react-native 类父组件调用子函数组件的方法

父组件 class 类组件, 关键代码我用红色部部分标记

import React from "react";
import { View,Text} from "react-native";
import HomeModalChilder from "../../components/homeModal/index";

export default class Modal extends React.Component{
    constructor(props) {
        super(props);
        this.containerRef = React.createRef()
    }
    clikbox=()=>{
        this.containerRef.current.showModal()
        console.log(this.containerRef.current, '-----')
    }
    render(){
        return(
            <View>
                <Text onPress={this.clikbox}>Modal</Text>
                <HomeModalChilder ref={this.containerRef}></HomeModalChilder>
            </View>
        )
    }
}

函数式子组件 

import React, { forwardRef, useImperativeHandle } from "react";
import { Text, View } from "react-native";

const APP = forwardRef((props, ref) => {
  const showModal = () => {
    alert('调用成功')
  }
  useImperativeHandle(ref, () => ({
    showModal,
  }))

  return (
    <View>
      <Text>我是函数式组件</Text>
    </View>
  );
})


export default APP;