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* ExpoCameraView - 相机视图主组件
*/
import React, { useCallback, useRef, useState } from 'react';
import { Animated, LayoutChangeEvent, StyleSheet, View } from 'react-native';
import { CameraType, CameraView } from 'expo-camera';
import * as Haptics from 'expo-haptics';
import { YStack } from 'tamagui';
import { ScanType } from '@/src/types/camera';
import type { ExpoBarcodeResult } from '@/src/types/camera';
import { CameraBottomBar } from './components/CameraBottomBar';
import { CameraControls } from './components/CameraControls';
import { ScanFrame } from './components/ScanFrame';
import { useZoomGesture } from './hooks/useZoomGesture';
// 支持的条码类型（与组件配置一致）
export const SUPPORTED_BARCODE_TYPES = [
'qr',
'ean13',
'ean8',
'code128',
'code39',
'upc_e',
'upc_a',
] as const;
// 防抖间隔（毫秒）
const SCAN_DEBOUNCE_TIME = 1000;
// EAN13格式校验（13位纯数字）
const isValidEAN13 = (data: string): boolean => {
return /^\d{13}$/.test(data);
};
// 通用条码数据校验
const isValidBarcodeData = (data: string | null | undefined, type: string): boolean => {
Iif (!data || data.trim() === '') return false;
if (!SUPPORTED_BARCODE_TYPES.includes(type as (typeof SUPPORTED_BARCODE_TYPES)[number])) {
return false;
}
if (type === 'ean13' && !isValidEAN13(data)) {
return false;
}
return true;
};
interface ExpoCameraViewProps {
cameraRef: React.RefObject<CameraView | null>;
facing: 'front' | 'back';
scanType: ScanType;
onClose: () => void;
onToggleCamera: () => void;
onToggleScanType: () => void;
onCameraReady: () => void;
onBarCodeScanned: (result: ExpoBarcodeResult) => void;
onTakePhoto: (
zoom?: number,
frameLayout?: { x: number; y: number; width: number; height: number } | null
) => void;
takePicture: (options?: {
quality?: number;
cropToScanFrame?: boolean;
zoom?: number;
frameLayout?: { x: number; y: number; width: number; height: number };
}) => Promise<{ uri: string } | null>;
debounceTime?: number;
}
export function ExpoCameraView({
cameraRef,
facing,
scanType,
onClose,
onToggleCamera,
onToggleScanType,
onCameraReady,
onBarCodeScanned,
onTakePhoto,
takePicture,
debounceTime = SCAN_DEBOUNCE_TIME,
}: ExpoCameraViewProps) {
// ============ 状态管理 ============
const [isCameraReady, setIsCameraReady] = useState(false);
const [zoom, setZoom] = useState(0);
const [scanFrameLayout, setScanFrameLayout] = useState<{
x: number;
y: number;
width: number;
height: number;
} | null>(null);
const [cameraViewLayout, setCameraViewLayout] = useState<{
x: number;
y: number;
width: number;
height: number;
} | null>(null);
const cameraViewRef = useRef<View>(null);
// 防抖相关
const lastScannedData = useRef<string | null>(null);
const lastScanTime = useRef<number>(0);
// 动画相关
const frameScale = useRef(new Animated.Value(1)).current;
const frameBorderWidth = useRef(new Animated.Value(2)).current;
// ============ Hooks ============
const { panResponder } = useZoomGesture({ zoom, setZoom });
// ============ 动画效果 ============
const playShutterAnimation = useCallback(() => {
Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Medium);
// 扫描框收缩动画
Animated.parallel([
Animated.sequence([
Animated.timing(frameScale, {
toValue: 0.85,
duration: 150,
useNativeDriver: true,
}),
Animated.spring(frameScale, {
toValue: 1,
friction: 5,
tension: 100,
useNativeDriver: true,
}),
]),
Animated.sequence([
Animated.timing(frameBorderWidth, {
toValue: 6,
duration: 150,
useNativeDriver: false,
}),
Animated.timing(frameBorderWidth, {
toValue: 2,
duration: 150,
useNativeDriver: false,
}),
]),
]).start();
}, [frameScale, frameBorderWidth]);
// ============ 事件处理 ============
const handleCameraReady = useCallback(() => {
setIsCameraReady(true);
onCameraReady();
}, [onCameraReady]);
const handleTakePhotoWithAnimation = useCallback(() => {
playShutterAnimation();
setTimeout(() => {
// 计算扫描框相对于相机视图的位置
Iif (scanFrameLayout && cameraViewLayout) {
console.log('\n🎬 拍照参数计算:');
console.log(' 扫描框（屏幕坐标）:', {
x: scanFrameLayout.x.toFixed(1),
y: scanFrameLayout.y.toFixed(1),
w: scanFrameLayout.width.toFixed(1),
h: scanFrameLayout.height.toFixed(1),
});
console.log(' 相机视图（屏幕坐标）:', {
x: cameraViewLayout.x.toFixed(1),
y: cameraViewLayout.y.toFixed(1),
w: cameraViewLayout.width.toFixed(1),
h: cameraViewLayout.height.toFixed(1),
});
const relativeLayout = {
x: scanFrameLayout.x - cameraViewLayout.x,
y: scanFrameLayout.y - cameraViewLayout.y,
width: scanFrameLayout.width,
height: scanFrameLayout.height,
};
console.log(' 📐 扫描框（相对相机）:', {
x: relativeLayout.x.toFixed(1),
y: relativeLayout.y.toFixed(1),
w: relativeLayout.width.toFixed(1),
h: relativeLayout.height.toFixed(1),
});
onTakePhoto(zoom, relativeLayout);
} else {
console.warn('⚠️ 缺少布局信息:', { scanFrameLayout, cameraViewLayout });
onTakePhoto(zoom, scanFrameLayout);
}
}, 50);
}, [onTakePhoto, playShutterAnimation, zoom, scanFrameLayout, cameraViewLayout]);
const handleBarCodeScanned = useCallback(
(result: ExpoBarcodeResult) => {
Iif (scanType !== ScanType.BARCODE || !isCameraReady) return;
const { data, type } = result;
const currentTime = Date.now();
if (!isValidBarcodeData(data, type)) return;
if (lastScannedData.current === data && currentTime - lastScanTime.current < debounceTime) {
return;
}
lastScannedData.current = data;
lastScanTime.current = currentTime;
onBarCodeScanned(result);
},
[scanType, isCameraReady, onBarCodeScanned, debounceTime]
);
const handleZoomIn = useCallback(() => {
const newZoom = Math.min(1, zoom + 0.2);
setZoom(newZoom);
Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Light);
}, [zoom]);
const handleZoomOut = useCallback(() => {
const newZoom = Math.max(0, zoom - 0.2);
setZoom(newZoom);
Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Light);
}, [zoom]);
// ============ 动画插值 ============
const frameBorderWidthInterpolated = frameBorderWidth.interpolate({
inputRange: [2, 6],
outputRange: [2, 6],
});
// 测量相机视图的位置
const handleCameraViewLayout = useCallback((event: LayoutChangeEvent) => {
if (cameraViewRef.current) {
cameraViewRef.current.measureInWindow((x, y, width, height) => {
console.log('📹 相机视图位置:', { x, y, width, height });
setCameraViewLayout({ x, y, width, height });
});
}
}, []);
// ============ 渲染 ============
return (
<YStack flex={1} backgroundColor="black">
<YStack
ref={cameraViewRef}
flex={1}
position="relative"
{...panResponder.panHandlers}
onLayout={handleCameraViewLayout}
>
{/* 相机视图 */}
<CameraView
ref={cameraRef}
style={StyleSheet.absoluteFill}
facing={facing as CameraType}
zoom={zoom}
autofocus="on"
onCameraReady={handleCameraReady}
barcodeScannerSettings={{
barcodeTypes: [...SUPPORTED_BARCODE_TYPES],
}}
onBarcodeScanned={scanType === ScanType.BARCODE ? handleBarCodeScanned : undefined}
/>
{/* 顶部控制栏 */}
<CameraControls
scanType={scanType}
zoom={zoom}
onClose={onClose}
onToggleCamera={onToggleCamera}
onZoomIn={handleZoomIn}
onZoomOut={handleZoomOut}
setZoom={setZoom}
/>
{/* 扫描框 */}
<ScanFrame
scanType={scanType}
frameScale={frameScale}
frameBorderWidth={frameBorderWidthInterpolated}
onLayout={setScanFrameLayout}
/>
{/* 底部操作栏 */}
<CameraBottomBar
scanType={scanType}
onToggleScanType={onToggleScanType}
onTakePhoto={handleTakePhotoWithAnimation}
/>
</YStack>
</YStack>
);
}
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