1、父组件向子组件传递参数
class Child extends Component {
componentDidMount(){
let name = this.props.default;
console,log(name);
}
render(){
const { default} = this.props;
return (
<Input />
)
}
}
import React, { Component } from 'react'; import Child from './Child'; class Parent extends Component { state = { name: 'Bob' } render() { return ( <div> <Child default={this.state.name} /> </div> ) } }
2、子组件向父组件传递参数
class Child extends Component {
state={
name:'Bob'
} componentDidMount(){
this.props.toParent(this.state.name);
} render(){ return ( <Input /> ) } }
import React, { Component } from 'react'; import Child from './Child'; class Parent extends Component {
state = {
name:''
} getChildInfo = (name)=>{
this.setState({name:name});
} render() { return ( <div> <Child toParent={this.getChildInfo.bind(this)} /> </div> ) } }