Swift Firebase UIActivityViewController分享图片

Question

在使用UIActivityViewController共享从Firebase下载的图像时需要一些帮助。我的当前设置仅在呈现UIActivityViewController时显示“更多”选项。没有其他任何内容可用于股票期权。

let shareAction = UIAlertAction(title: "Share", style: UIAlertActionStyle.default, handler: {(alert: UIAlertAction!) in
        var items:[Any] = []

        let titlePost = self.feeds[sender.tag].downloadURL

        let ref = Storage.storage().reference(forURL: titlePost)
        ref.getData(maxSize: 2 * 1024 * 1024, completion: {(data, error) in
            if error != nil {
                print("image could not be downloaded")
            } else {
                if let imgData = data {
                    if let img = UIImage(data: imgData) {
                        self.image = img
                        items.append(img)
                        print("image downloaded")
                    }
                }
            }
        })


        let activityViewController = UIActivityViewController(activityItems: items, applicationActivities: nil)
        self.present(activityViewController, animated: true, completion: nil)

    })