如何在使用 swift3.0 的按钮操作时在 ios 移动设备中打开文档文件，例如（.pdf、.doc、.docx）？

Question

我需要打开 UIDocumentPickerViewController 并且它应该允许用户 select 所有类型的文件。 ie.(.pdf,.doc)files 我使用了 UIDocumentPickerViewController 方法。我的代码：

UIDocumentPickerDelegate, UIDocumentMenuDelegate 在我的 class 声明中

//上传文件

func OpenFile(){

    let importMenu = UIDocumentMenuViewController(documentTypes: [String(kUTTypePNG),String(kUTTypeImage)], in: .import)
    importMenu.delegate = self
    importMenu.modalPresentationStyle = .fullScreen
    self.present(importMenu, animated: true, completion: nil)

}
@available(iOS 8.0, *)
public func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {        
    let cico = url as URL
    print("The Url is : \(cico)")

    do {
        let weatherData = try NSData(contentsOf: cico, options: NSData.ReadingOptions())
        print(weatherData)
        let activityItems = [weatherData]
        let activityController = UIActivityViewController(activityItems: activityItems, applicationActivities: nil)
        if UI_USER_INTERFACE_IDIOM() == .phone {
            self.present(activityController, animated: true, completion: { _ in })
        }
        else {
            let popup = UIPopoverController(contentViewController: activityController)
            popup.present(from: CGRect(x: CGFloat(self.view.frame.size.width / 2), y: CGFloat(self.view.frame.size.height / 4), width: CGFloat(0), height: CGFloat(0)), in: self.view, permittedArrowDirections: .any, animated: true)
        }

    } catch {
        print(error)
    }

    //optional, case PDF -> render
    //displayPDFweb.loadRequest(NSURLRequest(url: cico) as URLRequest)      


}

@available(iOS 8.0, *)
public func documentMenu(_ documentMenu:     UIDocumentMenuViewController, didPickDocumentPicker documentPicker: UIDocumentPickerViewController) {

    documentPicker.delegate = self
    present(documentPicker, animated: true, completion: nil)        
} 


func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {

    print(" cancelled by user")

    dismiss(animated: true, completion: nil)        

}

在此代码中，应用程序将崩溃。原因是 Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'You cannot initialize a UIDocumentPickerViewController except by the initWithDocumentTypes:inMode: and initWithURL:inMode: initializers.

我不知道如何初始化 initWithDocumentTypes:inMode. 我是新手 iOS 谁能帮帮我？？？你能帮帮我吗..

Answer 1

Swift 3*, 4*,

要打开文档和 select 任何文档，您正在使用 UIDocumentPickerViewController 那么如果 Google 驱动器已连接到用户设备。然后需要在您的应用程序中下载 selected 文档，然后您可以在 WKWebView、

中显示它

   @IBAction func uploadNewResumeAction(_ sender: Any) {

  /*  let documentPicker = UIDocumentPickerViewController(documentTypes: ["com.apple.iwork.pages.pages", "com.apple.iwork.numbers.numbers", "com.apple.iwork.keynote.key","public.image", "com.apple.application", "public.item","public.data", "public.content", "public.audiovisual-content", "public.movie", "public.audiovisual-content", "public.video", "public.audio", "public.text", "public.data", "public.zip-archive", "com.pkware.zip-archive", "public.composite-content", "public.text"], in: .import) */

    let documentPicker = UIDocumentPickerViewController(documentTypes: ["public.text", "com.apple.iwork.pages.pages", "public.data"], in: .import)

    documentPicker.delegate = self
    present(documentPicker, animated: true, completion: nil)
}

   extension YourViewController: UIDocumentPickerDelegate{


      func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {

                let cico = url as URL
                print(cico)
                print(url)

                print(url.lastPathComponent)

                print(url.pathExtension)

               }
   }

注意：如果您打算 select 所有文件，您必须使用以下代码：

  let documentPicker = UIDocumentPickerViewController(documentTypes: ["com.apple.iwork.pages.pages", "com.apple.iwork.numbers.numbers", "com.apple.iwork.keynote.key","public.image", "com.apple.application", "public.item","public.data", "public.content", "public.audiovisual-content", "public.movie", "public.audiovisual-content", "public.video", "public.audio", "public.text", "public.data", "public.zip-archive", "com.pkware.zip-archive", "public.composite-content", "public.text"], in: .import)

在你的操作方法中。

Answer 2

Actually, instead of WebView you could also use the QuickLook Framework, which is designed for this specific purpose. You just pass the location of the file and conform to the protocols. It will present a view controller with the document inside.

支持以下文件:

- iWork 文档（Pages、Numbers 和 Keynote）

- Microsoft Office 文档（只要它们是使用 Office 97 或任何其他更新版本创建的）

- PDF 文件

- 图片

- 文本文件

- RTF 格式文档

- 逗号分隔值文件 (csv)

Here 是 APPCODA 的教程，描述相同。

和

Here是Apple OBJ-C版提供的教程

Answer 3

要使用 Swift 中的 UIDocumentPickerViewController 打开 (.pdf, .doc, .docx) 的特定文档文件：文档类型将是

进口import MobileCoreServices

["com.microsoft.word.doc","org.openxmlformats.wordprocessingml.document", kUTTypePDF as String]

示例：

let importMenu = UIDocumentPickerViewController(documentTypes: ["com.microsoft.word.doc","org.openxmlformats.wordprocessingml.document", kUTTypePDF as String], in: UIDocumentPickerMode.import) 
importMenu.delegate = self 
self.present(importMenu, animated: true, completion: nil)

如何在使用 swift3.0 的按钮操作时在 ios 移动设备中打开文档文件，例如（.pdf、.doc、.docx）？

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