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perf(use-native-driver): useNativeDriver for fade animation #33

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merged 1 commit into from
Dec 18, 2017
Merged

perf(use-native-driver): useNativeDriver for fade animation #33

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1 change: 1 addition & 0 deletions Example/package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@
"expo": "^21.0.0",
"react": "16.0.0-alpha.12",
"react-native": "^0.48.4",
"react-native-scripts": "^1.8.1",
"rn-placeholder": "file:../rn-placeholder"
},
"devDependencies": {
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14 changes: 10 additions & 4 deletions src/animation/fade.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,22 +2,28 @@ import React from 'react';
import { Animated } from 'react-native';
import PropTypes from 'prop-types';

const START_VALUE = 0.5;
const END_VALUE = 1;
const DURATION = 500;
const useNativeDriver = true;

/**
* Create a repetitive fadein / fadeout animation
*/
const Fade = ({ children }) => {
const START_VALUE = 0.5;
const animation = new Animated.Value(START_VALUE);

function start() {
Animated.sequence([
Animated.timing(animation, {
toValue: 1,
duration: 500,
toValue: END_VALUE,
duration: DURATION,
useNativeDriver,
}),
Animated.timing(animation, {
toValue: START_VALUE,
duration: 500,
duration: DURATION,
useNativeDriver,
}),
]).start((e) => {
if (e.finished) {
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12 changes: 8 additions & 4 deletions src/animation/shine.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,10 @@ import React from 'react';
import { Animated, View, StyleSheet } from 'react-native';
import PropTypes from 'prop-types';

const START_VALUE = 0;
const END_VALUE = 100;
const DURATION = 750;

const styles = StyleSheet.create({
shine: {
width: 30,
Expand All @@ -18,11 +22,11 @@ const Shine = ({ children }) => {
const animation = new Animated.Value(0);

function start() {
animation.setValue(0);
animation.setValue(START_VALUE);
Animated.sequence([
Animated.timing(animation, {
toValue: 100,
duration: 750,
toValue: END_VALUE,
duration: DURATION,
}),
]).start(() => {
start();
Expand All @@ -32,7 +36,7 @@ const Shine = ({ children }) => {
start();

const marginLeft = animation.interpolate({
inputRange: [0, 100],
inputRange: [START_VALUE, END_VALUE],
outputRange: ['0%', '100%'],
});

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