76 lines
2.0 KiB
JavaScript
76 lines
2.0 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule AppStateIOSExample
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* @flow
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*/
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'use strict';
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var React = require('react-native');
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var {
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AppStateIOS,
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Text,
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View
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} = React;
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var AppStateSubscription = React.createClass({
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getInitialState() {
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return {
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appState: AppStateIOS.currentState,
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previousAppStates: [],
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};
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},
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componentDidMount: function() {
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AppStateIOS.addEventListener('change', this._handleAppStateChange);
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},
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componentWillUnmount: function() {
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AppStateIOS.removeEventListener('change', this._handleAppStateChange);
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},
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_handleAppStateChange: function(appState) {
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var previousAppStates = this.state.previousAppStates.slice();
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previousAppStates.push(this.state.appState);
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this.setState({
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appState,
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previousAppStates,
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});
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},
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render() {
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if (this.props.showCurrentOnly) {
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return (
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<View>
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<Text>{this.state.appState}</Text>
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</View>
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);
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}
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return (
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<View>
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<Text>{JSON.stringify(this.state.previousAppStates)}</Text>
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</View>
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);
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}
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});
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exports.title = 'AppStateIOS';
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exports.description = 'iOS app background status';
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exports.examples = [
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{
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title: 'AppStateIOS.currentState',
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description: 'Can be null on app initialization',
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render() { return <Text>{AppStateIOS.currentState}</Text>; }
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},
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{
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title: 'Subscribed AppStateIOS:',
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description: 'This changes according to the current state, so you can only ever see it rendered as "active"',
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render(): ReactElement { return <AppStateSubscription showCurrentOnly={true} />; }
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},
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{
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title: 'Previous states:',
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render(): ReactElement { return <AppStateSubscription showCurrentOnly={false} />; }
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},
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];
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