将多个引用传递给子组件

Question

在深入到主要问题之前，我的用例是我试图将滚动处理到所需的部分。我将在左边有导航，在右边有相对于这些导航的表单部分列表。Navigation和Form Section是子组件。以下是我如何构建我的代码

Parent.js

const scrollToRef = ref => window.scrollTo(0, ref.current.offsetTop);
const Profile = () => {
const socialRef = React.useRef(null);
const smsRef = React.useRef(null);
const handleScroll = ref => {
console.log("scrollRef", ref);
scrollToRef(ref);
};
return (
<>
<Wrapper>
<Grid>
<Row>
<Col xs={12} md={3} sm={12}>
<Navigation
socialRef={socialRef}
smsRef={smsRef}
handleScroll={handleScroll}
/>
</Col>
<Col xs={12} md={9} sm={12}>
<Form
socialRef={socialRef}
smsRef={smsRef}
/>
</Col>
</Row>
</Grid>
</Wrapper>
</>
);
};

Navigation.js(child component)我尝试使用forwardRef，但它似乎只接受一个参数作为ref，尽管我有多个ref。

const Navigation = React.forwardRef(({ handleScroll }, ref) => {
// it only accepts on ref argument
const items = [
{ id: 1, name: "Social connections", pointer: "social-connections", to: ref }, // socialRef
{ id: 2, name: "SMS preference", pointer: "sms", to: ref }, // smsRef
];
return (
<>
<Box>
<UL>
{items.map(item => {
return (
<LI
key={item.id}
active={item.active}
onClick={() => handleScroll(item.to)}
>
{item.name}
</LI>
);
})}
</UL>
</Box>
</>
);
});
export default Navigation;

Form.js我不知道在使用forwardRef时传递多个refs，所以对于表单部分，我将refs作为简单的道具传递。

const Form = ({ socialRef, smsRef }) => {
return (
<>
<Formik initialValues={initialValues()}>
{({ handleSubmit }) => {
return (
<form onSubmit={handleSubmit}>
<Social socialRef={socialRef} />
<SMS smsRef={smsRef} />
</form>
);
}}
</Formik>
</>
);
};

Social.js

const Social = ({ socialRef }) => {
return (
<>
<Row ref={socialRef}>
<Col xs={12} md={3}>
<Label>Social connections</Label>
</Col>
<Col xs={12} md={6}></Col>
</Row>
</>
);
};

有人能帮我传递多个引用吗？所以当点击特定的导航项时，它应该把我滚动到它各自的组件(部分(。

Answer 1

我在下面添加了一个示例。我还没有对此进行测试。这只是一个想法。

import React, { createContext, useState, useContext, useRef, useEffect } from 'react'
export const RefContext = createContext({});
export const RefContextProvider = ({ children }) => {
const [refs, setRefs] = useState({});
return <RefContext.Provider value={{ refs, setRefs }}>
{children}
</RefContext.Provider>;
};
const Profile = ({ children }) => {
// ---------------- Here you can access refs set in the Navigation
const { refs } = useContext(RefContext);
console.log(refs.socialRef, refs.smsRef);
return <>
{children}
</>;
};
const Navigation = () => {
const socialRef = useRef(null);
const smsRef = useRef(null);
const { setRefs } = useContext(RefContext);
// --------------- Here you add the refs to context
useEffect(() => {
if (socialRef && smsRef) {
setRefs({ socialRef, smsRef });
}
}, [socialRef, smsRef, setRefs]);
return <>
<div ref={socialRef}></div>
<div ref={smsRef}></div>
</>
};

export const Example = () => {
return (
<RefContextProvider>
<Profile>
<Navigation />
</Profile>
</RefContextProvider>
);
};