UIImagePickerController关闭崩溃

Question

我在Xcode 11.3中实现标准相机功能时遇到麻烦。当我单击“使用照片”按钮时，应用程序崩溃。单击“重新录制”按钮效果很好。

@IBAction func onPhotoButton(_ sender: Any) {

    let imagePickerController = UIImagePickerController()
    imagePickerController.delegate = self
    imagePickerController.sourceType = UIImagePickerController.SourceType.camera
    present(imagePickerController, animated: true, completion: nil)
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
{
    imagePickerController.dismiss(animated: true) // crashes on this line!
    imageView.image = info[.originalImage] as? UIImage
}

崩溃发生在.dismiss行上。错误是“致命错误：意外地发现了nil，同时隐式展开了一个可选值：“

我查看了以前关于类似问题的帖子，似乎没有一个可以解决这个问题。

Answer 1

在将违规行更改为]时有效>

 picker.dismiss(animated: true)