在swift中实现文档选择器(iOS)

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).点击上传按钮,我希望我的应用程序打开一个目录并选择文件(DocumentsPicker)

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

这样做的方法是什么Swift？

Answer 1

从项目的功能,启用iCloud和Key-Sharing.

MobileCoreServices在你的类中导入,最后在你的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)
    }

怎么称呼这一切？将以下位代码添加到您的单击功能中..

func clickFunction(){

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

单击您的按钮.将弹出以下菜单..

在DropBox的情况下.点击任何项目.您将被重定向回您的应用程序,URL将记录在您的终端中.

根据您的需要操作documentTypes.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,如果您想要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") })

好好享受.

Answer 2

您可以使用UIDocumentPickerViewController从文件应用程序或iCloud Drive获取文件.

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

2. 在要打开文档选择器的视图控制器上导入以下框架:

   import MobileCoreServices
   

3. 从以下方面实施以下方法UIDocumentPickerDelegate:

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

4. 创建一个UIDocumentPickerViewController以显示文件选择器或iCloud驱动器:

   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)
   

   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,则必须添加更多UTTypes types NSArray.要查看所有可用类型,您可以查看UTType文档

当文档选择器在iOS 11上打开并且您尝试在Google云端硬盘中选择一个文件时,由于存在错误,该文件可能会被禁用:http://www.openradar.me/24187873

Answer 3

该UIDocumentMenuViewController自iOS11已被弃用。从模态视图控制器显示时，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)
    }
}

与往常一样，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 为以下任意项或其组合：

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)
}