基于 Vue 的树形选择组件的示例代码

本文介绍了基于 Vue 的树形选择组件。分享给大家，具体如下：

系统要求：Vue 2

基本特性

完美的多级联动效果
支持无限多的分级
有全选、半选、不选三种状态

截图展示

代码如下：

 <!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <link rel="icon" href="https://v1-cn.vuejs.org/images/logo.png" rel="external nofollow" type="image/x-icon">
 <title>Vue Tree Select Example</title>
 <script src="https://cdn.bootcss.com/vue/2.4.2/vue.js"></script>
</head>
<body>

 <!-- 递归引用的模板 -->
 <template id="one-select" style="display: none;">
  <ul>
   <li v-for="(node, key, index) in tree">
    <div v-if="key != 'selected'">
     <div v-on:click="nodeClick(node, index)" v-bind:class="[node.selected == null ? 'tree-select-null' : (node.selected == 'half' ? 'tree-select-half' : 'tree-select-full'), 'tree-select', 'inline-block']"></div>
     
     <div class="inline-block">{{ key }}</div>
     <div v-if="key != ''">
      <one-select v-bind:tree="node" v-bind:isroot="false"></one-select>
     </div>
    </div>
   </li>
  </ul>
 </template>

 <!-- 整体树容器 -->
 <div id="tree">
  <one-select v-bind:isroot="true" v-bind:tree="tree"></one-select>
 </div>

<textarea id="treeDataJSON" style="display: none;">
{
 "客户管理": {
  "我的客户": {
   "新分配": {},
   "跟进中": {},
   "签单客户": {},
   "长期客户": {}
  },
  "长期客户权限": {
   "设为长期客户": {},
   "还原长期客户": {}
  }
 },
 "采购列表": {
  "添加异常客情": {},
  "添加采购单": {},
  "采购退货单列表": {},
  "供应商管理": {},
  "供应商联系人": {},
  "品牌列表": {
   "宝洁": {},
   "乐视": {
    "乐视网": {},
    "乐视手机": {
     "乐视手机 1": {},
     "乐视手机 2": {},
     "乐视手机 3": {},
     "乐视手机 4": {},
     "乐视手机 5": {
      "体验超深层级": {
       "继续体验超深层级": {
        "依然体验超深层级": {},
        "依然体验超深层级 2": {}
       }
      }
     }
    },
    "乐视电视": {}
   },
   "可口可乐": {},
   "圣象": {}
  }
 }
}
</textarea>

<script>
// 初始数据
var treeDataJSON = document.getElementById("treeDataJSON").value;
var treeData = JSON.parse(treeDataJSON);
Vue.component('one-select', {
 name: 'one-select',
 template: '#one-select',
 props: ['tree', 'isroot'],
 created: function() {
  var realTree = Object.assign({}, this.tree);
  delete realTree.selected;
  if (Object.keys(realTree).length === 0) { // 判断最低级，再刷新父级
   this.refreshAllParentNodes(this.$parent);
  }
 },
 methods: {
  nodeClick: function(node, index) {
   if (node.selected === 'full' || node.selected === 'half') {
    Vue.set(node, 'selected', null);
   } else {
    Vue.set(node, 'selected', 'full');
   }
   this.refreshAllParentNodes(self.$parent);
   this.refreshAllParentNodes(this);
   this.refreshAllSonNodes(this.$children[index], node.selected);
  },
  refreshAllSonNodes: function(node, status) {
   if (node instanceof Vue && node.$children.length) {
    for (index in node.$children) {
     Vue.set(node.$children[index].tree, 'selected', status);
     // 递归计算子级
     this.refreshAllSonNodes(node.$children[index], status);
    }
   }
  },
  refreshAllParentNodes: function(node) {
   if (node instanceof Vue) {
    var status = null;
    var nullCount = 0;
    var halfCount = 0;
    var fullCount = 0;
    for (index in node.$children) {
     if (typeof node.$children[index].tree.selected === 'undefined') {
      nullCount++;
     } else if (node.$children[index].tree.selected === null) {
      nullCount++;
     } else if (node.$children[index].tree.selected === 'half') {
      halfCount++;
     } else if (node.$children[index].tree.selected === 'full') {
      fullCount++;
     }
    }
    if (fullCount === node.$children.length) {
     status = 'full';
    } else if (nullCount === node.$children.length) {
     status = null;
    } else {
     status = 'half';
    }
    Vue.set(node.tree, 'selected', status);

    // 递归计算父级
    this.refreshAllParentNodes(node.$parent);
   }
  },
  log: function(o) {
   console.log(o);
  }
 }
});
vm = new Vue({
 el: '#tree',
 data: {
  tree: treeData
 },
 methods: {
  // 返回最终数据
  getResult: function() {
   return Object.assign({}, this.tree);
  }
 }
});
</script>

<style>
#tree {
 width: 500px;
 margin: 0 auto;
 margin-top: 50px;
}
li {
 list-style: none;
 line-height: 25px;
}
.inline-block {
 display: inline-block;
}
.tree-select {
 width: 13px;
 height: 13px;
 line-height: 16px;
 margin: 3px;
 display: inline-block;
 vertical-align: middle;
 border: 0 none;
 cursor: pointer;
 outline: none;
 background-color: transparent;
 background-repeat: no-repeat;
 background-attachment: scroll;
 background-image: url('selects.png');
}
.tree-select-null {
 background-position: 0 0;
}
.tree-select-full {
 background-position: -14px 0;
}
.tree-select-half {
 background-position: -14px -28px;
}
</style>

</body>
</html>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持呐喊教程。

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