121 lines
2.2 KiB
JavaScript
121 lines
2.2 KiB
JavaScript
import React from 'react';
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import PropTypes from 'prop-types';
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import {
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StyleSheet, View, Modal, Animated
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} from 'react-native';
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const styles = StyleSheet.create({
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container: {
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flex: 1,
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alignItems: 'center',
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justifyContent: 'center',
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backgroundColor: 'rgba(0, 0, 0, 0.25)'
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},
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image: {
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width: 100,
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height: 100,
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resizeMode: 'contain'
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}
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});
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export default class Loading extends React.PureComponent {
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static propTypes = {
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visible: PropTypes.bool.isRequired
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}
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state = {
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scale: new Animated.Value(1),
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opacity: new Animated.Value(0)
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}
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componentDidMount() {
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const { opacity, scale } = this.state;
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const { visible } = this.props;
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this.opacityAnimation = Animated.timing(
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opacity,
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{
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toValue: 1,
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duration: 1000,
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useNativeDriver: true
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}
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);
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this.scaleAnimation = Animated.loop(Animated.sequence([
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Animated.timing(
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scale,
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{
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toValue: 0,
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duration: 1000,
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useNativeDriver: true
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}
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),
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Animated.timing(
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scale,
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{
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toValue: 1,
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duration: 1000,
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useNativeDriver: true
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}
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)
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]));
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if (visible) {
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this.startAnimations();
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}
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}
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componentDidUpdate(prevProps) {
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const { visible } = this.props;
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if (visible && visible !== prevProps.visible) {
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this.startAnimations();
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}
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}
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componentWillUnmount() {
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if (this.opacityAnimation && this.opacityAnimation.stop) {
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this.opacityAnimation.stop();
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}
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if (this.scaleAnimation && this.scaleAnimation.stop) {
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this.scaleAnimation.stop();
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}
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}
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startAnimations() {
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if (this.opacityAnimation && this.opacityAnimation.start) {
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this.opacityAnimation.start();
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}
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if (this.scaleAnimation && this.scaleAnimation.start) {
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this.scaleAnimation.start();
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}
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}
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render() {
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const { opacity, scale } = this.state;
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const { visible } = this.props;
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const scaleAnimation = scale.interpolate({
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inputRange: [0, 0.5, 1],
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outputRange: [1, 1.1, 1]
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});
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return (
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<Modal
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visible={visible}
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transparent
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onRequestClose={() => {}}
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>
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<View style={styles.container}>
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<Animated.Image
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source={require('../static/images/logo.png')}
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style={[styles.image, {
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opacity,
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transform: [{
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scale: scaleAnimation
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}]
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}]}
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/>
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</View>
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</Modal>
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);
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}
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}
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