Swift 3写真を撮るだけでなく動画を撮影するようにユーザーを制限する方法 - iOS、Xcode

Question

動画を選択すると写真アプリがクラッシュします。ユーザーは写真を選択でき、正常に動作しますが、動画を撮影するオプションを削除したいと思います。ビデオを無効にするにはどうすればいいですか？ choosePhoto FUNCコードの関連チャンクは以下の通りです...

@IBAction（_差出人：UIButton）{

let alertController = UIAlertController(title: "Title", message: "Message", preferredStyle: .actionSheet) 
    imagePicker = UIImagePickerController() 
    imagePicker.delegate = self 

    if (UIImagePickerController.isSourceTypeAvailable(.camera)) { 
     let cameraAction = UIAlertAction(title: "Use Camera", style: .default) { (action) in 

      let status = AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo) 

      if (status == .authorized) { 
       self.displayPicker(type: .camera) 
      } 

      if (status == .restricted) { 

       self.handleRestricted() 
      } 

      if (status == .denied) { 

       self.handleDenied() 
      } 

      if (status == .notDetermined) { 

       AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo, completionHandler: { (granted) in 
        if (granted) { 
         self.displayPicker(type: .camera) 
        } 

       }) 
      } 

     } 

    alertController.addAction(cameraAction) 
    } 

    if (UIImagePickerController.isSourceTypeAvailable(.photoLibrary)) { 
     let photoLibraryAction = UIAlertAction(title: "Use Photo Library", style: .default) { (action) in 

      let status = PHPhotoLibrary.authorizationStatus() 

      if (status == .authorized) { 
       self.displayPicker(type: .photoLibrary) 
      } 

      if (status == .restricted) { 

       self.handleRestricted() 
      } 

      if (status == .denied) { 

       self.handleDenied() 
      } 

      if (status == .notDetermined) { 

       PHPhotoLibrary.requestAuthorization({ (status) in 
        if (status == PHAuthorizationStatus.authorized) { 
         self.displayPicker(type: .photoLibrary) 
         } 
        }) 

       } 


      } 

     alertController.addAction(photoLibraryAction) 
    } 

    let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil) 

    alertController.addAction(cancelAction) 

    present(alertController, animated: true, completion: nil) 
} 

func handleDenied() { 

    let alertController = UIAlertController(title: "Camera Access Denied", message: "This app does not have acces to your device's camera. Please update your settings.", preferredStyle: .alert) 

    let settingsAction = UIAlertAction(title: "Go To Settings", style: .default) { (action) in 
     DispatchQueue.main.async { 
      UIApplication.shared.open(NSURL(string: UIApplicationOpenSettingsURLString)! as URL) 
     } 
    } 

    let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil) 

    alertController.popoverPresentationController?.sourceView = self.photoImage 
    alertController.popoverPresentationController?.sourceRect = self.photoImage.bounds 

    alertController.addAction(settingsAction) 
    alertController.addAction(cancelAction) 
    present(alertController, animated: true, completion: nil) 
} 

func handleRestricted() { 

    let alertController = UIAlertController(title: "Camera Access Denied", message: "This device is restricted from accessing the camera at this time", preferredStyle: .alert) 

    let defaultAction = UIAlertAction(title: "OK", style: .default, handler: nil) 

    alertController.popoverPresentationController?.sourceView = self.photoImage 
    alertController.popoverPresentationController?.sourceRect = self.photoImage.bounds 

    alertController.addAction(defaultAction) 
    present(alertController, animated: true, completion: nil) 

} 

func displayPicker(type: UIImagePickerControllerSourceType) { 
    self.imagePicker.mediaTypes = UIImagePickerController.availableMediaTypes(for: type)! 
    self.imagePicker.sourceType = type 
    self.imagePicker.allowsEditing = true 

    DispatchQueue.main.async { 
     self.present(self.imagePicker, animated: true, completion: nil) 
    } 
} 

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
    let chosenImage = info[UIImagePickerControllerEditedImage] as! UIImage 
    photoImage.contentMode = .scaleAspectFill 
    photoImage.image = chosenImage 
    dismiss(animated: true, completion: nil) 
} 

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) { 
    dismiss(animated: true, completion: nil) 
} 

Answer 1

何がやりたいことは、あなたがimagePickerは、次のプロパティ

imagePicker.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType: UIImagePickerControllerSourceTypeCamera]; 

を設定initをした後で

https://developer.apple.com/documentation/uikit/uiimagepickercontroller/1619173-mediatypes

Answer 2

右imagePicker.delegate = self

0123の後にこの行を入れて

imagePicker.mediaTypes = [kUTTypeImage as String] 

ファイルの先頭にimport MobileCoreServicesを追加することを忘れないでください。