react-native-fast-image/example/fastImage/PriorityExample.js

60 lines
1.6 KiB
JavaScript

import React from 'react'
import { PixelRatio, StyleSheet, View } from 'react-native'
import withCacheBust from './withCacheBust'
import FastImage from 'react-native-fast-image'
import Section from './Section'
import SectionFlex from './SectionFlex'
import FeatureText from './FeatureText'
const getImageUrl = (id, width, height) =>
`https://source.unsplash.com/${id}/${width}x${height}`
const IMAGE_SIZE = 1024
const IMAGE_SIZE_PX = PixelRatio.getPixelSizeForLayoutSize(IMAGE_SIZE)
const IMAGE_URLS = [
getImageUrl('x58soEovG_M', IMAGE_SIZE_PX, IMAGE_SIZE_PX),
getImageUrl('yPI7myL5eWY', IMAGE_SIZE_PX, IMAGE_SIZE_PX),
getImageUrl('S7VCcp6KCKE', IMAGE_SIZE, IMAGE_SIZE),
]
const PriorityExample = ({ onPressReload, bust }) => (
<View>
<Section>
<FeatureText text="• Prioritize images (low, normal, high)." />
</Section>
<SectionFlex onPress={onPressReload}>
<FastImage
style={styles.image}
source={{
uri: IMAGE_URLS[0] + bust,
priority: FastImage.priority.low,
}}
/>
<FastImage
style={styles.image}
source={{
uri: IMAGE_URLS[1] + bust,
priority: FastImage.priority.normal,
}}
/>
<FastImage
style={styles.image}
source={{
uri: IMAGE_URLS[2] + bust,
priority: FastImage.priority.high,
}}
/>
</SectionFlex>
</View>
)
const styles = StyleSheet.create({
image: {
flex: 1,
height: 100,
backgroundColor: '#ddd',
margin: 10,
},
})
export default withCacheBust(PriorityExample)