114 lines
3.3 KiB
TypeScript
114 lines
3.3 KiB
TypeScript
import React, { useEffect, useRef } from 'react';
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import { Animated, StyleSheet, View } from 'react-native';
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const Loading = () => {
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// 创建三个动画值，控制每个点的大小变化
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const anim1 = useRef(new Animated.Value(0)).current;
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const anim2 = useRef(new Animated.Value(0)).current;
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const anim3 = useRef(new Animated.Value(0)).current;
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// 定义动画序列
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const startAnimation = () => {
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// 重置动画值
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anim1.setValue(0);
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anim2.setValue(0);
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anim3.setValue(0);
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// 创建动画序列
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Animated.loop(
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Animated.stagger(200, [
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// 第一个点动画
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Animated.sequence([
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Animated.timing(anim1, {
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toValue: 1,
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duration: 400,
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useNativeDriver: true,
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}),
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Animated.timing(anim1, {
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toValue: 0,
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duration: 400,
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useNativeDriver: true,
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}),
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]),
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// 第二个点动画
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Animated.sequence([
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Animated.timing(anim2, {
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toValue: 1,
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duration: 400,
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useNativeDriver: true,
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}),
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Animated.timing(anim2, {
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toValue: 0,
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duration: 400,
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useNativeDriver: true,
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}),
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]),
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// 第三个点动画
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Animated.sequence([
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Animated.timing(anim3, {
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toValue: 1,
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duration: 400,
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useNativeDriver: true,
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}),
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Animated.timing(anim3, {
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toValue: 0,
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duration: 400,
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useNativeDriver: true,
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}),
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]),
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])
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).start();
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};
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useEffect(() => {
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startAnimation();
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return () => {
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// 清理动画
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anim1.stopAnimation();
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anim2.stopAnimation();
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anim3.stopAnimation();
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};
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}, []);
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// 颜色插值
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const color1 = anim1.interpolate({
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inputRange: [0, 0.5, 1],
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outputRange: ['#999999', '#4C320C', '#999999'],
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});
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const color2 = anim2.interpolate({
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inputRange: [0, 0.5, 1],
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outputRange: ['#999999', '#4C320C', '#999999'],
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});
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const color3 = anim3.interpolate({
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inputRange: [0, 0.5, 1],
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outputRange: ['#999999', '#4C320C', '#999999'],
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});
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return (
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<View style={styles.container}>
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<Animated.View style={[styles.dot, { backgroundColor: color1 }]} />
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<Animated.View style={[styles.dot, { backgroundColor: color2 }]} />
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<Animated.View style={[styles.dot, { backgroundColor: color3 }]} />
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</View>
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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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flexDirection: 'row',
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alignItems: 'center',
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justifyContent: 'center',
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padding: 16,
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},
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dot: {
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width: 8,
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height: 8,
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borderRadius: 4,
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marginHorizontal: 4,
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backgroundColor: '#999999',
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},
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});
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export default Loading; |