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Modified handleImagePicker with correct error handling. Able to scan QR code from images and give alert for non QR images

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Isky
2024-06-17 21:07:59 +08:00
parent 42c938b105
commit ad197abe6e
1 changed files with 33 additions and 21 deletions
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54
screens/QRScannerScreen.tsx
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@@ -149,30 +149,42 @@ const QRScannerScreen: React.FC<QRScannerScreenProps> = ({ clearScanData }) => {
handleQRCodeScanned({ type: 'TEST', data: 'TEST123' }); handleQRCodeScanned({ type: 'TEST', data: 'TEST123' });
}; };
// Function to handle QR code scanning from the image picker
const handleImagePicker = async () => {
const result = await ImagePicker.launchImageLibraryAsync({
mediaTypes: ImagePicker.MediaTypeOptions.Images,
allowsEditing: false, // Disabling the crop functionality
quality: 1,
});
if (result && result.assets[0].uri) {
try { //https://medium.com/@funti009/create-a-mobile-qr-scanner-that-scans-via-camera-and-image-in-the-gallery-react-native-expo-ee7098a265d7
const scannedResults = await scanFromURLAsync(result.assets[0].uri); // Refactored to use Camera.scanFromURLAsync instead
if (scannedResults.length > 0) { // Function to handle QR code scanning from the image picker
const dataNeeded = scannedResults[0].data;
handleQRCodeScanned({ type: 'QR_CODE', data: dataNeeded });
} else { const handleImagePicker = async () => {
setScannedData("No QR Code Found"); clearScanDataInternal();
setTimeout(() => setScannedData(""), 4000); const result = await ImagePicker.launchImageLibraryAsync({
} mediaTypes: ImagePicker.MediaTypeOptions.Images,
} catch (error) { allowsEditing: false, // Disabling the crop functionality
console.error('Error scanning QR code from image:', error); quality: 1,
Alert.alert('Failed to scan QR code from image.'); });
//if (result && result.assets[0].uri) { // KIV this....
if (result && result.assets && result.assets.length > 0 && result.assets[0].uri) { // this is to unsure the uri is not empty
try {
const scannedResult = await scanFromURLAsync(result.assets[0].uri);
if (!scannedResult.data) { // This will check if no QR was scanned
// Not sure why by passing the scannedResults.data is not working , only works when I use scannedResults[0].data..... KIV >.<
const dataNeeded = scannedResult[0].data;
handleQRCodeScanned({ type: 'QR_CODE', data: dataNeeded });
} else {
setScannedData("No QR Code Found");
setTimeout(() => setScannedData(""), 4000);
} }
} catch (error) {
console.error('Error scanning QR code from image:', error);
Alert.alert('Failed to scan QR code from image.');
} }
}; }
};
// For Splash, for some reason need to be near the end of the function... // For Splash, for some reason need to be near the end of the function...
// or else permission for camera is not asked // or else permission for camera is not asked