Comment utiliser AVCapturePhotoOutput
J'ai travaillé sur l'utilisation d'un appareil photo personnalisé et je suis récemment passé à Xcode 8 beta avec Swift 3. J'avais à l'origine ceci:
var stillImageOutput: AVCaptureStillImageOutput?
Cependant, je reçois maintenant l'avertissement:
'AVCaptureStillImageOutput' est obsolète dans iOS 10.0: utilisez plutôt AVCapturePhotoOutput
Comme c'est assez récent, je n'ai pas vu beaucoup d'informations à ce sujet. Voici mon code actuel:
var captureSession: AVCaptureSession?
var stillImageOutput: AVCaptureStillImageOutput?
var previewLayer: AVCaptureVideoPreviewLayer?
func clickPicture() {
if let videoConnection = stillImageOutput?.connection(withMediaType: AVMediaTypeVideo) {
videoConnection.videoOrientation = .portrait
stillImageOutput?.captureStillImageAsynchronously(from: videoConnection, completionHandler: { (sampleBuffer, error) -> Void in
if sampleBuffer != nil {
let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer)
let dataProvider = CGDataProvider(data: imageData!)
let cgImageRef = CGImage(jpegDataProviderSource: dataProvider!, decode: nil, shouldInterpolate: true, intent: .defaultIntent)
let image = UIImage(cgImage: cgImageRef!, scale: 1, orientation: .right)
}
})
}
}
J'ai essayé de regarder AVCapturePhotoCaptureDelegate, mais je ne sais pas trop comment l'utiliser. Est-ce que quelqu'un sait comment utiliser cela? Merci.
Mis à jour en Swift 4 Bonjour, il est très facile à utiliser AVCapturePhotoOutput.
Vous avez besoin de AVCapturePhotoCaptureDelegate qui renvoie CMSampleBuffer.
Vous pouvez également obtenir une image d’aperçu si vous communiquez à AVCapturePhotoSettings le previewFormat.
class CameraCaptureOutput: NSObject, AVCapturePhotoCaptureDelegate {
let cameraOutput = AVCapturePhotoOutput()
func capturePhoto() {
let settings = AVCapturePhotoSettings()
let previewPixelType = settings.availablePreviewPhotoPixelFormatTypes.first!
let previewFormat = [kCVPixelBufferPixelFormatTypeKey as String: previewPixelType,
kCVPixelBufferWidthKey as String: 160,
kCVPixelBufferHeightKey as String: 160]
settings.previewPhotoFormat = previewFormat
self.cameraOutput.capturePhoto(with: settings, delegate: self)
}
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photoSampleBuffer: CMSampleBuffer?, previewPhoto previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings: AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) {
if let error = error {
print(error.localizedDescription)
}
if let sampleBuffer = photoSampleBuffer, let previewBuffer = previewPhotoSampleBuffer, let dataImage = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: sampleBuffer, previewPhotoSampleBuffer: previewBuffer) {
print(image: UIImage(data: dataImage).size) // Your Image
}
}
}
Pour plus d'informations, visitez https://developer.Apple.com/reference/AVFoundation/AVCapturePhotoOutput
Remarque: vous devez ajouter la AVCapturePhotoOutput à la AVCaptureSession avant de prendre la photo. Donc, quelque chose comme: session.addOutput(output), puis: output.capturePhoto(with:settings, delegate:self) Merci @BigHeadCreations
Il y a ma mise en œuvre complète
import UIKit
import AVFoundation
class ViewController: UIViewController, AVCapturePhotoCaptureDelegate {
var captureSesssion : AVCaptureSession!
var cameraOutput : AVCapturePhotoOutput!
var previewLayer : AVCaptureVideoPreviewLayer!
@IBOutlet weak var capturedImage: UIImageView!
@IBOutlet weak var previewView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
captureSesssion = AVCaptureSession()
captureSesssion.sessionPreset = AVCaptureSessionPresetPhoto
cameraOutput = AVCapturePhotoOutput()
let device = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)
if let input = try? AVCaptureDeviceInput(device: device) {
if (captureSesssion.canAddInput(input)) {
captureSesssion.addInput(input)
if (captureSesssion.canAddOutput(cameraOutput)) {
captureSesssion.addOutput(cameraOutput)
previewLayer = AVCaptureVideoPreviewLayer(session: captureSesssion)
previewLayer.frame = previewView.bounds
previewView.layer.addSublayer(previewLayer)
captureSesssion.startRunning()
}
} else {
print("issue here : captureSesssion.canAddInput")
}
} else {
print("some problem here")
}
}
// Take picture button
@IBAction func didPressTakePhoto(_ sender: UIButton) {
let settings = AVCapturePhotoSettings()
let previewPixelType = settings.availablePreviewPhotoPixelFormatTypes.first!
let previewFormat = [
kCVPixelBufferPixelFormatTypeKey as String: previewPixelType,
kCVPixelBufferWidthKey as String: 160,
kCVPixelBufferHeightKey as String: 160
]
settings.previewPhotoFormat = previewFormat
cameraOutput.capturePhoto(with: settings, delegate: self)
}
// callBack from take picture
func capture(_ captureOutput: AVCapturePhotoOutput, didFinishProcessingPhotoSampleBuffer photoSampleBuffer: CMSampleBuffer?, previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings: AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) {
if let error = error {
print("error occure : \(error.localizedDescription)")
}
if let sampleBuffer = photoSampleBuffer,
let previewBuffer = previewPhotoSampleBuffer,
let dataImage = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: sampleBuffer, previewPhotoSampleBuffer: previewBuffer) {
print(UIImage(data: dataImage)?.size as Any)
let dataProvider = CGDataProvider(data: dataImage as CFData)
let cgImageRef: CGImage! = CGImage(jpegDataProviderSource: dataProvider!, decode: nil, shouldInterpolate: true, intent: .defaultIntent)
let image = UIImage(cgImage: cgImageRef, scale: 1.0, orientation: UIImageOrientation.right)
self.capturedImage.image = image
} else {
print("some error here")
}
}
// This method you can use somewhere you need to know camera permission state
func askPermission() {
print("here")
let cameraPermissionStatus = AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo)
switch cameraPermissionStatus {
case .authorized:
print("Already Authorized")
case .denied:
print("denied")
let alert = UIAlertController(title: "Sorry :(" , message: "But could you please grant permission for camera within device settings", preferredStyle: .alert)
let action = UIAlertAction(title: "Ok", style: .cancel, handler: nil)
alert.addAction(action)
present(alert, animated: true, completion: nil)
case .restricted:
print("restricted")
default:
AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo, completionHandler: {
[weak self]
(granted :Bool) -> Void in
if granted == true {
// User granted
print("User granted")
DispatchQueue.main.async(){
//Do smth that you need in main thread
}
}
else {
// User Rejected
print("User Rejected")
DispatchQueue.main.async(){
let alert = UIAlertController(title: "WHY?" , message: "Camera it is the main feature of our application", preferredStyle: .alert)
let action = UIAlertAction(title: "Ok", style: .cancel, handler: nil)
alert.addAction(action)
self?.present(alert, animated: true, completion: nil)
}
}
});
}
}
}
PhotoOutput (_ output: AVCapturePhotoOutput, didFinishProcessingPhotoBuffer: CMSampleBuffer ?, previewPhotoBuffer.
Utilisez la méthode suivante:
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
let imageData = photo.fileDataRepresentation()
if let data = imageData, let img = UIImage(data: data) {
print(img)
}
}
La fonction de délégué capture a été remplacée par photoOutput. Voici la fonction mise à jour pour Swift 4.
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photoSampleBuffer: CMSampleBuffer?, previewPhoto previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings: AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) {
if let error = error {
print(error.localizedDescription)
}
if let sampleBuffer = photoSampleBuffer, let previewBuffer = previewPhotoSampleBuffer, let dataImage = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: sampleBuffer, previewPhotoSampleBuffer: previewBuffer) {
print("image: \(String(describing: UIImage(data: dataImage)?.size))") // Your Image
}
}
J'ai trouvé ce projet dans GitHub qui m'a aidé à comprendre l'initialisation de l'appareil et la session de capture.
J'ai pris l'excellente réponse de @Aleksey Timoshchenko et l'ai mise à jour avec Swift 4.x.
Notez que pour mon cas d'utilisation, j'autorise l'utilisateur à prendre plusieurs photos. C'est pourquoi je les enregistre dans le tableau images.
Notez que vous devez câbler la méthode @IBAction takePhoto via votre storyboard ou en code. Dans mon cas, j'utilise un storyboard.
À partir de iOS 11, le AVCapturePhotoOutput.jpegPhotoDataRepresentation utilisé dans @Aleksey Timoshchenko answer est obsolète.
Swift 4.x
class CameraVC: UIViewController {
@IBOutlet weak var cameraView: UIView!
var images = [UIImage]()
var captureSession: AVCaptureSession!
var cameraOutput: AVCapturePhotoOutput!
var previewLayer: AVCaptureVideoPreviewLayer!
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
startCamera()
}
func startCamera() {
captureSession = AVCaptureSession()
captureSession.sessionPreset = AVCaptureSession.Preset.photo
cameraOutput = AVCapturePhotoOutput()
if let device = AVCaptureDevice.default(for: .video),
let input = try? AVCaptureDeviceInput(device: device) {
if (captureSession.canAddInput(input)) {
captureSession.addInput(input)
if (captureSession.canAddOutput(cameraOutput)) {
captureSession.addOutput(cameraOutput)
previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
previewLayer.frame = cameraView.bounds
cameraView.layer.addSublayer(previewLayer)
captureSession.startRunning()
}
} else {
print("issue here : captureSesssion.canAddInput")
}
} else {
print("some problem here")
}
}
@IBAction func takePhoto(_ sender: UITapGestureRecognizer) {
let settings = AVCapturePhotoSettings()
let previewPixelType = settings.availablePreviewPhotoPixelFormatTypes.first!
let previewFormat = [
kCVPixelBufferPixelFormatTypeKey as String: previewPixelType,
kCVPixelBufferWidthKey as String: 160,
kCVPixelBufferHeightKey as String: 160
]
settings.previewPhotoFormat = previewFormat
cameraOutput.capturePhoto(with: settings, delegate: self)
}
}
extension CameraVC : AVCapturePhotoCaptureDelegate {
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
if let error = error {
print("error occured : \(error.localizedDescription)")
}
if let dataImage = photo.fileDataRepresentation() {
print(UIImage(data: dataImage)?.size as Any)
let dataProvider = CGDataProvider(data: dataImage as CFData)
let cgImageRef: CGImage! = CGImage(jpegDataProviderSource: dataProvider!, decode: nil, shouldInterpolate: true, intent: .defaultIntent)
let image = UIImage(cgImage: cgImageRef, scale: 1.0, orientation: UIImage.Orientation.right)
/**
save image in array / do whatever you want to do with the image here
*/
self.images.append(image)
} else {
print("some error here")
}
}
}