毎回調べている気がするので。

Info.plistにPrivacy - Camera Usage Description追加。

必要なプロパティ。

var captureSession = AVCaptureSession()
var previewView = UIView()
var previewLayer:AVCaptureVideoPreviewLayer?

var videoOutput = AVCaptureVideoDataOutput() // VideoDataの場合
var photoOutput = AVCapturePhotoOutput()// PhotoDataの場合

設定。

動画の場合は、AVCaptureVideoDataOutputSampleBufferDelegateを、写真の場合はAVCapturePhotoCaptureDelegateを使用クラスに設定します。

class ViewController: UIViewController,AVCaptureVideoDataOutputSampleBufferDelegate,AVCapturePhotoCaptureDelegate {

previewView.frame = view.bounds
view.addSubview(previewView)

captureSession.beginConfiguration()

let device = AVCaptureDevice.default(for: AVMediaType.video)
let deviceInput = try! AVCaptureDeviceInput(device: device!)

captureSession.addInput(deviceInput)

//## 動画の場合
videoOutput = AVCaptureVideoDataOutput()
let queue = DispatchQueue(label: "VideoQueue")
videoOutput.setSampleBufferDelegate(self, queue: queue)
captureSession.addOutput(videoOutput)
if let videoConnection = videoOutput.connection(with: .video) {
    if videoConnection.isVideoOrientationSupported {
        videoConnection.videoOrientation = .portrait
    }
}
//##

//** 写真の場合 
photoOutput = AVCapturePhotoOutput()
captureSession.addOutput(photoOutput)
//**

captureSession.commitConfiguration()

previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
previewLayer?.frame = previewView.bounds
previewLayer?.connection?.videoOrientation = AVCaptureVideoOrientation.portrait
previewView.layer.addSublayer(previewLayer!)
DispatchQueue.global(qos: .userInitiated).async {
    self.captureSession.startRunning()
}

撮影。

VideoDataの場合、デリゲートメソッド内でフレームを取得。

func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
    let pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer)
}

Photoの場合、capturePhotoしてデリゲートメソッド内で処理。

self.photoOutput?.capturePhoto(with: AVCapturePhotoSettings(), delegate: self)

func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
    if let imageData = photo.fileDataRepresentation() {
        let uiImage = UIImage(data: imageData)
    }
}

お仕事のご相談こちらまで
rockyshikoku@gmail.com

Core MLを使ったアプリを作っています。
機械学習関連の情報を発信しています。

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