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React components talking / grandchild to child to parent.
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| import React from "react"; | |
| import { TouchableHighlight } from "react-native"; | |
| export class Parent extends React.Component { | |
| constructor(props) { | |
| super(props); | |
| this.state = { | |
| value: null | |
| }; | |
| // Remember to bind methods. | |
| this.setValue = this.setValue.bind(this); | |
| } | |
| // Parent callback. | |
| setValue(value) { | |
| // Do what you want with the data. | |
| this.setState({ | |
| value: value | |
| }); | |
| } | |
| render() { | |
| // Parent "setValue" callback will receive "value" data from Child. | |
| return <Child value={this.setValue} />; | |
| } | |
| } | |
| export class Child extends Component { | |
| constructor(props) { | |
| super(props); | |
| this.state = {}; | |
| // Remember to bind methods. | |
| this.setValue = this.setValue.bind(this); | |
| } | |
| // Child (also a parent) callback. | |
| setValue(value) { | |
| // Sets data for the its prop: "value", which then sets data for the Parent's callback "setValue". | |
| this.props.value(value); | |
| } | |
| render() { | |
| // Child (also Parent to Grandchild) "setValue" callback will receive "value" data from Grandchild. | |
| return <Grandchild value={this.setValue} />; | |
| } | |
| } | |
| export class Grandchild extends Component { | |
| render() { | |
| // On action, set data for the its prop: "value", which then sets data for the Child's (its parent) callback "setValue". | |
| return <TouchableHighlight onPress={ () => {this.props.value(9)} } />; | |
| } | |
| } |
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