solid #f5f5f5;
}
.nav text{
  padding: 20rpx;
  flex: 1;
  text-align: center;
  font-size: 16px;
}
.nav text.active{
  color: #3eace2;
  border-bottom: 1rpx solid #3eace2;
}.wrap{
  padding: 20rpx 30rpx;
  border-radius: 5px;
  font-size: 13px;
  background-color: #fff;
  position: relative;
}

.checkbox-con{
  margin: 50rpx auto;
  text-align: center;
  position: relative;
}
.checkbox-group view{
  float: left;
  width: 50%;
  display: flex;
  flex-direction: column;
  padding: 0 20rpx 40rpx;
  box-sizing: border-box;
}
.checkbox{
  flex: 1;
  height: 72rpx;
  line-height: 72rpx;
  font-size: 28rpx;
  color: #888888;
  border: 1rpx solid #CECECE;
  border-radius: 5rpx;
  /* display: inline-block; */
  /* margin: 0 10rpx 30rpx 0; */
  position: relative;
}
/* .checkbox-group{
  display: flex;
  flex-direction: row;
} */
.checked{
  color: #3eace2;
  background: rgba(49,165,253,0.08);
  border: 1rpx solid #3eace2;
}
.checkbox checkbox{
  display: none
}
.checked-img{
  width: 28rpx;
  height: 28rpx;
  position: absolute;
  top: 0;
  right: 0
}
.btn1{
  display: flex;
  flex-direction: row;
}
.btn1 button{
  flex: 1;
  background-color: #3eace2;
  color: #fff;
}
.btn1 button.bgFFF{
  margin-right: 20rpx;
  color: #666;
  background-color: #fff;
}
.perItem{
  box-sizing: border-box;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}
.anchor{
  z-index: 101;
  position: absolute;
  top: 150rpx;
  right: 20rpx;
  font-size: 12px;
}
.anchor view{
  padding: 0 5rpx;
  text-align: center;
}
.typeList-item-title{
  padding: 10rpx 10rpx 5rpx;
  color: #666;
  background-color: #f5f5f5;
  text-align: left;
}

index.js

const app = getApp()

Page({
  data: {
    checkboxArr: [
      {
        checked: false,//是否选中
        id: "1",//部门能id
        name: "部门1",
      },
      {
        checked: false,//是否选中
        id: "2",//部门能id
        name: "部门2",
      },
      {
        checked: false,//是否选中
        id: "3",//部门能id
        name: "部门3",
      },
      {
        checked: false,//是否选中
        id: "4",//部门能id
        name: "部门4",
      },
      {
        checked: false,//是否选中
        id: "5",//部门能id
        name: "部门5",
      },
      {
        checked: false,//是否选中
        id: "6",//部门能id
        name: "部门6",
      },
      {
        checked: false,//是否选中
        id: "7",//部门能id
        name: "部门7",
      },
      {
        checked: false,//是否选中
        id: "8",//部门能id
        name: "部门8",
      },
      {
        checked: false,//是否选中
        id: "9",//部门能id
        name: "部门9",
      },
      {
        checked: false,//是否选中
        id: "10",//部门能id
        name: "部门10",
      },
      {
        checked: false,//是否选中
        id: "11",//部门能id
        name: "部门11",
      },
      {
        checked: false,//是否选中
        id: "12",//部门能id
        name: "部门12",
      },
      {
        checked: false,//是否选中
        id: "13",//部门能id
        name: "部门13",
      },
      {
        checked: false,//是否选中
        id: "14",//部门能id
        name: "部门14",
      },
      {
        checked: false,//是否选中
        id: "15",//部门能id
        name: "部门15",
      },
    ],//部门列表
    personnelArr: null,//人员列表
    checkValue: [],//部门
    depValue: [],//部门
    isDep: false,//部门显隐
    isPer: false,//成员显隐
    d_id: [],//部门id集合
    u_id: [],//人员集合
    words: null,//成员名称的手写字母
  },

  //控制部门的显隐
  isDep: function () {
    this.setData({
      isDep: true,
    })
  },

  //控制人员显隐
  isPer: function () {
    this.setData({
      isPer: true,
    })
  },

  //取消按钮
  cancel: function () {
    this.setData({
      isDep: false,
      isPer: false
    })
  },

  //人员
  checkPer: function (e) {
    var index = e.currentTarget.dataset.index;//获取当前点击的下标
    var ind = e.currentTarget.dataset.itemnameind;//获取当前点击的下标
    var personnelArr = this.data.personnelArr;//选项集合
    personnelArr[ind].a[index].checked = !personnelArr[ind].a[index].checked;//改变当前选中的checked值

    // var u_id = this.data.u_id;//获取data中的成员id集合
    // var id = personnelArr[ind].a[index].id;//获取选中的成员id
    //  //判断，当前选中的这个值的checked是不是已经选中，如果是则将id放入选中成员id集合，反之则移除
    // if (personnelArr[ind].a[index].checked) {
    //   u_id.push(id);
    // } else {
    //   this.removeByValue(u_id, id);
    // }

    this.setData({
      personnelArr: personnelArr
    });
  },
  checkBoxPer: function (e) {
    var depValue = e.detail.value;
    this.setData({
      depValue: depValue
    });
  },
  confirmPer: function () {// 提交
    this.setData({
      isPer: false,
    })
  },

  //部门
  checkbox: function (e) {
    var index = e.currentTarget.dataset.index;//获取当前点击的下标
    var checkboxArr = this.data.checkboxArr;//选项集合
    checkboxArr[index].checked = !checkboxArr[index].checked;//改变当前选中的checked值

    //如果需要部门联动成员
    // var d_id = this.data.d_id;//获取data中的部门id集合
    // var id = checkboxArr[index].id;//获取选中的部门id
    // //判断，当前选中的这个值的checked是不是已经选中，如果是则将id放入选中部门id集合，反之则移除
    // if (checkboxArr[index].checked) {
    //   d_id.push(id);
    // } else {
    //   this.removeByValue(d_id, id);
    // }

    this.setData({
      checkboxArr: checkboxArr
    });
  },
  checkboxChange: function (e) {
    var checkValue = e.detail.value;
    this.setData({
      checkValue: checkValue
    });
  },
  confirm: function () {// 确定
    this.setData({
      isDep: false,
      // depValue: []如果是联动，选中部门后需要清除选中的成员
    })
    // this.getUser();//通过选中部门来获取不通的部门成员，将获取到的数据存入checkboxArr中
  },

  onLoad: function () {
    //模拟测试人员数据
    var arr = {
      data: [
        {
          checked: false,
          id: "83",
          name: "张三",
          word: "Z",
        }, {
          checked: false,
          id: "22",
          name: "张三丰",
          word: "Z",
        }, {
          checked: false,
          id: "23",
          name: "张无忌",
          word: "Z",
        }, {
          checked: false,
          id: "83",
          name: "李四",
          word: "L",
        }, {
          checked: false,
          id: "83",
          name: "王五",
          word: "W",
        }, {
          checked: false,
          id: "83",
          name: "测试",
          word: "C",
        },
      ],//成员数组
      words: ["C", "L", "W", "Z"],//成员字母集合
    };
    this.setData({
      words: arr.words,
    })
    this.integration(arr)
  },

  // 整合人员字母
  integration: function (list) {
    // console.log(list)
    var arr = [];
    for (var j = 0; j < list.words.length; j++) {
      var aa = {
        name: null,
        a: []
      };
      aa.name = list.words[j];
      for (var k = 0; k < list.data.length; k++) {
        if (list.words[j] == list.data[k].word) {
          aa.a.push(list.data[k]);
        }
      }
      arr.push(aa)
    }
    this.setData({
      personnelArr: arr,
    })
    // console.log(arr)
  },
})

原文地址：https://www.cnblogs.com/D-deng/p/11447939.html