在 swift (iOS) 中实现文档选择器

Question

我想在我的 iOS 应用程序中选择任何类型的文件（.pdf、.docs、.xlsx、.jpeg、.txt、.rtf 等）功能。点击上传按钮，我希望我的应用打开一个目录并选择文件(DocumentsPicker)

@IBAction pickDocument(sender: UIButton) {
    //Open Document Picker
}

Swift 中的任何方法？

Answer 1

iOS 14 更新：您不需要任何功能。只需创建一个具有适当类型的UIDocumentPickerViewController，实现委托，就完成了。

更多信息in this answer。来自那里的代码：

import UIKit
import MobileCoreServices
import UniformTypeIdentifiers

func selectFiles() {
    let types = UTType.types(tag: "json", 
                             tagClass: UTTagClass.filenameExtension, 
                             conformingTo: nil)
    let documentPickerController = UIDocumentPickerViewController(
            forOpeningContentTypes: types)
    documentPickerController.delegate = self
    self.present(documentPickerController, animated: true, completion: nil)
}

---

根据您项目的功能，启用iCloud 和Key-Sharing。

在您的类中导入MobileCoreServices，然后在您的UIViewController 中扩展以下三个类：

UIDocumentMenuDelegate,UIDocumentPickerDelegate,UINavigationControllerDelegate

实现以下功能：

public func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
    guard let myURL = urls.first else {
        return
    }
    print("import result : \(myURL)")
}
      

public func documentMenu(_ documentMenu:UIDocumentMenuViewController, didPickDocumentPicker documentPicker: UIDocumentPickerViewController) {
    documentPicker.delegate = self
    present(documentPicker, animated: true, completion: nil)
}


func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {
    print("view was cancelled")
    dismiss(animated: true, completion: nil)
}

你怎么称呼这一切？将以下代码添加到您的 click 函数中：

func clickFunction(){

let importMenu = UIDocumentMenuViewController(documentTypes: [String(kUTTypePDF)], in: .import)
    importMenu.delegate = self
    importMenu.modalPresentationStyle = .formSheet       
    self.present(importMenu, animated: true, completion: nil)
}

单击您的按钮。会弹出以下菜单..

对于 Dropbox。单击任何项​​目时。您将被重定向回您的应用，并且该 URL 将记录在您的终端中。

根据需要操作文档类型。在我的应用程序中，用户只允许使用 Pdf。所以，适合自己。

kUTTypePDF kUTTypePNG kUTTypeJPEG ...

此外，如果您想自定义自己的菜单栏。添加以下代码并在处理程序中自定义您自己的函数

importMenu.addOption(withTitle: "Create New Document", image: nil, order: .first, handler: { print("New Doc Requested") })

尽情享受吧。

Answer 2

您可以使用UIDocumentPickerViewController 从“文件”应用或 iCloud Drive 中获取文件。

1. 从iCloud 功能激活Key-value storage 和iCloud Documents：

1. 在要打开文档选择器的视图控制器上导入以下框架：

    import MobileCoreServices
   
    // For iOS 14+
    import UniformTypeIdentifiers
   

2. 从UIDocumentPickerDelegate实现以下方法：

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

3. 创建一个UIDocumentPickerViewController 以显示文件选择器或 iCloud Drive：

   // Use this code if your are developing prior iOS 14
   let types: [String] = [kUTTypePDF as String]
   let documentPicker = UIDocumentPickerViewController(documentTypes: types, in: .import)
   documentPicker.delegate = self
   documentPicker.modalPresentationStyle = .formSheet
   self.present(documentPicker, animated: true, completion: nil)
   
   // For iOS 14+
   let documentPicker = UIDocumentPickerViewController(forOpeningContentTypes: [UTType.item], asCopy: false)
   documentPicker.delegate = self
   documentPicker.modalPresentationStyle = .formSheet
   
   self.present(documentPicker, animated: true, completion: nil)
   

如果您希望用户可以将更多类型的文件导入您的应用程序，您必须将更多UTTypes 添加到types NSArray。要查看所有可用的类型，您可以查看UTType Docs

当文档选择器在 iOS 11 上打开并且您尝试在 Google Drive 中选择一个文件时，该文件可能由于错误而被禁用：http://www.openradar.me/24187873

Answer 3

UIDocumentMenuViewController 自 iOS11 起已弃用。当从模态视图控制器呈现时，我还发现它有问题。 这是使用选择器的直接方法：

import MobileCoreServices

private func attachDocument() {
    let types = [kUTTypePDF, kUTTypeText, kUTTypeRTF, kUTTypeSpreadsheet]
    let importMenu = UIDocumentPickerViewController(documentTypes: types as [String], in: .import)

    if #available(iOS 11.0, *) {
        importMenu.allowsMultipleSelection = true
    }

    importMenu.delegate = self
    importMenu.modalPresentationStyle = .formSheet

    present(importMenu, animated: true)
}

extension AViewController: UIDocumentPickerDelegate, UINavigationControllerDelegate {
    func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
        viewModel.attachDocuments(at: urls)
    }

     func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {
        controller.dismiss(animated: true, completion: nil)
    }
}

像往常一样不要忘记添加 iCloud 支持：

Answer 4

UIDocumentPickerViewController(documentTypes: [String], in: UIDocumentPickerMode) 在 iOS 14.0 中已弃用

现在是 UIDocumentPickerViewController(forOpeningContentTypes: [UTType])

ContentTypes 是和数组中的任何一种或以下的组合：

UTType.image, UTType.text, UTType.plainText, UTType.utf8PlainText,    UTType.utf16ExternalPlainText, UTType.utf16PlainText,    UTType.delimitedText, UTType.commaSeparatedText,    UTType.tabSeparatedText, UTType.utf8TabSeparatedText, UTType.rtf,    UTType.pdf, UTType.webArchive, UTType.image, UTType.jpeg,    UTType.tiff, UTType.gif, UTType.png, UTType.bmp, UTType.ico,    UTType.rawImage, UTType.svg, UTType.livePhoto, UTType.movie,    UTType.video, UTType.audio, UTType.quickTimeMovie, UTType.mpeg,    UTType.mpeg2Video, UTType.mpeg2TransportStream, UTType.mp3,    UTType.mpeg4Movie, UTType.mpeg4Audio, UTType.avi, UTType.aiff,    UTType.wav, UTType.midi, UTType.archive, UTType.gzip, UTType.bz2,    UTType.zip, UTType.appleArchive, UTType.spreadsheet, UTType.epub

这对我来说是这样的：

let supportedTypes = [myArrayFromAnyOfTheAbove]

func openDocument() {
    let documentPicker = UIDocumentPickerViewController(forOpeningContentTypes: supportedTypes, asCopy: true)
    documentPicker.delegate = self
    documentPicker.allowsMultipleSelection = false
    documentPicker.shouldShowFileExtensions = true
    present(documentPicker, animated: true, completion: nil)
}

Answer 5

let docsTypes = ["public.text",
                          "com.apple.iwork.pages.pages",
                          "public.data",
                          "kUTTypeItem",
                          "kUTTypeContent",
                          "kUTTypeCompositeContent",
                          "kUTTypeData",
                          "public.database",
                          "public.calendar-event",
                          "public.message",
                          "public.presentation",
                          "public.contact",
                          "public.archive",
                          "public.disk-image",
                          "public.plain-text",
                          "public.utf8-plain-text",
                          "public.utf16-external-plain-​text",
                          "public.utf16-plain-text",
                          "com.apple.traditional-mac-​plain-text",
                          "public.rtf",
                          "com.apple.ink.inktext",
                          "public.html",
                          "public.xml",
                          "public.source-code",
                          "public.c-source",
                          "public.objective-c-source",
                          "public.c-plus-plus-source",
                          "public.objective-c-plus-​plus-source",
                          "public.c-header",
                          "public.c-plus-plus-header",
                          "com.sun.java-source",
                          "public.script",
                          "public.assembly-source",
                          "com.apple.rez-source",
                          "public.mig-source",
                          "com.apple.symbol-export",
                          "com.netscape.javascript-​source",
                          "public.shell-script",
                          "public.csh-script",
                          "public.perl-script",
                          "public.python-script",
                          "public.ruby-script",
                          "public.php-script",
                          "com.sun.java-web-start",
                          "com.apple.applescript.text",
                          "com.apple.applescript.​script",
                          "public.object-code",
                          "com.apple.mach-o-binary",
                          "com.apple.pef-binary",
                          "com.microsoft.windows-​executable",
                          "com.microsoft.windows-​dynamic-link-library",
                          "com.sun.java-class",
                          "com.sun.java-archive",
                          "com.apple.quartz-​composer-composition",
                          "org.gnu.gnu-tar-archive",
                          "public.tar-archive",
                          "org.gnu.gnu-zip-archive",
                          "org.gnu.gnu-zip-tar-archive",
                          "com.apple.binhex-archive",
                          "com.apple.macbinary-​archive",
                          "public.url",
                          "public.file-url",
                          "public.url-name",
                          "public.vcard",
                          "public.image",
                          "public.fax",
                          "public.jpeg",
                          "public.jpeg-2000",
                          "public.tiff",
                          "public.camera-raw-image",
                          "com.apple.pict",
                          "com.apple.macpaint-image",
                          "public.png",
                          "public.xbitmap-image",
                          "com.apple.quicktime-image",
                          "com.apple.icns",
                          "com.apple.txn.text-​multimedia-data",
                          "public.audiovisual-​content",
                          "public.movie",
                          "public.video",
                          "com.apple.quicktime-movie",
                          "public.avi",
                          "public.mpeg",
                          "public.mpeg-4",
                          "public.3gpp",
                          "public.3gpp2",
                          "public.audio",
                          "public.mp3",
                          "public.mpeg-4-audio",
                          "com.apple.protected-​mpeg-4-audio",
                          "public.ulaw-audio",
                          "public.aifc-audio",
                          "public.aiff-audio",
                          "com.apple.coreaudio-​format",
                          "public.directory",
                          "public.folder",
                          "public.volume",
                          "com.apple.package",
                          "com.apple.bundle",
                          "public.executable",
                          "com.apple.application",
                          "com.apple.application-​bundle",
                          "com.apple.application-file",
                          "com.apple.deprecated-​application-file",
                          "com.apple.plugin",
                          "com.apple.metadata-​importer",
                          "com.apple.dashboard-​widget",
                          "public.cpio-archive",
                          "com.pkware.zip-archive",
                          "com.apple.webarchive",
                          "com.apple.framework",
                          "com.apple.rtfd",
                          "com.apple.flat-rtfd",
                          "com.apple.resolvable",
                          "public.symlink",
                          "com.apple.mount-point",
                          "com.apple.alias-record",
                          "com.apple.alias-file",
                          "public.font",
                          "public.truetype-font",
                          "com.adobe.postscript-font",
                          "com.apple.truetype-​datafork-suitcase-font",
                          "public.opentype-font",
                          "public.truetype-ttf-font",
                          "public.truetype-collection-​font",
                          "com.apple.font-suitcase",
                          "com.adobe.postscript-lwfn​-font",
                          "com.adobe.postscript-pfb-​font",
                          "com.adobe.postscript.pfa-​font",
                          "com.apple.colorsync-profile",
                          "public.filename-extension",
                          "public.mime-type",
                          "com.apple.ostype",
                          "com.apple.nspboard-type",
                          "com.adobe.pdf",
                          "com.adobe.postscript",
                          "com.adobe.encapsulated-​postscript",
                          "com.adobe.photoshop-​image",
                          "com.adobe.illustrator.ai-​image",
                          "com.compuserve.gif",
                          "com.microsoft.bmp",
                          "com.microsoft.ico",
                          "com.microsoft.word.doc",
                          "com.microsoft.excel.xls",
                          "com.microsoft.powerpoint.​ppt",
                          "com.microsoft.waveform-​audio",
                          "com.microsoft.advanced-​systems-format",
                          "com.microsoft.windows-​media-wm",
                          "com.microsoft.windows-​media-wmv",
                          "com.microsoft.windows-​media-wmp",
                          "com.microsoft.windows-​media-wma",
                          "com.microsoft.advanced-​stream-redirector",
                          "com.microsoft.windows-​media-wmx",
                          "com.microsoft.windows-​media-wvx",
                          "com.microsoft.windows-​media-wax",
                          "com.apple.keynote.key",
                          "com.apple.keynote.kth",
                          "com.truevision.tga-image",
                          "com.sgi.sgi-image",
                          "com.ilm.openexr-image",
                          "com.kodak.flashpix.image",
                          "com.j2.jfx-fax",
                          "com.js.efx-fax",
                          "com.digidesign.sd2-audio",
                          "com.real.realmedia",
                          "com.real.realaudio",
                          "com.real.smil",
                          "com.allume.stuffit-archive",
                          "org.openxmlformats.wordprocessingml.document",
                          "com.microsoft.powerpoint.​ppt",
                          "org.openxmlformats.presentationml.presentation",
                          "com.microsoft.excel.xls",
                          "org.openxmlformats.spreadsheetml.sheet",
                         
    
  ]
let documentPicker = UIDocumentPickerViewController(documentTypes: Utils.docsTypes, in: .import)
    documentPicker.delegate = self
    documentPicker.allowsMultipleSelection = true
    present(documentPicker, animated: true, completion: nil)

Answer 6

这将帮助您实现下载/上传功能

UIDocumentMenuViewController *importMenu = [[UIDocumentMenuViewController alloc] initWithDocumentTypes:@[@"public.item"] inMode:UIDocumentPickerModeImport | UIDocumentPickerModeExportToService];

更多信息请阅读Apple Documentation

Answer 7

iCloud 访问所有类型的文件#

func openiCloudDocuments(){
    let importMenu = UIDocumentPickerViewController(documentTypes: [String("public.data")], in: .import)
    importMenu.delegate = self
    importMenu.modalPresentationStyle = .formSheet
    self.present(importMenu, animated: true, completion: nil)
}

Answer 8

我纠结的是如何为 PickerView 指定一些特定的格式，例如 .pptx 和 .xlsx 文件。下面是一些创建 PickerView 的代码，其中包含一些常用的类型...

let types: [String] = [
    kUTTypeJPEG as String,
    kUTTypePNG as String,
    "com.microsoft.word.doc",
    "org.openxmlformats.wordprocessingml.document",
    kUTTypeRTF as String,
    "com.microsoft.powerpoint.​ppt",
    "org.openxmlformats.presentationml.presentation",
    kUTTypePlainText as String,
    "com.microsoft.excel.xls",
    "org.openxmlformats.spreadsheetml.sheet",
    kUTTypePDF as String,
    kUTTypeMP3 as String
]
let documentPicker = UIDocumentPickerViewController(documentTypes: types, in: .import)
documentPicker.delegate = self
documentPicker.modalPresentationStyle = .formSheet
self.present(documentPicker, animated: true, completion: nil)

我发现将这个列表放在一起有用的地方有两个：

https://developer.apple.com/library/archive/documentation/Miscellaneous/Reference/UTIRef/Articles/System-DeclaredUniformTypeIdentifiers.html

https://escapetech.eu/manuals/qdrop/uti.html

希望对某人有所帮助！

Answer 9

您可以使用NSURLSession 实现您描述的内容。

您必须将显示的目标目录限制为应用的文档目录。应用程序没有文件系统的完全访问权限。