使用UIActivityViewController和UIActivityItemProvider共享PDF

使用UIActivityViewController和UIActivityItemProvider共享PDF

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在Swift 3中使用UIActivityViewController共享PDF

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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 ”

经过几天的忙碌，我发现了我认为最合适的方法：

1）PDF必须首先保存在文件系统中。 例如，可以在加载UIWebView之后完成：

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，然后共享。 此方法在Swift 3.0.1中对我有效：

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")  }         }