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我正在尝试使用 VisionKit 中的控制器 VNDocumentCameraViewController 扫描图片。是否可以通过例如隐藏扫描扫描按钮和顶部的闪光灯选项来自定义控制器？我只想开始扫描并在识别出图像时收到通知，而无需用户进行任何交互