使用UIActivityViewController和UIActivityItemProvider共享PDF

Question

我需要在iOS下分享/打开一些不同的文件，例如图像到iCloud或pdf到iBooks。文本和图像有几个例子，但在其他方面没什么......

我创建了自己的UIActivityItemProvider;简化版本：

class MyItemProvider: UIActivityItemProvider {

  override func item() -> AnyObject {
    self.placeholderItem
  }

  override func activityViewController(activityViewController: UIActivityViewController, dataTypeIdentifierForActivityType activityType: String?) -> String {
    return kUTTypePDF as String
  }

  func activityViewControllerPlaceholderItem(activityViewController: UIActivityViewController) -> AnyObject {
    return self.placeholderItem
  }
}

并开始分享：

let myPDF = NSData(contentsOfURL: NSBundle.mainBundle().URLForResource("testpdf", withExtension: "pdf")) {
let activityVC = UIActivityViewController(activityItems: [MyItemProvider(placeHolder: myPDF)], applicationActivities: nil)
self.presentViewController(activityVC, animated: true, completion: nil)

我期待像：

这样的分享

但我得到的只是：

有什么建议吗？

Answer 1

**

与Swift 3中的UIActivityViewController共享PDF

**

我花了很多时间思考如何在从URL加载的UIWebView中共享PDF文件，例如“http://youPdfFile.pdf”

经过几天的努力，我发现了我认为最合适的方式：

1）首先必须将PDF保存在文件系统中。例如，这可以在加载UIWebView后完成：

class yourViewController: UIViewController{
       var documentPathToLoad = "http://youPdfFile.pdf"
       ...

       func webViewDidFinishLoad(_ webView: UIWebView) { 
           if yourWebView.isLoading { 
               // still loading 
               return 
           } 

           //Save the pdf document to file system 
           savePdf() 
       }

       func savePdf(){    
           let fileManager = FileManager.default 
           let paths = (NSSearchPathForDirectoriesInDomain((.documentDirectory, .userDomainMask, true)[0] as NSString).appendingPathComponent("documento.pdf") 
           let pdfDoc = NSData(contentsOf:URL(string: documentPathToLoad)!) 
           fileManager.createFile(atPath: paths as String, contents: pdfDoc as Data?, attributes: nil) 
       } 
}

2）读取保存的文件，然后分享。这个方法适用于Swift 3.0.1：

func loadPDFAndShare(){ 

           let fileManager = FileManager.default 
           let documentoPath = (self.getDirectoryPath() as NSString).appendingPathComponent("documento.pdf") 

           if fileManager.fileExists(atPath: documentoPath){              
                let documento = NSData(contentsOfFile: documentoPath) 
                let activityViewController: UIActivityViewController = UIActivityViewController(activityItems: [documento!], applicationActivities: nil) 
                activityViewController.popoverPresentationController?.sourceView=self.view 
                present(activityViewController, animated: true, completion: nil) 
            } 
            else { 
                print("document was not found") 
            } 
        } 

Answer 2

此代码适用于我共享文件。当然，文件必须已经创建：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.pdf", @"FileName"]];
NSURL *URL = [NSURL fileURLWithPath:fullPath];
NSArray *activityItems = [NSArray arrayWithObjects:URL, nil];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];

[self presentViewController:activityViewController animated:YES completion:nil];

Answer 3

您必须在UIActivityViewController中传递 pdf文件网址以获取pdf支持的应用程序选项。

func sharePdf(path:URL) {

    let fileManager = FileManager.default

    if fileManager.fileExists(atPath: path.path) {
        let activityViewController: UIActivityViewController = UIActivityViewController(activityItems: [path], applicationActivities: nil)
        activityViewController.popoverPresentationController?.sourceView = self.view
        self.present(activityViewController, animated: true, completion: nil)
    } else {
        print("document was not found")
        let alertController = UIAlertController(title: "Error", message: "Document was not found!", preferredStyle: .alert)
        let defaultAction = UIAlertAction.init(title: "ok", style: UIAlertAction.Style.default, handler: nil)
        alertController.addAction(defaultAction)
        UIViewController.hk_currentViewController()?.present(alertController, animated: true, completion: nil)
    }
}

Answer 4

现有的答案演示了如何使用本地文件的URL共享PDF。但是，如果不想，则不必创建文件。另一种方法是使用Data表示您的PDF文件。

假设您使用PDFKit在UI中显示PDF。这意味着您将处理具有PDFKit.PDFDocument方法的dataRepresentation()类。此方法返回Data，可以将其传递给UIActivityViewController初始化程序。