嘿，我正在制作一个联系人页面，其中当前登录用户的电子邮件和联系人将从数据库中动态可用，并且他能够通过联系人页面发送他的消息。但是我不能在消息或任何其他输入框中输入任何数据，并且获得"Uncaught TypeError: object is not iterable(不能读取属性Symbol(Symbol.iterator)))在handleInput"。如何解决这个问题?
这是代码:
import React, { useEffect, useState } from "react";
import "bootstrap/dist/css/bootstrap.css";
import "bootstrap";
import { NavLink, useNavigate } from "react-router-dom";
import "../css/contact.css";
const Contact = ()=>{
const [userData, setUserData] = useState({name:"", email:"", phone:"", message:""});
const userContact = async() =>{
try {
const res = await fetch("/getdata",{
method: "GET",
headers: {
"Content-Type" : "application/json"
},
});
const data = await res.json();
console.log(data);
setUserData({...userData, name:data.name, email: data.email, phone: data.phone});
if(!res.status === 200){
const error = new Error(res.error);
throw error;
}
} catch (err) {
console.log(err);
}
}
useEffect(()=>{
userContact();
}, []);
const handleInputs = (event)=>{
const [name, value] = event.target;
setUserData({...userData, [name]:value});
}
const ContactForm = async(event)=>{
event.preventDefault();
const {name, email, phone, message} = userData;
const res = await fetch("/contact",{
method: "GET",
headers: {
"Content-Type" : "application/json"
},
body: JSON.stringify({
name, email, phone, message
})
});
const data = await res.json();
if(!data){
console.log("message not send");
}else{
alert("Message Sent");
setUserData({...userData, message:""});
}
}
//sending data to backend
return (
<section class="mb-4">
<div className="container mt-5">
{/* <!--Section heading--> */}
<h2 class="h1-responsive font-weight-bold text-center my-4">Contact us</h2>
{/* <!--Section description--> */}
<p class="text-center w-responsive mx-auto mb-5">Do you have any questions? Please do not hesitate to contact us directly. Our team will come back to you within
a matter of hours to help you.</p>
<div class="row">
{/* <!--Grid column--> */}
<div class="col-md-9 mb-md-0 mb-5">
<form id="contact-form" name="contact-form" method="POST">
{/* <!--Grid row--> */}
<div class="row">
{/* <!--Grid column--> */}
<div class="col-md-6">
<div class="md-form mb-0">
<input type="text" id="name" name="name" class="form-control"
value={userData.name}
onChange={handleInputs} />
<label for="name" class="">Your name</label>
</div>
</div>
{/* <!--Grid column--> */}
{/* <!--Grid column--> */}
<div class="col-md-6">
<div class="md-form mb-0">
<input type="text" id="phone" name="phone" class="form-control"
value={userData.phone}
onChange={handleInputs} />
<label for="phone" class="">Phone no:</label>
</div>
</div>
{/* <!--Grid column--> */}
</div>
{/* <!--Grid row--> */}
{/* <!--Grid row--> */}
<div class="row">
<div class="col-md-12">
<div class="md-form mb-0">
<input type="text" id="email" name="email" class="form-control"
value={userData.email}
onChange={handleInputs} />
<label for="email" class="">Your email</label>
</div>
</div>
</div>
{/* <!--Grid row--> */}
{/* <!--Grid row--> */}
<div class="row">
{/* <!--Grid column--> */}
<div class="col-md-12">
<div class="md-form">
<textarea type="text" name="message" rows="2" class="form-control md-textarea"
value={userData.message}
onChange={handleInputs}
></textarea>
<label for="message">Your message</label>
</div>
</div>
</div>
{/* <!--Grid row--> */}
</form>
<div class="text-center text-md-left">
<NavLink className="btn btn-primary buttn" onClick={ContactForm}>Send</NavLink>
</div>
<div class="status"></div>
</div>
{/* <!--Grid column--> */}
{/* <!--Grid column--> */}
<div class="col-md-3 text-center">
<ul class="list-unstyled mb-0">
<li><i class="fas fa-map-marker-alt fa-2x"></i>
<p>San Francisco, CA 94126, USA</p>
</li>
<li><i class="fas fa-phone mt-4 fa-2x"></i>
<p>+ 01 234 567 89</p>
</li>
<li><i class="fas fa-envelope mt-4 fa-2x"></i>
<p>contact@portfolio.com</p>
</li>
</ul>
</div>
{/* <!--Grid column--> */}
</div>
</div>
</section>
)
}
export default Contact;您可能想使用对象解构而不是数组解构:
const { name, value } = event.target;
因为这里使用数组解构是有点像这样:
const name = event.target[0];
const value = event.target[1];
这显然是不正确的，因为event.target是一个文本区域。