react父组件调用子组件方法
父组件中通过react.CreateRef()声明一个ref,将声明的变量绑定到标签的ref中,那么该变量的current则指向绑定的标签dom。
父组件
import React, { useState } from 'react';import List from "./../List/index.jsx"
function Home (){
const billPictureRef = React.createRef();
const [list, setList] = useState([{
id:'1',
name:'葡萄'
},{
id:'2',
name:'西红柿'
}]);
const fn =()=>{
billPictureRef.current.handClick()
}
return (
<div onClick={fn}>
<List list={list} ref={billPictureRef}/>
</div>
)
}
export default Home
子组件
import React from 'react';class List extends React.Component {
constructor(props){
super(props);
this.state = {}
}
handClick=()=>{
console.log(1);
}
render(){
const { list } = this.props
return (
<ul>
{
list && list.map(item=>{
return <li key={item.id} >{item.name}</li>
})
}
</ul>
)
}
}
export default List
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