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iOS8-day-by-day/13-coreimage-detectors/LiveDetection/LiveDetection/CoreImageVideoFilter.swift:53:5: 'dispatch_release' is unavailable

    @IBAction func capturePhoto(_ sender: Any) {
        
        // stop text recognition
        cameraSession.stopRunning()
        
        //start filter
        videoFilter = CoreImageVideoFilter(superview: view, applyFilterCallback: nil)
        // Simulate a tap on the mode selector to start the process

        if let videoFilter = videoFilter {
            videoFilter.stopFiltering()
            detector = prepareRectangleDetector()
            videoFilter.applyFilter = {
                image in
                self.resultCIIMage = self.performRectangleDetection(image)!
                return self.performRectangleDetection(image)
            }
            
            videoFilter.startFiltering(currentSession: cameraSession)
        }
        
        
        
        cameraSession.beginConfiguration()
        cameraSession.sessionPreset = AVCaptureSessionPresetPhoto
        let device : AVCaptureDevice = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)
        do {
            let captureDeviceInput = try AVCaptureDeviceInput(device: device)
            if cameraSession.canAddInput(captureDeviceInput) {
                cameraSession.addInput(captureDeviceInput)
            }
        }
        catch {
            print("Error occured \(error)")
            return
        }
        if(device.isFocusModeSupported(.continuousAutoFocus)) {
            try! device.lockForConfiguration()
            device.focusMode = .continuousAutoFocus
            device.unlockForConfiguration()
        }
        runStillImageCaptureAnimation()
        cameraSession.addOutput(cameraOutput)
        cameraSession.commitConfiguration()
        
        let photoSettings = AVCapturePhotoSettings()
        photoSettings.flashMode = .on
        photoSettings.isHighResolutionPhotoEnabled = true
        
        if photoSettings.__availablePreviewPhotoPixelFormatTypes.count > 0 {
            photoSettings.previewPhotoFormat = [ kCVPixelBufferPixelFormatTypeKey as String : photoSettings.__availablePreviewPhotoPixelFormatTypes.first!]
            
        }
        
        cameraSession.startRunning()
        print("go this")
        cameraOutput.isHighResolutionCaptureEnabled = true
        cameraOutput.capturePhoto(with: photoSettings, delegate: self)
        //  print("go that")
        //   cameraSession.stopRunning()
    }
    
    
    func runStillImageCaptureAnimation(){
        DispatchQueue.main.async {
            self.preview.layer.opacity = 0.0
            print("opacity 0")
            UIView.animate(withDuration: 1.0) {
                self.preview.layer.opacity = 1.0
                print("opacity 1")
            }
        }
    }
    
    func capture(_ captureOutput: AVCapturePhotoOutput, didFinishProcessingPhotoSampleBuffer photoSampleBuffer: CMSampleBuffer?, previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings: AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) {
        
        print("go threee ")
        
        if let error = error {
            print("error occure : \(error.localizedDescription)")
        }
        
        if  let sampleBuffer = photoSampleBuffer,
            let previewBuffer = previewPhotoSampleBuffer,
            let dataImage =  AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer:  sampleBuffer, previewPhotoSampleBuffer: previewBuffer) {
            
            let dataProvider = CGDataProvider(data: dataImage as CFData)
            let cgImageRef: CGImage! = CGImage(jpegDataProviderSource: dataProvider!, decode: nil, shouldInterpolate: true, intent: .defaultIntent)
            //let imageX = UIImage(cgImage: cgImageRef, scale: 1.0, orientation: UIImageOrientation.right)
            let image = UIImage(cgImage: cgImageRef, scale: 1.0, orientation: UIImageOrientation.right)
            
            capturedImage = videoFilter?.resuItImage == nil ? image : convert(cmage: resultCIIMage)
            user?.setScannedlist(list: self.scannerdText)
            user?.capImage(captured :  capturedImage!  )
            tesseract?.delegate = nil
            tesseract = nil
            
            
            self.dismiss(animated: false, completion: { Void in self.cameraSession.stopRunning()})
            
        } else {
            print("some errorX  here")
        }
    }