当使用swift3.0进行按钮操作时，如何在ios mobile中打开文档文件，例如（.pdf，.doc，.docx）？ [英] How to open the Document files e.g(.pdf,.doc,.docx) in ios mobile when a button action using swift3.0?

问题描述

我需要打开 UIDocumentPickerViewController ，它应该允许用户选择所有类型的文件。 ie。（。pdf，.doc）文件我用 UIDocumentPickerViewController 方法。
我的代码：

I need to open UIDocumentPickerViewController and It should allow user to select all type of files. ie.(.pdf,.doc)files I used UIDocumentPickerViewController method. my Code:

我的班级声明中的UIDocumentPickerDelegate，UIDocumentMenuDelegate

//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会崩溃。原因是由于未捕获的异常'NSInvalidArgumentException'而终止应用程序，原因：'除了initWithDocumentTypes之外，你无法初始化UIDocumentPickerViewController：inMode：和initWithURL：inMode：initializers。

In this code the app will crash. the reason is 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iOS的新手，任何人帮助我？ ??
你可以帮帮我..

I don't know how to initialise the initWithDocumentTypes:inMode. I'm new to iOS any one help me??? can you please help me..

推荐答案

Swift 3 *，4 *，

Swift 3*, 4*,

要打开文档并选择任何文档，您使用 UIDocumentPickerViewController 然后将显示iCloud，Files和Google Drive中显示的所有文档Google云端硬盘已在用户设备中连接。然后选择的文档需要在您的应用程序中下载，然后您可以在 WKWebView 中显示它，

To open document and select any document, you are using UIDocumentPickerViewController then all documents presented in your iCloud, Files and in Google Drive will be shown if Google Drive is connected in user device. Then selected document need to download in your app and from there you can show it in WKWebView,

   @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：如果您打算选择所有文件，则必须使用以下代码：

Note: If you intend to select all files the you have to use following code:

  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) 

在你的行动方法中。

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