iOS 在 Instagram 上的分享 : The file couldn’t be saved because the specified URL type isn’t supported

Question

我有以下代码可以在 swift 3 iOS 10.1 中在 Instagram 上分享图片:

func shareOnInstagram(_ photo: UIImage, text: String?) {
    let instagramUrl = URL(string: "instagram://app")!
    if UIApplication.shared.canOpenURL(instagramUrl) {
        let imageData = UIImageJPEGRepresentation(photo, 1.0)!
        let captionString = text ?? ""

        let writePath = URL(string: NSTemporaryDirectory())!.appendingPathComponent("instagram.igo")
        do {
            try imageData.write(to: writePath)
            let documentsInteractionsController = UIDocumentInteractionController(url: writePath)
            documentsInteractionsController.delegate = self
            documentsInteractionsController.uti = "com.instagram.exlusivegram"
            documentsInteractionsController.annotation = ["InstagramCaption": captionString]
            documentsInteractionsController.presentOpenInMenu(from: CGRect.zero, in: self.view, animated: true)
        }catch {
            return
        }
    }else {
        let alertController = UIAlertController(title: "Install Instagram", message: "You need Instagram app installed to use this feature. Do you want to install it now?", preferredStyle: .alert)
        let installAction = UIAlertAction(title: "Install", style: .default, handler: { (action) in
            //redirect to instagram
        })
        alertController.addAction(installAction)

        let laterAction = UIAlertAction(title: "Later", style: .cancel, handler: nil)
        alertController.addAction(laterAction)

        present(alertController, animated: true, completion: nil)
    }
}

在 try imageData.write(to: writePath) 这行，它抛出了如下错误:

Error Domain=NSCocoaErrorDomain Code=518 "The file couldn’t be saved because the specified URL type isn’t supported." UserInfo={NSURL=/private/var/mobile/Containers/Data/Application/5B80A983-5571-44A5-80D7-6A7B065800B5/tmp/instagram.igo}

有人可以帮我解决这个问题吗？

Answer 1

您正在错误地创建您的 URL。变化:

let writePath = URL(string: NSTemporaryDirectory())!.appendingPathComponent("instagram.igo")

到:

let writePath = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("instagram.igo")

无论何时从文件路径创建 URL，都必须使用 fileURLWithPath 初始值设定项。只有在创建以 http、mailto 等方案开头的 URL 时，使用 string 初始化程序才有效、tel 等 URL。