react typescript 父組件調用子組件

//父組件
import * as React from 'react'
import { Input } from 'antd'
const Search = Input.Search
import "./index.less"
import Child from "./compon/list"

interface IProps {
  MakeMoney?: () => void
  
}
export default class ProjectList extends React.Component<IProps>{
  constructor(props: IProps) {
    super(props)
    
  }
　　

child: any = {}  //主要加這個
onRef = (ref) => {
  this.child = ref
}
// 調用組件進行通信
getDS  = () => {
  this.child.toggle()
  
}

render(){
  return (
　　<div>
　　　　<button onClick={this.getDS}>父組件點擊切換</button>

　　　　<Child ref={this.onRef} />

　　</div>

)
}

}

//子組件

import * as React from 'react'
import { Row, Col } from 'antd';
import "./list.less"

interface IProps {
 msg?: any
  MakeMoney?:any
  //ref?:any
  
}
interface IState {
  lg?: any
  
}export  default class List extends React.Component<IProps, IState>   constructor(props: IProps) {

    super(props)
    
  }
  state = {
    lg: 6
  }
  toggle = () => {//父組件要調用的方法
    console.log('f')
      this.setState({
        lg: 12
      })
  }
 
  StudyMakeMoney=()=>{ // 調用父組件方法
    this.props.MakeMoney();
  }
  render(){
   const { lg } = this.state;
    return (
      <div>
　　<button onClick={this.StudyMakeMoney}>子組件</button

　　</div>

　　）
}