J'essaie de mettre en œuvre une caméra personnalisée similaire à Snapchat. Je ne vois pas pourquoi mon image est toujours nulle pendant la séance. Peut-être une nouvelle paire d'yeux peut-être utile que j'ai travaillé sur ce pendant 2 jours maintenant ...AVCapturePhoto Pourquoi ma photo est toujours nulle?
Lorsque je tape sur le bouton prendre la photo (pour exécuter "livePhotoTapped"), l'application se bloque avec erreur: erreur fatale: de façon inattendue trouvé nulle en déballant une valeur facultative, se référant à l'image étant nulle
Toute aide serait bien :)
@IBOutlet weak var cameraView: UIView!
//session to capture data
var captureSession = AVCaptureSession()
//which camera to use
var backFacingCamera: AVCaptureDevice?
var frontFacingCamera: AVCaptureDevice?
var currentDevice: AVCaptureDevice?
var stillImageOutput: AVCaptureStillImageOutput?
var stillImage: UIImage?
//camera preview layer
var cameraPreviewLayer: AVCaptureVideoPreviewLayer?
func setupCaptureSessionCamera() {
//this makes sure to get full res of camera
captureSession.sessionPreset = AVCaptureSession.Preset.photo
var devices = AVCaptureDevice.devices(for: .video)
//query available devices
for device in devices {
if device.position == .front {
frontFacingCamera = device
} else if device.position == .back {
backFacingCamera = device
}
}//end iteration
//set a default device
currentDevice = backFacingCamera
//configure session w output for capturing still img
stillImageOutput = AVCaptureStillImageOutput()
stillImageOutput?.outputSettings = [AVVideoCodecKey : AVVideoCodecType.jpeg]
do {
//capture the data from whichevr camera we r using..imagine as buffer to translate data into real world image
let captureDeviceInput = try AVCaptureDeviceInput(device: currentDevice!)
captureSession.addInput(captureDeviceInput)
captureSession.addOutput(stillImageOutput!)
//setup camera preview layer
cameraPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
//add the preview to our specified view in the UI
view.layer.addSublayer(cameraPreviewLayer!)
cameraPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
cameraPreviewLayer?.frame = cameraView.frame
captureSession.startRunning()
} catch let error {
print(error)
}//end do
}
@IBAction func livePhotoTapped(_ sender: UIButton) {
let videoConnection = stillImageOutput?.connection(with: .video)
//capture still image async
stillImageOutput?.captureStillImageAsynchronously(from: videoConnection!, completionHandler: { (imageDataBuffer, error) in
if let imageData = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: imageDataBuffer!, previewPhotoSampleBuffer: imageDataBuffer!) {
self.stillImage = UIImage(data: imageData)
self.performSegue(withIdentifier: "toPreviewPhoto", sender: self)
}
})
}
Votre 'imageDataBuffer' est vide? Ajoutez 'print (imageDataBuffer)' avant que 'si let imageData = ...' et voyez s'il est nul – 3stud1ant3
Où vous appelez 'setupCaptureSessionCamera'? –