106 строки
2.4 KiB
JavaScript
106 строки
2.4 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @flow
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*/
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'use strict';
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const React = require('react');
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const {ProgressViewIOS, StyleSheet, View} = require('react-native');
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type Props = {||};
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type State = {|
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progress: number,
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|};
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class ProgressViewExample extends React.Component<Props, State> {
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_rafId: ?AnimationFrameID = null;
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state = {
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progress: 0,
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};
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componentDidMount() {
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this.updateProgress();
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}
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componentWillUnmount() {
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if (this._rafId != null) {
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cancelAnimationFrame(this._rafId);
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}
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}
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updateProgress = () => {
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const progress = this.state.progress + 0.01;
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this.setState({progress});
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this._rafId = requestAnimationFrame(() => this.updateProgress());
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};
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/* $FlowFixMe(>=0.85.0 site=react_native_fb) This comment suppresses an error
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* found when Flow v0.85 was deployed. To see the error, delete this comment
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* and run Flow. */
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getProgress = offset => {
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const progress = this.state.progress + offset;
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return Math.sin(progress % Math.PI) % 1;
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};
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render() {
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return (
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<View style={styles.container}>
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<ProgressViewIOS
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style={styles.progressView}
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progress={this.getProgress(0)}
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/>
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<ProgressViewIOS
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style={styles.progressView}
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progressTintColor="purple"
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progress={this.getProgress(0.2)}
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/>
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<ProgressViewIOS
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style={styles.progressView}
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progressTintColor="red"
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progress={this.getProgress(0.4)}
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/>
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<ProgressViewIOS
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style={styles.progressView}
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progressTintColor="orange"
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progress={this.getProgress(0.6)}
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/>
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<ProgressViewIOS
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style={styles.progressView}
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progressTintColor="yellow"
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progress={this.getProgress(0.8)}
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/>
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</View>
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);
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}
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}
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const styles = StyleSheet.create({
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container: {
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marginTop: -20,
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backgroundColor: 'transparent',
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},
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progressView: {
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marginTop: 20,
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},
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});
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exports.displayName = (undefined: ?string);
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exports.framework = 'React';
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exports.title = 'ProgressViewIOS';
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exports.description = 'ProgressViewIOS';
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exports.examples = [
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{
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title: 'ProgressViewIOS',
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render() {
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return <ProgressViewExample />;
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},
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},
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];
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