以下是TextareaItem的antd-mobile示例,
我想用React Hooks重写它,
这是我的半成品代码:
import React, { useState, useEffect} from "react"
import { List, TextareaItem } from 'antd-mobile';
import { createForm } from 'rc-form';
function TextareaItemExample {
useEffect(() => {
//this.autoFocusInst.focus();
});
return (
<div>
<List renderHeader={() => 'Customize to focus'}>
<TextareaItem
title="title"
placeholder="auto focus in Alipay client"
data-seed="logId"
ref={el => this.autoFocusInst = el}
autoHeight
/>
<TextareaItem
title="content"
placeholder="click the button below to focus"
data-seed="logId"
autoHeight
/>
</List>
</div>
);
}
const TextareaItemExampleWrapper = createForm()(TextareaItemExample);
export default TextareaItemExampleWrapper;
问题:
1,如何使用React Hooks获取TextareaItem
的值?获取这些值后我将发送ajax请求。有一个自定义钩子react-use-form-state,但是它作用于html表单,如何执行相同的操作在Antd Form上发生了什么?
2,如何在功能组件中修改句子this.autoFocusInst.focus();
?
答案 0 :(得分:1)
为了使用ref,可以使用useRef钩子。通过提供第二个参数作为空数组,也可以使useEffect的行为类似于componentDidMount
。使用受控的TextAreaItem,您也可以使状态值保持不变。
import React, { useState, useEffect, useRef} from "react"
import { List, TextareaItem } from 'antd-mobile';
import { createForm } from 'rc-form';
function TextareaItemExample {
const [title, setTitle] = useState();
const [content, setContent] = useState();
const handleTitleChange = (value) => {
setTitle(value);
}
const handleContentChange = (value) => {
setContent(value)
}
const autoFocusInt = useRef();
useEffect(() => {
autoFocusInst.current.focus();
}, []);
return (
<div>
<List renderHeader={() => 'Customize to focus'}>
<TextareaItem
title="title"
value={title}
onChange={handleTitleChange}
placeholder="auto focus in Alipay client"
data-seed="logId"
ref={autoFocusInst}
autoHeight
/>
<TextareaItem
title="content"
value={content}
onChange={handleContentChange}
placeholder="click the button below to focus"
data-seed="logId"
autoHeight
/>
</List>
</div>
);
}
const TextareaItemExampleWrapper = createForm()(TextareaItemExample);
export default TextareaItemExampleWrapper;
如果您不将其设为受控输入,则可能可以使用ref来获取值。