react通过下拉框选择多个，并展示在下方的方式

以备后用，直接上代码：

一、方法：

//查询学校一级部门列表
    async orgFirstLevelList() {
        let data = {
            schoolId:this.state.schoolId
        };
        let depList = await orgFirstLevelList(data);
        this.setState({
            depList: depList
        })
    }
    //删除所选部门
    deleteDep(index) {
        let {selectDepList} = this.state;
        selectDepList.splice(index,1);
        this.setState({ selectDepList });
    }
    //添加所选部门
    addDep(e) {
        let orgName = null;
        let { depList,selectDepList} = this.state;
        //判断已添加列表中是否已存在
        for(let i = 0;i < selectDepList.length; ++i){
            if(selectDepList[i].id === e[0]) {
                this.mesWarning('该部门已添加过了，无需重复添加')
                return;
            }
        }
        for(let i = 0;i < depList.length; ++i){
            if(depList[i].id === e[0]) {
                orgName = depList[i].orgName;
                break;
            }
        }
        selectDepList.push({id:e[0], orgName:orgName});
        this.setState({ selectDepList: selectDepList});
        this.props.form.setFieldsValue({orgId:""})
    }

二、form及选择展示

<Form.Item label="所属部门">
{
     getFieldDecorator('depId', {
         rules: [
             {
              required: true,
              message: '请输入所属组织',
             },]
     })(
         <Cascader
         fieldNames={{label: 'orgName', value: 'id'}}
         options={depList}
         placeholder="请选择所属组织,支持多选"
         changeOnSelect
         onChange={(e) => this.addDep(e)}
         disabled={this.state.isLook}
         getPopupContainer={triggerNode => triggerNode.parentNode || document.body}
         />)}
</Form.Item>
  {selectDepList.length > 0?
    <Col span={24}>
    <div className="diyTag">
    {
      selectDepList.map((item,index)=>{
        return(
         <Tag key={index} id={item.id}>
         {item.orgName}
         <span onClick={() => this.deleteDep(index)}>
            {closeBtn}
         </span>
       </Tag>)
      })
    }
    </div>
    </Col>:""
}