Flutter simple_barcode_scanner Does Not Auto-Close After Scanning on iOS (Works on Android) - Stack Overflow

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I am using simple_barcode_scanner

On iOS, the barcode scanner does not close immediately after detecting a barcode. Instead, it only closes when the camera is moved away from the barcode. However, on Android, the scanner behaves correctly, closing as soon as a barcode is detected.

Expected Behavior: The scanner should automatically close as soon as a barcode is scanned, similar to Android behavior.

Actual Behavior: On Android: The scanner correctly detects a barcode and closes immediately. On iOS: The scanner remains open and only closes when the camera is moved away from the barcode.

Steps to Reproduce: Create a new Flutter project and add simple_barcode_scanner.

Implement the scanner using the following code:

scan() async {
    String? barcodeScanRes = await SimpleBarcodeScanner.scanBarcode(
      context,
      barcodeAppBar: const BarcodeAppBar(
        appBarTitle: 'Scan',
        centerTitle: false,
        enableBackButton: true,
        backButtonIcon: Icon(Icons.arrow_back_ios),
      ),
      isShowFlashIcon: true,
      delayMillis: 2000,
      cameraFace: CameraFace.back,
      lineColor: "#E81A5E",
    );
}

Run the app on both Android and iOS devices. Scan a barcode.

Observe the behavior: On Android: Scanner detects and closes immediately. On iOS: Scanner remains open until the camera moves away from the barcode.

Flutter version:

[√] Flutter Channel stable, 3.29.1

I am using simple_barcode_scanner

On iOS, the barcode scanner does not close immediately after detecting a barcode. Instead, it only closes when the camera is moved away from the barcode. However, on Android, the scanner behaves correctly, closing as soon as a barcode is detected.

Expected Behavior: The scanner should automatically close as soon as a barcode is scanned, similar to Android behavior.

Actual Behavior: On Android: The scanner correctly detects a barcode and closes immediately. On iOS: The scanner remains open and only closes when the camera is moved away from the barcode.

Steps to Reproduce: Create a new Flutter project and add simple_barcode_scanner.

Implement the scanner using the following code:

scan() async {
    String? barcodeScanRes = await SimpleBarcodeScanner.scanBarcode(
      context,
      barcodeAppBar: const BarcodeAppBar(
        appBarTitle: 'Scan',
        centerTitle: false,
        enableBackButton: true,
        backButtonIcon: Icon(Icons.arrow_back_ios),
      ),
      isShowFlashIcon: true,
      delayMillis: 2000,
      cameraFace: CameraFace.back,
      lineColor: "#E81A5E",
    );
}

Run the app on both Android and iOS devices. Scan a barcode.

Observe the behavior: On Android: Scanner detects and closes immediately. On iOS: Scanner remains open until the camera moves away from the barcode.

Flutter version:

[√] Flutter Channel stable, 3.29.1

• android
• ios
• flutter

Share Improve this question Follow edited Mar 12 at 6:20 king mort asked Mar 12 at 5:14 king mortking mort 1,4731010 silver badges1212 bronze badges

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1 Answer 1

Sorted by: Reset to default 0

This is because the behavior of barcode scanners can vary between platforms due to differences in how camera and scanning APIs are implemented.

Try Below Solutions:

1. Implement a Workaround: As a temporary solution, you can programmatically close the scanner once a barcode is detected by modifying the package's source code or handling the state within your application.

2. Explore Alternative Packages: Consider using other barcode scanning packages that offer more consistent behavior across platforms. One such package is mobile_scanner, or similar to this.

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