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LabelResultListener

LabelResultListener is the protocol to handle callback when label recognition results are output.

@protocol LabelResultListener

Method	Description
`labelResultCallback`	If `ImageSource` is correctly configured, the callback is triggered each time when label recognition results are output.

labelResultCallback

- (void)labelResultCallback:(NSInteger)frameId imageData:(iImageData *_Nonnull)imageData results:(NSArray<iDLRResult*>* _Nullable)results;

Parameters

[in] frameId The ID of the frame.
[in] imageData The image data of frame.
[in] results Recognized label results of the frame.

Code Snippet

Objective-C
Swift

@interface ViewController ()<LabelResultListener>
@property (nonatomic, strong) DynamsoftLabelRecognizer *labelRecognizer;
@property (nonatomic, strong) DynamsoftCameraEnhancer *cameraEnhancer;
@property (nonatomic, strong) DCECameraView *dceView;
- (void)configureDLR {
   // Setup Dynamsoft Camera Enhancer
   self.dceView = [[DCECameraView alloc] initWithFrame:self.view.bounds];
   self.cameraEnhancer = [[DynamsoftCameraEnhancer alloc] initWithView:self.dceView];
   [self.view addSubview:self.dceView];
   // Initialize Dynamsoft Label Recognizer
   recognizer = [[DynamsoftLabelRecognizer alloc] init];
   // Trigger setImageSource
   [self.labelRecognizer setImageSource:self.cameraEnhancer];
   [self.labelRecognizer setLabelResultListener:self];
   [self.cameraEnhancer open];
   [self.labelRecognizer startScanning];
}
- (void)labelResultCallback:(NSInteger)frameId imageData:(iImageData *)imageData results:(NSArray<iDLRResult *> *)results {
   // Add your code to do with label recognition results
}

class ViewController: BaseViewController, LabelResultListener {
   var labelRecognizer: DynamsoftLabelRecognizer!
   var cameraEnhancer: DynamsoftCameraEnhancer!
   var dceView: DCECameraView!
   func configureDLR() -> Void {
      // Setup Dynamsoft Camera Enhancer
      dceView = DCECameraView.init(frame: self.view.bounds)
      cameraEnhancer = DynamsoftCameraEnhancer.init(view: self.dceView)
      self.view.addSubview(self.dceView)
      // Initialize Dynamsoft Label Recognizer
      let recognizer = DynamsoftLabelRecognizer()
      // Trigger setImageSource
      labelRecognizer.setImageSource(self.cameraEnhancer)
      labelRecognizer.setLabelResultListener(self)
      cameraEnhancer.open()
      labelRecognizer.startScanning()
   }
   func labelResultCallback(_ frameId: Int, imageData: iImageData, results: [iDLRResult]?) {
      // Add your code to do with label recognition results
   }
}