Btukfyl

I have an app that has a snapchat type camera where the UIView displays the back camera. I have a button on top and when I click that button I would like to take a picture. Right now when I click that button it simply opens up another camera.

This is the code for the button click:

@IBAction func takePhoto(_ sender: UIButton) {

    imagePicker =  UIImagePickerController()

    imagePicker.delegate = self

    imagePicker.sourceType = .camera

    present(imagePicker, animated: true, completion: nil)

}

However, as stated above, that is redundant since my ViewController displays a camera on ViewDidAppear.

override func viewDidAppear(_ animated: Bool) {

    self.ShowCamera(self.frontCamera)

    fullView.isHidden = false

}



func ShowCamera(_ front: Bool) {

    self.captureSession.sessionPreset = AVCaptureSession.Preset.photo



    if let availableDevices = AVCaptureDevice.DiscoverySession(deviceTypes: [ .builtInWideAngleCamera,.builtInMicrophone],

                                                                mediaType: AVMediaType.video, position: .back).devices.first {

        self.captureDevice = availableDevices

        if captureSession.isRunning != true {

            self.beginSession()

        }

    }



    if self.captureDevice == nil {

        print("capture device is nil")

        return

    }



    do {

        try self.captureSession.removeInput(AVCaptureDeviceInput(device: self.captureDevice!))

    } catch let error as NSError {

        print(error)

    }

}



func beginSession() {

    do {

        let captureDeviceInput = try AVCaptureDeviceInput(device: captureDevice)

        captureSession.addInput(captureDeviceInput)

    } catch {

        print(error.localizedDescription)

    }



    captureSession.startRunning()



    let preview = AVCaptureVideoPreviewLayer(session: captureSession)

    self.previewLayer = preview

    preview.videoGravity = AVLayerVideoGravity.resizeAspectFill

    CameraView.layer.insertSublayer(self.previewLayer, at: 0)

    self.previewLayer.frame = self.CameraView.layer.frame



    let dataOutput = AVCaptureVideoDataOutput()

    dataOutput.videoSettings = [(kCVPixelBufferPixelFormatTypeKey as NSString) : NSNumber(value: kCVPixelFormatType_32BGRA)] as [String : Any]

    dataOutput.alwaysDiscardsLateVideoFrames = true



    if captureSession.canAddOutput(dataOutput)

    {

        captureSession.addOutput(dataOutput)

    }



    captureSession.commitConfiguration()

}

All the code above simply gets the UIView and shows the camera. The button for TakePhoto is a sublayer that shows on top of the camera image. When I click that button I want to use whatever image is displaying on my camera.

The command to capture a photo from the running session is

guard let output = captureSession.outputs[0] as? AVCapturePhotoOutput 

else {return}

output.capturePhoto(with: settings, delegate: self)

Here, self, is a AVCapturePhotoCaptureDelegate. You then receive the photo thru the delegate messages and extract and save it.