LabelResultListener

You are viewing a history document page of Dynamsoft Label Recognizer iOS v2.2.20.

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

@protocol LabelResultListener

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

1. @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
   }
   

2. 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
      }
   }