图像选择器返回NIL

Question

我崩溃时说我的任务为零，但警卫应该掩盖。

extension viewController: UIImagePickerControllerDelegate{

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]){
        imagePicker.dismiss(animated: true, completion: nil)
        guard let selectedImage = info[.originalImage] as? UIImage else {
            print("Image not found!")
            return
        }
        imageTaken.image = selectedImage <=== Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value
    }
}

在调试器中执行po命令，我得到以下值

(lldb) po selectedImage <UIImage:0x281f058c0 anonymous {3024, 4032}>

显然不是零，所以有点困惑。我想念什么？