71 lines
2.2 KiB
TypeScript
71 lines
2.2 KiB
TypeScript
import * as Haptics from 'expo-haptics';
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import * as MediaLibrary from 'expo-media-library';
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import React, { useRef } from 'react';
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import { Alert, StyleSheet, TouchableOpacity, View } from 'react-native';
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import QRCode from 'react-native-qrcode-svg';
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import { captureRef } from 'react-native-view-shot';
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export default function QRDownloadScreen(prop: { url: string }) {
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const qrViewRef = useRef<View>(null); // 用于截图的引用
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const [qrValue] = React.useState(prop.url); // 二维码内容
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const saveQRToGallery = async () => {
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try {
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// 触发轻震，提升交互感
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await Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Light);
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// 请求相册写入权限
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const { status } = await MediaLibrary.requestPermissionsAsync();
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if (status !== 'granted') {
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Alert.alert('权限被拒绝', '需要保存图片到相册的权限');
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return;
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}
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if (!qrViewRef.current) return;
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// 截取二维码视图
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const uri = await captureRef(qrViewRef, {
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format: 'png',
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quality: 1,
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result: 'tmpfile', // 返回临时文件路径
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});
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// 保存到相册
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await MediaLibrary.saveToLibraryAsync(uri);
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Alert.alert('✅ 成功', '二维码已保存到相册！');
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} catch (error) {
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console.error('保存失败:', error);
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Alert.alert('❌ 失败', '无法保存图片，请重试');
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}
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};
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return (
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<View style={styles.container}>
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{/* 可截图的容器 */}
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<TouchableOpacity onLongPress={saveQRToGallery} activeOpacity={0.8}>
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<View ref={qrViewRef} style={styles.qrContainer}>
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<QRCode value={qrValue} size={200} />
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</View>
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</TouchableOpacity>
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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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// flex: 1,
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justifyContent: 'center',
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alignItems: 'center',
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},
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qrContainer: {
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padding: 16,
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backgroundColor: '#fff',
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borderRadius: 12,
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},
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tip: {
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marginTop: 20,
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color: '#666',
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fontSize: 14,
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},
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}); |