antd-vue （数选择加图标+treeIcon的配置）==》巨坑，文档里完全没有

效果图：

1.代码部分

 <a-tree-select
            style=" 100%"
            treeIcon
            :treeData="treeData"
            v-model="value"
            treeCheckable
            :showCheckedStrategy="SHOW_PARENT"
            searchPlaceholder="Please select"
        >
           <template  slot-scope="text" slot="title">
                <a-icon type='cluster'/>
                {{text.value}}
            </template>

        </a-tree-select>

2.数据部分

　　

const SHOW_PARENT = TreeSelect.SHOW_PARENT;

  const treeData = [
    {
      
      value: '0-0',
      key: '0-0',
      scopedSlots: {
            title: 'title'
        },
    
      children: [
        {
          title: 'Child Node1',
          value: '0-0-0',
          key: '0-0-0',
            
        },
      ],
    },
    {
      title: 'Node2',
      value: '0-1',
      key: '0-1',
      children: [
        {
          title: 'Child Node3',
          value: '0-1-0',
          key: '0-1-0',
          disabled: true,
        },
        {
          title: 'Child Node4',
          value: '0-1-1',
          key: '0-1-1',
        },
        {
          title: 'Child Node5',
          value: '0-1-2',
          key: '0-1-2',
        },
      ],
    },
  ];