Swift AVFoundation - swift

Question

This is actually two problems
they are marked with //*****************************
I put the entire class in this post,
the first is
//====================================
//====================================
#IBAction func btnMakeReport(_ sender: Any) {
let settings = AVCapturePhotoSettings()
//**************** self is erroring... getting...
// /Users/vyoumans/Documents/vyDEVELOPMENT/iOS/TESTS/camtest11/camtest11/VCCam02a.swift:104:61: Argument type 'VCCam02a' does not conform to expected type 'AVCapturePhotoCaptureDelegate'
photoOutput?.capturePhoto(with: settings, delegate: self)
Could I get some sugestions on why self would not confirm to AVCapturePhotoCaptureDelagate.
the second...
//************** image is error... but I define image above.
I declare image at the begining of the class. This error in //====================================
extension ViewController: AVCapturePhotoCaptureDelegate {
at bottom of app
Thanks
//-------- begining of code . ------------
'
import UIKit
import AVFoundation
//====================================
class VCCam02a: UIViewController {
var captureSession = AVCaptureSession()
var backCamera: AVCaptureDevice?
var frontCamera: AVCaptureDevice?
var currentCamrera: AVCaptureDevice?
var photoOutput: AVCapturePhotoOutput?
var cameraPreviewLayer: AVCaptureVideoPreviewLayer?
// var image: UIImage?
var image: UIImage?
override func viewDidLoad() {
super.viewDidLoad()
setupCaptureSession()
setupDevice()
setupInputOutput()
setupPreviewLayer()
startRunningCaptureSession()
}
//====================================
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//====================================
//====================================
func setupCaptureSession() {
captureSession.sessionPreset = AVCaptureSession.Preset.photo
}
//====================================
func setupDevice() {
let deviceDiscoverySession = AVCaptureDevice.DiscoverySession(deviceTypes: [AVCaptureDevice.DeviceType.builtInWideAngleCamera], mediaType: AVMediaType.video, position: AVCaptureDevice.Position.unspecified)
let devices = deviceDiscoverySession.devices
for device in devices {
if device.position == AVCaptureDevice.Position.back {
backCamera = device
} else if device.position == AVCaptureDevice.Position.front {
frontCamera = device
}
}
currentCamrera = backCamera
}
//====================================
func setupInputOutput() {
do {
let captureDeviceInput = try AVCaptureDeviceInput(device: currentCamrera!)
captureSession.addInput(captureDeviceInput)
photoOutput = AVCapturePhotoOutput()
photoOutput?.setPreparedPhotoSettingsArray([AVCapturePhotoSettings(format: [AVVideoCodecKey: AVVideoCodecType.jpeg])], completionHandler: nil)
captureSession.addOutput(photoOutput!)
} catch {
print(error)
}
}
//====================================
func setupPreviewLayer() {
cameraPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
cameraPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
cameraPreviewLayer?.connection?.videoOrientation = AVCaptureVideoOrientation.portrait
cameraPreviewLayer?.frame = self.view.frame
self.view.layer.insertSublayer(cameraPreviewLayer!, at: 0)
}
//====================================
func startRunningCaptureSession() {
captureSession.startRunning()
}
//====================================
//====================================
#IBAction func btnMakeReport(_ sender: Any) {
let settings = AVCapturePhotoSettings()
//**************** self is erroring... getting...
// /Users/vyoumans/Documents/vyDEVELOPMENT/iOS/TESTS/camtest11/camtest11/VCCam02a.swift:104:61: Argument type 'VCCam02a' does not conform to expected type 'AVCapturePhotoCaptureDelegate'
photoOutput?.capturePhoto(with: settings, delegate: self)
// performSegue(withIdentifier: "showPhoto_Segue", sender: nil)
}
//====================================
#IBAction func btnCancel(_ sender: UIButton) {
dismiss(animated: true, completion: nil)
}
//====================================
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "showPhoto_Segue" {
let VCPreviewViewController = segue.destination as! VCPreviewViewController
VCPreviewViewController.image = self.image
}
}
//====================================
//====================================
//====================================
//====================================
//====================================
//====================================
//====================================
//====================================
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
//====================================
extension ViewController: AVCapturePhotoCaptureDelegate {
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
if let imageData = photo.fileDataRepresentation() {
//************** image is error... but I define image above.
///Users/vyoumans/Documents/vyDEVELOPMENT/iOS/TESTS/camtest11/camtest11/VCCam02a.swift:143:13: Use of unresolved identifier 'image'
image = UIImage(data: imageData)
performSegue(withIdentifier: "showPhoto_Segue", sender: nil)
}
}
}
//====================================
//====================================
//====================================
//====================================
//====================================
'

Answer 1

Ok, this line:
photoOutput?.capturePhoto(with: settings, delegate: self)
Seems to be the problem. It sounds like you're getting a compiler error that self does not conform to the AVCapturePhotoCaptureDelegate protocol.
That's pretty self-explanatory. If your class conforms to the AVCapturePhotoCaptureDelegate protocol, you need to add that conformance to the class definition, or to an extension:
class VCCam02a: UIViewController, AVCapturePhotoCaptureDelegate
You will then need to implement all the methods in that protocol needed to handle the type of capture you are doing. To Quote the docs:
All methods in this protocol are optional at compile time, but at run
time your delegate object must respond to certain methods depending on
your photo settings:
(See the Apple docs on the protocol for more information.)