react组件之间的参数传递

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> ) } }

 

posted @ 2017-09-04 18:39  壹然  阅读(5349)  评论(0编辑  收藏  举报