I'm following this tutorial creating a custom camera for my app. After capturing a picture, the user can continue to another view where the image is displayed. Unfortunately, sometimes the image is not displayed on the next page at all, and other times it works perfectly fine. It appears that my delegate function is not being called all the time:
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {...}
My Camera Model
class CameraModel: NSObject,ObservableObject,AVCapturePhotoCaptureDelegate{
@Published var isTaken = false
@Published var session = AVCaptureSession()
@Published var alert = false
// since were going to read pic data....
@Published var output = AVCapturePhotoOutput()
// preview....
@Published var preview : AVCaptureVideoPreviewLayer!
@Published var image = UIImage()
func Check(){
// first checking camerahas got permission...
switch AVCaptureDevice.authorizationStatus(for: .video) {
case .authorized:
setUp()
return
// Setting Up Session
case .notDetermined:
// retusting for permission....
AVCaptureDevice.requestAccess(for: .video) { (status) in
if status{
self.setUp()
}
}
case .denied:
self.alert.toggle()
return
default:
return
}
}
func setUp(){
// setting up camera...
do{
// setting configs...
self.session.beginConfiguration()
// change for your own...
let device = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .back)
let input = try AVCaptureDeviceInput(device: device!)
// checking and adding to session...
if self.session.canAddInput(input){
self.session.addInput(input)
}
// same for output....
if self.session.canAddOutput(self.output){
self.session.addOutput(self.output)
}
self.session.commitConfiguration()
}
catch{
print(error.localizedDescription)
}
}
// take and retake functions...
func takePic(){
self.output.capturePhoto(with: AVCapturePhotoSettings(), delegate: self)
DispatchQueue.global(qos: .background).async {
self.session.stopRunning()
DispatchQueue.main.async {
withAnimation{self.isTaken.toggle()}
}
}
}
func reTake(){
DispatchQueue.global(qos: .background).async {
self.session.startRunning()
DispatchQueue.main.async {
withAnimation{self.isTaken.toggle()}
}
}
}
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
print("reached")
if error != nil{
return
}
guard let imageData = photo.fileDataRepresentation() else{return}
guard let uiImage = UIImage(data: imageData) else {return}
self.image = uiImage
}
}
As you can imagine, "reached" is only sometimes printed, hence the reason why my next view only sometimes contains the UIImage. I'm not really sure what to do from here.
