如何将带有子视图的UIImageView保存到相机胶卷中？

// 将带有子视图的UIImageView保存到相机胶卷中
func saveImageViewToCameraRoll(imageView: UIImageView) {
    // 创建图形上下文
    UIGraphicsBeginImageContextWithOptions(imageView.bounds.size, false, 0.0)
    
    // 将UIImageView及其子视图绘制到图形上下文中
    imageView.drawHierarchy(in: imageView.bounds, afterScreenUpdates: true)
    
    // 从图形上下文中获取UIImage对象
    let image = UIGraphicsGetImageFromCurrentImageContext()
    
    // 结束图形上下文
    UIGraphicsEndImageContext()
    
    // 保存UIImage对象到相机胶卷中
    PHPhotoLibrary.shared().performChanges({
        let request = PHAssetCreationRequest.forAsset()
        request.addResource(with: .photo, data: image?.jpegData(compressionQuality: 1.0), options: nil)
    }, completionHandler: { success, error in
        if success {
            print("保存成功")
        } else {
            print("保存失败：\(error?.localizedDescription ?? "")")
        }
    })
}