iOS - worklet error , Android - undefined error

Hi guys i was heading some issue with iOS and Android both.

Android:

Frame Processor threw an error: undefined is not a function 

iOS:

Error: Javascript worklet error
    at _f (native)

Error: Exception in HostFunction: Javascript worklet error
...

i fixed it by directly using __scanCodes

here is example code that fully works for me

Solution

export const Scanner: React.FC = () => {
  const devices = useCameraDevices();
  const device = devices.back;

  const frameProcessor = useFrameProcessor(frame => {
    'worklet';
    const barcodes = __scanCodes(frame, [BarcodeFormat.ALL_FORMATS]);
  }, []);

  if (device == null) return <></>;
  return (
    <Camera
      style={{flex: 1}}
      device={device}
      isActive={true}
      frameProcessor={frameProcessor}
      frameProcessorFps={5}
    />
  );
};

i’m not sure that exactly why this works. But i will work around when i have some time

[tomekzaw]

Hey all, react-native-reanimated maintainer here.

Exception in HostFunction: Javascript worklet error is a generic error message that shows up when some worklet throws an error (like undefined is not a function here). Reanimated catches all errors from worklets and passes them to the console or LogBox.

While the error is caused by other third-party library, we are currently improving the developer experience by presenting the full error message instead of only “Javascript worklet error”. See the PR: https://github.com/software-mansion/react-native-reanimated/pull/3558

[geobako]

As per this issue for now you can do a patch so that you can build in Xcode 14

diff --git a/node_modules/react-native-vision-camera/ios/Frame Processor/FrameProcessorPlugin.h b/node_modules/react-native-vision-camera/ios/Frame Processor/FrameProcessorPlugin.h
index a2ccdcb..b9e0a56 100644
--- a/node_modules/react-native-vision-camera/ios/Frame Processor/FrameProcessorPlugin.h	
+++ b/node_modules/react-native-vision-camera/ios/Frame Processor/FrameProcessorPlugin.h	
@@ -53,7 +53,7 @@ objc_name : NSObject<FrameProcessorPluginBase>
 @end                                                                                \
 @implementation objc_name (FrameProcessorPlugin)                                    \
                                                                                     \
-__attribute__((constructor)) static void VISION_CONCAT(initialize_, objc_name)()    \
++(void)load    \
 {                                                                                   \
   [FrameProcessorPluginRegistry addFrameProcessorPlugin:@"__" @ #name callback:^id(Frame* frame, NSArray<id>* args) {    \
     return [objc_name callback:frame withArgs:args];                               \