检索 UIActivityViewController 保存的图像路径

Question

用户可以使用UIActivityViewController sheet 将 UIImageView 上的图像保存到库中，也可以分享或发布到社交媒体，如下所示：

如果用户选择“保存图像”，UIActivityViewController 无法返回保存的图像路径。它只会默默地保存和关闭。

我如何检索保存它的路径？我将存储访问已保存图像的路径并将它们显示在另一个视图中。非常感谢您的帮助。

编辑：下面是当用户点击分享按钮时我呈现 UIActivityViewController 的方式。

let imageShare = [ self.imageView.image ]
let activityViewController = UIActivityViewController(activityItems: imageShare as [Any] , applicationActivities: nil)
activityViewController.popoverPresentationController?.sourceView = self.view
activityViewController.popoverPresentationController?.sourceRect = self.shareButton.frame

self.present(activityViewController, animated: true, completion: nil)

Answer 1

我认为问题是：既然你已经有了图像......为什么你想得到那个路径？

但是 - 您可以在 UIActivityViewController 完成中获得选定的“分享”活动：

func shareImage(_ img: UIImage) -> Void {
    
    let items = [img]
    let activityViewController = UIActivityViewController(activityItems: items, applicationActivities: nil)
    
    activityViewController.popoverPresentationController?.sourceView = self.view
    activityViewController.popoverPresentationController?.sourceRect = self.shareButton.frame

    activityViewController.completionWithItemsHandler = { (activityType: UIActivity.ActivityType?, completed:
                                        Bool, arrayReturnedItems: [Any]?, error: Error?) in
        if completed {
            if let act = activityType {
                switch act {
                case .saveToCameraRoll:
                    print("Save Image was selected")
                    // do something here
                    // such as getting the asset reference?
                    //  or getting the URL to the asset?
                
                case .copyToPasteboard:
                    print("Copy was selected")
                    
                default:
                    print("Something else...")
                }
            }
        } else {
            print("Cancel was selected")
        }
        if let shareError = error {
            print("error while sharing: \(shareError.localizedDescription)")
        }

    }
    
    present(activityViewController, animated: true)
    
}

因此，根据您的实际需求，您可以轻松找到示例代码，用于从相机胶卷（或其资产参考或 URL 等）中获取最近保存的图像。