// `type` in this method can be face, barcode, text or rectangle
// `padding` is the inside margin of the cropped image. default is .zero
// `type`：裁剪类型（人脸、条形码/二维码、文本、方框）
// `paddind`：裁剪出来的图片的内边距（可以使裁剪图片更完整些），默认 .zero
let image = UIImage(named: "image name")
// let image = UIImage(named: "image name")?.cgImage
image?.detector.crop(type: .face, padding: UIEdgeInsets(top: 40, left: 40, bottom: 40, right: 40)) { [weak self] result in
    switch result {
        case .success(let cropImageResults): // cropImageResults: [(image: T, frame: CGRect)]
            // When the `Vision` successfully find type of object you set and successfuly crops it.
            print("Found")
        case .notFound(let image, let frame):// image: original image （原图）
            // When the image doesn't contain any type of object you did set, `result` will be `.notFound`.
            print("Not Found")
        case .failure(let image, let frame, let error): // image: original image （原图）
            // When the any error occured, `result` will be `failure`.
            print(error.localizedDescription)
        }
}