An example of using the new AVPhotoCaptureOutput class in iOS 10

AVPhotoCaptureSample.swift

// Add the following to the Info.plist
// <key>NSCameraUsageDescription</key>
// <string>Allow our app to take photos</string>

AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo, completionHandler: {[weak self] status in
	if status {
		let session = AVCaptureSession()
		for device in AVCaptureDevice.devices() {
			if let device = device as? AVCaptureDevice, device.position == AVCaptureDevicePosition.back {
				self.device = device
			}
		}
		let videoInput = try AVCaptureDeviceInput(device: output.device)
		session.addInput(videoInput)

		let imageOutput = AVCapturePhotoOutput()
		session.addInput(imageInput)

		if let videoLayer = AVCaptureVideoPreviewLayer(session: session) {
		videoLayer.frame = previewViewContainer.bounds
		videoLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
		self?.previewView.layer.addSublayer(videoLayer)
	} else {
		let alert = UIAlertController(title: "Access Requested", message: "We need access to your camera", preferredStyle: .alert)
		alert.addAction(UIAlertAction(title: "Settings", style: .default, handler: { (action) -> Void in
			if let url = URL(string:UIApplicationOpenSettingsURLString) {
				UIApplication.shared.openURL(url)
			}
		}))
		alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
		self?.present(alert, animated: true, completion: nil)
	}
}


if let imageOutput = self?.output?.imageOutput as? AVCapturePhotoOutput {
	let types = imageOutput.availablePhotoCodecTypes
	if let this = self, types.contains("jpeg") {
		let settings = AVCapturePhotoSettings(format: [AVVideoCodecKey: "jpeg"])
		imageOutput.capturePhoto(with: settings, delegate: this)
	}
}

// Protocol conformance
@available(iOS 10.0, *)
extension UIViewController: AVCapturePhotoCaptureDelegate {
	func capture(_ captureOutput: AVCapturePhotoOutput, didFinishProcessingPhotoSampleBuffer photoSampleBuffer: CMSampleBuffer?, previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings: AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) {
		if let error = error {
			print(error.localizedDescription)
		}
		if let sampleBuffer = photoSampleBuffer, let imageData = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: sampleBuffer, previewPhotoSampleBuffer: previewPhotoSampleBuffer), let image = UIImage(data: imageData) {
			print("size: \(image.size)")
		}
	}
}