在 swift (iOS) 中实施文档选择器

Question

我想在我的 iOS 应用程序中选择任何类型（.pdf、.docs、.xlsx、.jpeg、.txt、.rtf 等）功能的文件。单击上传按钮时，我希望我的应用程序打开一个目录和 select 个文件（DocumentsPicker）

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

在 Swift 中有任何方法可以做到这一点吗？

Answer 1

您可以使用 NSURLSession 来实现您描述的内容。

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

Answer 2

这将帮助您实现 download/upload 功能

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

阅读更多Apple Documentation

Answer 3

iOS14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，就大功告成了。

更多信息。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)
}

根据您项目的能力，同时启用 iCloud 和 Key-Sharing。

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

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点击功能中：

func clickFunction(){

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

点击您的按钮。会弹出如下菜单..

以 Dropbox 为例。单击任何项目。您将被重定向回您的应用，并且 URL 将登录到您的终端。

根据需要处理文档类型。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 ...

另外，如果您想定制自己的菜单栏。在 handler

中添加以下代码并自定义你自己的函数

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

尽情享受吧。

Answer 4

您可以使用 UIDocumentPickerViewController 从“文件”应用程序或 iCloud Drive 获取文件。

从 iCloud 功能中激活 Key-value storage 和 iCloud Documents：

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

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
 }

创建 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 UTType 添加到 types NSArray。要查看所有可用类型，您可以检查 UTType Docs

当文档选择器在 iOS 11 上打开并且您尝试 select Google 驱动器中的文件时，该文件可能由于错误而被禁用：http://www.openradar.me/24187873

Answer 5

自 iOS11 后，UIDocumentMenuViewController 已弃用。当从模态视图控制器呈现时，我也发现它有问题。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 6

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 7

我遇到的一个问题是如何为 PickerView 指定一些特定格式，例如 .pptx 和 .xlsx 文件。下面是一些代码，用于创建具有一些常用类型的 PickerView...

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)

我发现有两个地方对整理此列表很有用：

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 8

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 9

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

中被弃用
现在是 UIDocumentPickerViewController(forOpeningContentTypes: [UTType])

ContentTypes 是数组中的任何一个或以下的组合：

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) }

在 swift (iOS) 中实施文档选择器

Implement Document Picker in swift (iOS)

ios

swift

uidocumentpickervc

iCloud 访问所有类型的文件#