当使用 swift3.0 执行按钮操作时，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 并且它应该允许用户选择所有类型的文件.ie.(.pdf,.doc) 文件我使用了 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:

UIDocumentPickerDelegate, UIDocumentMenuDelegate 在我的类声明中

//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 由于未捕获的异常NSInvalidArgumentException"而终止应用程序，原因:除了 initWithDocumentTypes:inMode: 和 initWithURL:inMode: 初始化程序，您无法初始化 UIDocumentPickerViewController.

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 新手，有人帮我吗???你能帮帮我吗..

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，您正在使用 UIDocumentPickerViewController 然后如果用户设备中连接了 Google Drive，则将显示您的 iCloud、文件和 Google Drive 中的所有文档.然后需要在您的应用程序中下载选定的文档，然后您可以在WKWebView,

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，您必须使用以下代码:

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) 

在您的操作方法中.

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