我正在尝试在useEffect中获取一些数据,并且当接收到数据时,我想使用useState设置某个状态。数据正确地从服务器返回。但是,这不起作用。这是代码:
const [sharingLink, setSharingLink] = React.useState(null);
React.useEffect(() => {
client.query({
query: queryGetReferalData
}).then(result => {
console.warn(result); // correct response
setSharingLink(result.data.referralsystem.shareUrl);
console.warn(sharingLink); // null
});
}, []);
这是整个组成部分:
import React from 'react';
import styled from 'styled-components';
import { i18n } from 'Helpers';
import { Button } from './Button';
import { ButtonLink } from './ButtonLink';
import { Heading } from './Heading';
import { Input } from './Input';
import Copy from './icons/Copy';
import Facebook from './icons/Facebook';
import Twitter from './icons/Twitter';
import WhatsApp from './icons/WhatsApp';
import client from '@client/apollo';
import queryGetReferalData from './schemas/queryGetReferalData.graphql';
const Root = styled.div`
padding: 48px;
padding-top: 32px;
display: flex;
align-items: center;
justify-content: space-between;
box-shadow: 0px 10px 30px rgba(27, 50, 85, 0.1);
border-radius: 4px;
background-color: #FFFFFF;
`;
const Pane = styled.div`
`;
const Row = styled.div`
display: flex;
& > * + * {
margin-left: 10px;
}
`;
export const Form = () => {
const [sharingLink, setSharingLink] = React.useState(null);
const facebookSharingLink =
sharingLink && `https://www.facebook.com/sharer/sharer.php?${encodeURIComponent(sharingLink)}`;
const twitterSharingLink =
sharingLink && `http://www.twitter.com/share?url=${encodeURIComponent(sharingLink)}`;
const whatsAppSharingLink =
sharingLink && `whatsapp://send?text=${encodeURIComponent(sharingLink)}`;
React.useEffect(() => {
client.query({
query: queryGetReferalData
}).then(result => {
console.warn(result);
setSharingLink(result.data.referralsystem.shareUrl);
console.warn(sharingLink);
});
}, []);
return (
<Root>
<Pane>
<Heading>
{ i18n._('Your invitational link') }
</Heading>
<Row>
<Input disabled={sharingLink === null} value={sharingLink} />
<Button icon={<Copy />}>
{ i18n._('COPY') }
</Button>
</Row>
</Pane>
<Pane>
<Heading>
{ i18n._('Or share via social') }
</Heading>
<Row>
<ButtonLink
backgroundColor='#5A79B5'
icon={<Facebook />}
href={facebookSharingLink}
>
{ i18n._('Facebook') }
</ButtonLink>
<ButtonLink
backgroundColor='#52A6DB'
icon={<Twitter />}
href={twitterSharingLink}
>
{ i18n._('Twitter') }
</ButtonLink>
<ButtonLink
backgroundColor='#0DC455'
icon={<WhatsApp />}
href={whatsAppSharingLink}
>
{ i18n._('WhatsApp') }
</ButtonLink>
</Row>
</Pane>
</Root>
);
};
该组件也呈现为共享链接为null。
答案 0 :(得分:0)
我有一些代码要添加到父组件的DOM中。当我删除它时,一切正常。
添加到组件中的DOM无关紧要,不管它是否进入useEffect,即使您将HTML添加到完全不相关的东西,我都会以某种方式弄乱钩子。
我有这样的结构:
<body>
<div id="page">
<div id="root">
<CustomReactElement />
</div>
</div>
<body>
CustomReactElement中的代码向“页面”添加了标记。我将代码从将innerHTML设置为appendChild()更改,一切正常。