[iOS] Picking a video

iOSVideoPicking.swift

//https://www.raywenderlich.com/94404/play-record-merge-videos-ios-swift
// MARK: - UIImagePickerControllerDelegate
extension PlayVideoViewController: UIImagePickerControllerDelegate {
  func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
    let mediaType = info[UIImagePickerControllerMediaType] as! NSString
   
    dismissViewControllerAnimated(true) {
      if mediaType == kUTTypeMovie {
        let videoURL = info[UIImagePickerControllerMediaURL] as! NSURL
        //TODO call method that decompresses the video and send it to the metal
      }
    }
  }
}
 
// MARK: - UINavigationControllerDelegate
extension PlayVideoViewController: UINavigationControllerDelegate {
}

func startMediaBrowserFromViewController(viewController: UIViewController, usingDelegate delegate: protocol<UINavigationControllerDelegate, UIImagePickerControllerDelegate>) -> Bool {
  if UIImagePickerController.isSourceTypeAvailable(.SavedPhotosAlbum) == false {
    return false
  }
 
  var mediaUI = UIImagePickerController()
  mediaUI.sourceType = .SavedPhotosAlbum
  mediaUI.mediaTypes = [kUTTypeMovie as NSString as String]
  mediaUI.allowsEditing = true
  mediaUI.delegate = delegate
 
  presentViewController(mediaUI, animated: true, completion: nil)
  return true
}

//call to show it:
startMediaBrowserFromViewController(self, usingDelegate: self)