嗨,我想保存我的回复.数据到我的数组状态的react ,但它从来没有存储正确的数组,但当我做一个临时数组,它的工作.
任何帮助都将不胜感激,谢谢!
const [allstudentlist, setAllStudentlist] = useState([]);
await Axios.post(currentUrl, params).then((res) => {
// if res.data[0][]
// if res data is there then ;
if (res.data["error"]) {
alert(res.data["error"]);
} else {
// alert("Register Successful");
// console.log(res.data[0]);
console.log(res.data);
// works
let temp = res.data;
setAllStudentlist(...temp);
// works
console.log(temp);
// returns an empty array
console.log(allstudentlist);
}
});
日期回复
我也try 过用一个假的api进行测试,但在react上设置数组似乎有问题
我试图用codeSandbox和一个假的API进行测试,但它不起作用
import "./styles.css";
import React, { Component, useState, useEffect } from "react";
import Axios from "axios";
export default function App() {
const [array2, setArray] = useState([]);
function handleClick() {
Axios.get("https://finalspaceapi.com/api/v0/character/?limit=2").then(
function (response) {
console.log(response.data);
setArray(response.data);
console.log(array2);
}
);
}
return (
<div className="App">
<h1>Hello CodeSandbox</h1>
<h2>Start editing to see some magic happen!</h2>
<button onClick={handleClick}></button>
</div>
);
}