数据处理的几种方式总结

1.如何获取目录子级的id来进行传值

效果图和数据格式：

数据格式：

answers: [
{
    label:"顶级目录",
    value:"undefined",
    key:1
    children:[
        {
            label:'二级目录',
            value:'undefined'
            key:2,
            children:[
                {
                    label:'子级目录',
                    value:'ed1eb230-6549-11e8-bf8a-2f7bf305f9b8',
                    key:3
                }
            ]
        }
    ]
}
]

 注：key值得唯一性

解决思路：递归函数=>满足条件，跳出

 let xz_ml = this.state.xz_ml;
    let ml_arr = [];
    let selectKeyArr_arr = this.state && this.state.selectKeyArr;//目录key值
    const ml = (data) => {
      data && data.map((item, index) => {
        console.log(item.children,'item.children');
        //!item.children是最子级节点。不满足提交走else继续调用自身，直到满足条件
        if (!item.children) {
          if (selectKeyArr_arr && (selectKeyArr_arr.indexOf(item.key) != -1)) { 
            item.value && ml_arr.push(item.value)
          }
        } else {
          ml(item.children);
        }
      })
    }
    console.log(answers,'answers');
    console.log(selectKeyArr_arr,'selectKeyArr_arr');
    console.log(xz_ml,'zzz');
    if (xz_ml == "顶级目录") {
      ml(answers);
    }