import React, {Component} from 'react';
export default class Parent extends Component {
render() {
return(
<div>
//1
<Child onRef={this.onRef} />
<button onClick={this.click} >click</button>
</div>
)
}
//2
onRef = (ref) => {
this.child = ref
}
//3
click = (e) => {
this.child.myName()
}
}
class Child extends Component {
componentDidMount(){
//4
this.props.onRef(this)
}
myName = () => alert('xiaohesong')
render() {
return ('woqu')
}
}
