UIDocumentPickerViewController 用户选择了哪个云服务？

Question

我想 select 来自 Google 驱动器的文件和一个驱动器云服务，我正在使用 UIDocumentPickerViewController

例如：

func didPressOneDriveChoose() {
    let importMenu = UIDocumentPickerViewController(documentTypes: [(kUTTypePDF as String), (kUTTypeJPEG as String), (kUTTypePNG as String)], in: .import)
    importMenu.delegate = self
    importMenu.modalPresentationStyle = .formSheet
    self.show(importMenu, sender: nil)
}

收到委托方法的回调：

func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]){

    var arrFiles = [Dictionary<String, AnyObject>]()
    for url in urls {
        // returns local document directory URL
        // needs original GoogleDrive or OneDrive URL
    }
}

但我想知道有什么方法可以让用户 select 编辑哪个云服务，而且我想要原始 URL 指向那个 URL？目前，它 returns 本地文档目录 URL 在点击下载该文件后。

Answer 1

出于隐私原因，您将无法了解云服务（除非您从 URL... 坏主意开始推断）。但是，如果使用 open 模式而不是 import 模式 (in: .open)，则可以从文件的原始位置获取文件，而不是副本。警告，如果您使用 open 模式，您将开始就地打开文档，因此您需要适当地使用文件协调。

Answer 2

你这样初始化：

let importMenu = UIDocumentPickerViewController(documentTypes: [(kUTTypePDF as String), (kUTTypeJPEG as String), (kUTTypePNG as String)], in: .import)

如果您 read the documentation 在这个特定的选择器模式下 .import 它指出：

The URLs refer to a copy of the selected documents. These documents are temporary files. They remain available only until your application terminates. To keep a permanent copy, move these files to a permanent location inside your sandbox.

.open 似乎更适合您的用例。

The URLs refer to the selected documents. The provided URLs are security-scoped, referring to files outside your app’s sandbox. For more about working with external, security-scoped URLs, see Requirements.

但是鉴于您只是观察 url 来识别服务，而不是实际尝试手动访问这些文档，因此您不必担心会违反任何要求。所以把UIDocumentPickerViewController初始化改成：

let importMenu = UIDocumentPickerViewController(documentTypes: [(kUTTypePDF as String), (kUTTypeJPEG as String), (kUTTypePNG as String)], in: .open)

它应该有效！

UIDocumentPickerViewController 用户选择了哪个云服务？

UIDocumentPickerViewController which cloud service is selected by user?

google-drive-api

swift

swift4

uidocumentpickerviewcontroller