fix: handle errors in onDetect; exclude armv7 for iOS

CHANGELOG.md

@@ -1,3 +1,12 @@
+## 6.0.1
+
+Bugs fixed:
+* Fixed a bug that would cause onDetect to not handle errors.
+
+Improvements:
+* [iOS] Excluded the `armv7` architecture, which is unsupported by MLKit 7.0.0.
+* Added a new `onDetectError` error handler to the `MobileScanner` widget, for use with `onDetect`.
+
 ## 6.0.0
 
 **BREAKING CHANGES:**

example/ios/Podfile

@@ -40,8 +40,8 @@ end
 post_install do |installer|
   installer.pods_project.targets.each do |target|
     flutter_additional_ios_build_settings(target)
-        target.build_configurations.each do |config|
-          config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '15.5.0'
-        end
+    target.build_configurations.each do |config|
+      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '15.5.0'
+    end
   end
 end

ios/mobile_scanner.podspec

@@ -4,7 +4,7 @@
 #
 Pod::Spec.new do |s|
   s.name             = 'mobile_scanner'
-  s.version          = '6.0.0'
+  s.version          = '6.0.1'
   s.summary          = 'An universal scanner for Flutter based on MLKit.'
   s.description      = <<-DESC
 An universal scanner for Flutter based on MLKit.
@@ -18,8 +18,12 @@ An universal scanner for Flutter based on MLKit.
   s.dependency 'GoogleMLKit/BarcodeScanning', '~> 7.0.0'
   s.platform = :ios, '15.5.0'
   s.static_framework = true
-  # Flutter.framework does not contain a i386 slice.
-  s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386' }
+  # Flutter.framework does not contain a i386 slice, and MLKit does not support armv7.
+  s.pod_target_xcconfig = {
+    'DEFINES_MODULE' => 'YES',
+    'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386 armv7',
+    'EXCLUDED_ARCHS[sdk=iphoneos*]' => 'armv7',
+  }
   s.swift_version = '5.0'
   s.resource_bundles = { 'mobile_scanner_privacy' => ['Resources/PrivacyInfo.xcprivacy'] }
 end

lib/src/mobile_scanner.dart

@@ -21,6 +21,7 @@ class MobileScanner extends StatefulWidget {
   const MobileScanner({
     this.controller,
     this.onDetect,
+    this.onDetectError = _onDetectErrorHandler,
     this.fit = BoxFit.cover,
     this.errorBuilder,
     this.overlayBuilder,
@@ -34,15 +35,17 @@ class MobileScanner extends StatefulWidget {
   final MobileScannerController? controller;
 
   /// The function that signals when new codes were detected by the [controller].
-  /// If null, use the controller.barcodes stream directly to capture barcodes.
-  ///
-  /// This method does not receive any [MobileScannerBarcodeException]s
-  /// that are emitted by the scanner.
   ///
   /// To handle both [BarcodeCapture]s and [MobileScannerBarcodeException]s,
-  /// use the [MobileScannerController.barcodes] stream directly.
+  /// use the [MobileScannerController.barcodes] stream directly (recommended),
+  /// or provide a function to [onDetectError].
   final void Function(BarcodeCapture barcodes)? onDetect;
 
+  /// The error handler equivalent for the [onDetect] function.
+  ///
+  /// If [onDetect] is not null, and this is null, errors are silently ignored.
+  final void Function(Object error, StackTrace stackTrace) onDetectError;
+
   /// The error builder for the camera preview.
   ///
   /// If this is null, a black [ColoredBox],
@@ -122,6 +125,11 @@ class MobileScanner extends StatefulWidget {
 
   @override
   State<MobileScanner> createState() => _MobileScannerState();
+
+  /// This empty function is used as the default error handler for [onDetect].
+  static void _onDetectErrorHandler(Object error, StackTrace stackTrace) {
+    // Do nothing.
+  }
 }
 
 class _MobileScannerState extends State<MobileScanner>
@@ -255,7 +263,11 @@ class _MobileScannerState extends State<MobileScanner>
   void initState() {
     if (widget.onDetect != null) {
       WidgetsBinding.instance.addObserver(this);
-      _subscription = controller.barcodes.listen(widget.onDetect);
+      _subscription = controller.barcodes.listen(
+        widget.onDetect,
+        onError: widget.onDetectError,
+        cancelOnError: false,
+      );
     }
     if (controller.autoStart) {
       controller.start();
@@ -297,7 +309,11 @@ class _MobileScannerState extends State<MobileScanner>
       case AppLifecycleState.paused:
         return;
       case AppLifecycleState.resumed:
-        _subscription = controller.barcodes.listen(widget.onDetect);
+        _subscription = controller.barcodes.listen(
+          widget.onDetect,
+          onError: widget.onDetectError,
+          cancelOnError: false,
+        );
 
         unawaited(controller.start());
       case AppLifecycleState.inactive:

macos/mobile_scanner.podspec

@@ -4,7 +4,7 @@
 #
 Pod::Spec.new do |s|
   s.name             = 'mobile_scanner'
-  s.version          = '6.0.0'
+  s.version          = '6.0.1'
   s.summary          = 'An universal scanner for Flutter based on MLKit.'
   s.description      = <<-DESC
 An universal scanner for Flutter based on MLKit.

pubspec.yaml

@@ -1,6 +1,6 @@
 name: mobile_scanner
 description: A universal barcode and QR code scanner for Flutter based on MLKit. Uses CameraX on Android, AVFoundation on iOS and Apple Vision & AVFoundation on macOS.
-version: 6.0.0
+version: 6.0.1
 repository: https://github.com/juliansteenbakker/mobile_scanner
 
 screenshots: