微信小程序自定义tree组件，拿走直接用

工作原因，微信小程序需要一个功能类似于elemenui中的tree组件，找了好多ui组件库没有能直接用的，最后自己写了一套，封装成组件，中心技术是组件本身递归，只需要在父级页面传“树列表数据”和“选中的节点id”就可以用了。

tree组件

tree.wxml

<!--common/tree/tree.wxml-->
<view wx:for="{{tree}}" wx:key="deptId">
  <!-- 一级 -->
  <view style="margin-left: {{treeListIndex*24}}rpx" >
    <view  class="tree-item">
      <view bindtap="isOpen" data-index="{{index}}" wx:if="{{item.children && item.children.length > 0 || item.userList && item.userList.length>0}}" class="iconfont {{item.open ? 'icon-out' : 'icon-in'}}" style="color: #E6A23C;"></view>
      <view class="iconfont icon-in" wx:else style="color: #E6A23C;"></view>
      <view class="tree-item-name" >
        <text class="tree-item-title">{{item.deptName}}</text>
      </view>
    </view>
    <view wx:if="{{item.userList && item.userList.length>0 && item.open}}" class="tree-user-item" >
      <view wx:for="{{item.userList}}" wx:key="userId" class="tree-user-item-item" catchtouchmove="preventD" catchtap="select" data-item="{{item}}" data-index="{{index}}">
        <view class="tree-user-avater-item" >
          <view>{{item.nickName}}</view>
          <view>{{item.nickName}}</view>
        </view>
        <view class="iconfont icon-selin" wx:if="{{item.status == 1}}" style="color: #2677FC;"></view>
        <view class="iconfont icon-selout" wx:if="{{item.status == 0}}"></view>
      </view>
    </view>
  </view>
  <tree wx:if="{{item.children && item.children.length > 0 && item.open }}" ids="{{ ids }}"  treeData='{{ item.children }}' bind:getIds="nodeGetIds" data-index="{{index}}" data-node="{{item.children}}"  isOpenAll="{{true}}" treeListIndex="{{treeListIndex+1}}" />
</view>

tree.js

// common/tree/tree.js
const app = getApp()
Component({
  /**
   * 组件的属性列表
   */
  properties: {
    treeData: {
      type: Array,
      value: []
    },
    ids: {
      type: Array,
      value: [],
    },
    treeListIndex: {
      type: Number,
      value: 1
    },
    isOpenAll: { // 是否展开全部节点
      type: Boolean,
      value: true
    }
  },

  /**
   * 组件的初始数据
   */
  data: {
    tree: [],
  },
  observers: {
    'treeData':function(params) {
      this.setData({
        tree: this._init(params)
      })
    },
    'ids':function(params) {
      this.setData({
        tree: this._uploadTree(params, this.data.tree)
      })
    },
  },
  /**
   * 组件的方法列表
   */
  methods: {
    isOpen(e) {
      const open = 'tree[' + e.currentTarget.dataset.index + '].open'
      this.setData({
        [open]: !this.data.tree[e.currentTarget.dataset.index].open
      })
    },
    _init(node) {
      let that = this;
      node.forEach(element => {
        if(element.checked == undefined) element.checked = 0;
        element.open = this.properties.isOpenAll;
        if(element.children && element.children.length > 0) element.children = this._init(element.children)
      })
      return node
    },
    _uploadTree(ids, tree){
      tree.forEach(element => {
        if(element.userList && element.userList.length > 0) {
          element.userList.forEach(r => {
            if(ids.indexOf((Number(r.userId))) > -1) {
              r.status = 1
            } else {
              r.status = 0
            }
          })
        }
      })
      return tree
    },
    // 选择
    select(e) {
      let item = e.currentTarget.dataset.item
      this.triggerEvent('getIds', item.userId)
    },
    nodeGetIds(e) {
      this.triggerEvent('getIds', e.detail)
    }
  }
})

tree.wxss

/* common/tree/tree.wxss */
@import "/utils/iconFont.wxss";
.tree-item{
  display: flex;
  align-items: center;
  margin: 10rpx 0;
}
.tree-item-name{
  margin-left: 20rpx;
}
.tree-item-title{
  font-size: 32rpx;
  color: #303133;
}

.tree-user-item{
  /* display: flex;
  align-items: center; */
  margin: 20rpx 0;
  box-sizing: border-box;
}
.tree-user-item-item{
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 30rpx 0;
}
.tree-user-avater-item{
  display: flex;
  align-items: center;
  font-size: 32rpx;
  color: #303133;
}
.tree-user-avater-item>view:nth-of-type(1) {
  width: 64rpx;
  height: 64rpx;
  border-radius: 50%;
  font-size: 26rpx;
  color: #fff;
  text-align: center;
  line-height: 64rpx;
  margin-right: 10rpx;
  background-color: #2677FC;
}

tree.json

{
  "component": true,
  "usingComponents": {
    "tree": "/common/tree/tree"
  }
}

父级页面

sel-people.wxml

<tree treeData="{{treeData}}" ids="{{ids}}" treeListIndex="{{1}}" isOpenAll="{{true}}" bind:getIds="getIds"></tree>

sel-people.json

{
  "usingComponents": {
    "tree": "/common/tree/tree"
  }
}

sel-people.js

// pages/sel-people/sel-people.js
const app = getApp()
Page({

  /**
   * 页面的初始数据
   */
  data: {
    contentHeight: app.globalData.contentHeight,
    navColor: '#fff',
    title: '',
    backStatus: true,
    // 模拟接包时候的json数据
    treeData: [
        {
            "deptId": "1", 
            "deptName": "经建", 
            "userList": [
                {
                    "userId": 1, 
                    "userName": "admin", 
                    "nickName": "管理员"
                }, 
                {
                    "userId": 2, 
                    "userName": "corner", 
                    "nickName": "星辰"
                }
            ], 
            "children": [
                {
                    "deptId": "2", 
                    "deptName": "弘德云", 
                    "userList": [
                        {
                            "userId": 3, 
                            "userName": "admin1", 
                            "nickName": "管理员1"
                        }, 
                        {
                            "userId": 4, 
                            "userName": "corner1", 
                            "nickName": "星辰1"
                        }
                    ], 
                    "children": [
                      {
                        "deptId": "3", 
                        "deptName": "招投标", 
                        "userList": [
                          {
                            "userId": 5, 
                            "userName": "admin1", 
                            "nickName": "管理员2"
                        }, 
                        {
                            "userId": 10, 
                            "userName": "corner1", 
                            "nickName": "星辰2"
                        }
                        ]
                      }
                    ]
                }
            ]
        }
    ],
    ids: [1]
  },
    
  getIds(e) {
// 判断tree组件传过来的id，选中or未选中
    let id = e.detail
    if(this.data.ids.indexOf(Number(id)) > -1) {
      this.data.ids.splice(this.data.ids.indexOf(Number(id)), 1)
    } else {
      this.data.ids.push(Number(id))
    }
    this.setData({
      ids: this.data.ids
    })
    console.log(this.data.ids)
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad(options) {
  },

})

以下是tree组件需要的icon图标，自己去矢量库下载就好 

以下是成品图

 感谢大家！！！