Question

我有以下从API提取中返回的对象

{
 id: 1,
 name: "Leanne Graham",
 zipcode: "92998-3874",
 username: "Bret",
 email: "Sincere@april.biz",
 ..... (only the ones above matter to me) 
}

我只希望提取对象的某些部分（例如邮政编码）。我尝试了以下操作：this.props.users.zipcode JSON.parse JSON.stringify，但是在登录控制台时，它们全部都返回undefined。你介意帮我吗？

Answer 1

我从您的评论中得知您正在使用Redux。

API提取的结果应该是一个动作。在关联的化简器中，您需要检索成功请求触发的操作的有效负载。

正如其他人之前指出的那样，如果您提供了代码示例，那么答案将更容易，而不仅仅是在黑暗中开火

Answer 2

仅考虑数据，以下可能的解决方案将帮助您获取键的值。

import React, {Component} from 'react';
export default class Test extends Component {
  render(){
    let data = [{"id":1,"name":"Leanne Graham","username":"Bret","email":"Sincere@april.biz","address":{"street":"Kulas Light","suite":"Apt. 556","city":"Gwenborough","zipcode":"92998-3874","geo":{"lat":"-37.3159","lng":"81.1496"}},"phone":"1-770-736-8031 x56442","website":"hildegard.org","company":{"name":"Romaguera-Crona","catchPhrase":"Multi-layered client-server neural-net","bs":"harness real-time e-markets"}}]
    data.map((d, i) => {
      console.log("values", d.name, d.email, d.address.zipcode )
    });

    return(
      <div>
      </div>
    )
  }

}

或

import React, {Component} from 'react';
export default class Test extends Component {
  render(){
    if(this.props.users && this.props.users.map((d, i) => {
      console.log("values", d.name, d.email, d.address.zipcode )
    });

    return(
      <div>
      </div>
    )
  }
}

从json对象中提取键值组合

2 个答案: