Swift 使用UIDocumentPickerViewController选择Google文档

我正在使用UIDocumentPickerViewController构建一个文件选择器，我只想选择以下文件类型（其他文件类型需要禁用）

• 医生
• docx
• pdf
• gdoc（谷歌文档文件格式）
• 文本
• rtf

到目前为止，我掌握的代码如下：

import UIKit
import MobileCoreServices

class DocumentPickerVC: UIViewController {

@IBAction func btnLocalTapped(sender: UIButton) {

    let types: [String] = [kUTTypeText as String, kUTTypePDF as String, "com.microsoft.word.doc", "org.openxmlformats.wordprocessingml.document"]
    let documentPicker = UIDocumentPickerViewController(documentTypes: types, in: .import)
    documentPicker.delegate = self
    documentPicker.modalPresentationStyle = .formSheet
    documentPicker.allowsMultipleSelection = true
    self.present(documentPicker, animated: true, completion: nil)
}

}

extension DocumentPickerVC: UIDocumentPickerDelegate {

func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
    // you get from the urls parameter the urls from the files selected
    for url in urls {
        print(url)
    }
}

}

我似乎不知道谷歌文档的UTCoreType是什么

我查了一下这里的名单，但没找到

作为第二次尝试查找UTCoreType，我尝试了以下方法：

通过如下更改类型，为选择器解锁所有文件

let types=[kUTTypeItem作为字符串]

使用选择器下载文件并将其移动到documents目录

启用iTunes文件共享并复制到我的桌面

对该文件运行“mdls”工具

命令：

$mdls doc2.gdoc

输出：

kMDItemContentCreationDate         = 2018-10-15 23:07:02 +0000
kMDItemContentCreationDate_Ranking = 2018-10-15 00:00:00 +0000
kMDItemContentModificationDate     = 2018-10-15 23:07:05 +0000
kMDItemContentType                 = "dyn.ah62d4rv4ge80s3dtqq"
kMDItemContentTypeTree             = (
    "dyn.ah62d4rv4ge80s3dtqq",
    "public.data",
    "public.item"
)
kMDItemDateAdded                   = 2018-10-15 23:07:12 +0000
kMDItemDateAdded_Ranking           = 2018-10-15 00:00:00 +0000
kMDItemDisplayName                 = "doc2.gdoc"
kMDItemFSContentChangeDate         = 2018-10-15 23:07:05 +0000
kMDItemFSCreationDate              = 2018-10-15 23:07:02 +0000
kMDItemFSCreatorCode               = ""
kMDItemFSFinderFlags               = 0
kMDItemFSHasCustomIcon             = (null)
kMDItemFSInvisible                 = 0
kMDItemFSIsExtensionHidden         = 0
kMDItemFSIsStationery              = (null)
kMDItemFSLabel                     = 0
kMDItemFSName                      = "doc2.gdoc"
kMDItemFSNodeCount                 = (null)
kMDItemFSOwnerGroupID              = 20
kMDItemFSOwnerUserID               = 501
kMDItemFSSize                      = 16848
kMDItemFSTypeCode                  = ""
kMDItemInterestingDate_Ranking     = 2018-10-15 00:00:00 +0000
kMDItemKind                        = "Document"
kMDItemLogicalSize                 = 16848
kMDItemPhysicalSize                = 20480

尝试了文件的kMDItemContentType，但不起作用

---

现在我没有主意了。有什么想法吗？

我认为谷歌的文件类型没有UTI。最好是在应用程序中声明一个新的UTI作为导入的UTI。