AVFoundation - viewDidLoad

av_foundation_view_did_load.swift

override func viewDidLoad() {
  super.viewDidLoad()
  
  let deviceTypes: [AVCaptureDeviceType] = [.builtInDuoCamera, .builtInTelephotoCamera, .builtInWideAngleCamera]
  let devices = AVCaptureDeviceDiscoverySession(deviceTypes: deviceTypes, mediaType: AVMediaTypeVideo, position: .back).devices
  
  if let device = devices?.first {
    self.captureDevice = device
    beginSession()
  }
}