Parent组件
import React from "react"; import Child from "./component/Child"; class Parent extends React.Component { render() { return ( <div> 我是父组件 <Child childEvevnt={this.childEvevnt} /> <button onClick={this.triggerEvevt}>触发子</button> </div> ); } // 此事件接收子对象 childEvevnt = childDate => { this.$child = childDate; }; // 父组件触发子组件的事件 triggerEvevt = () => { this.$child.alertEvevnt(); }; } export default Parent;
Child组件
import React from "react"; class Child extends React.Component { render() { return <div>我是子组件</div>; } componentDidMount() { this.props.childEvevnt(this); } // 父组件要触发的事件 alertEvevnt = () => { alert("父呼唤我呢!!"); }; } export default Child;
注意点:
1.使用箭头函数,小心this指向有差错
()=> { }
2.父组件通过props传参把子组件对象接收过来
<Child childEvevnt={this.childEvevnt} />
3.子组件内部进行传递
componentDidMount() {
this.props.childEvevnt(this);
}
4.父组件把接收过来的子对象绑定到父自定义事件上
childEvevnt = childDate => {
this.$child = childDate;
};
5.父组件内部触发子组件的事件
this.$child 上有了子组件的事件
6.触发
triggerEvevt = () => {
this.$child.alertEvevnt();
};
原文地址:https://www.cnblogs.com/PengZhao-Mr/p/11002869.html
时间: 2024-10-07 05:47:11