javascript - -React Native，从A.js到B.js传递状态数据的方式是什么

Question

我正在寻找将状态数据从 A.js 传递到 B.js 的方法

so I want to retrieve "DEF " as title[1] from A.js to B.js

A.js

export default class A extends Component {
constructor(props) {
    super(props)
    this.state = {
        title: ["ABC","DEF","GHI"]
    };
}
render(){return(<Text>{this.state.title[1]}</Text>)}
module.exports = A;

B.js

import {A} from "./A"  
export default class B extends Component {
render(){return(<Text>{A.state.title[1]?? // not sure about this part 
 }</Text>)}
}

Answer 1

为您定制:

import {B} from './B'
export default class A extends Component {
constructor(props) {
    super(props)
    this.state = {
        title: ["ABC","DEF","GHI"]
    };
}
render(){return(<B titlePropForB={this.state.title})}
module.exports = A;


export default class B extends Component {
render(){
console.log(this.props.titlePropForB);
return(<Text>{this.props.titlePropForB[1]}</Text>)}
}