Ios 使用UIActivityViewController和UIActivityItemProvider共享PDF

我需要在iOS下共享/打开一些不同的文件，例如iCloud的图像或iBooks的pdf。这里有几个文本和图像的例子，但没有其他的例子

我创建了自己的

UIActivityItemProvider

；简化版本如下：

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
  }
}

并开始与以下内容共享：

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)

我期待一个共享对话框，如：

但我得到的只是：

---

有什么建议吗？

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];

**

在Swift 3中与UIActivityViewController共享PDF **

我花了很多时间思考如何在UIWebView中共享从URL加载的PDF文件，如“”

几天后，我找到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，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) 
       } 
}

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") 
            } 
        } 

2）读取保存的文件，然后共享。此方法在Swift 3.0.1中适用：

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) 
       } 
}

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") 
            } 
        } 

---

您必须在UIActivityViewController中传递支持pdf的应用程序选项的pdf文件url

func btnTapped() {
    if let pdf = Bundle.main.url(forResource: "yourPdfFileName", withExtension: "pdf", subdirectory: nil, localization: nil)  {
        self.sharePdf(path: pdf)
    }
}    

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)
    }
}

---

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

数据

表示

---

假设您正在使用

PDFKit

在UI中显示PDF。这意味着您将处理具有

dataRepresentation（）

方法的

PDFKit.PDFDocument

类。此方法返回可传递给

UIActivityViewController

初始化器的

Data

。

文档说明，提供NSData（并且只有NSData）将触发调用

dataTypeIdentifierForActivityType

——但事实并非如此。此外，NSURL将触发该事件。提供NSURL而不是NSData将显示至少大多数已安装的应用程序，但“保存到iBooks”除外。getDirectoryPath（）此函数在哪里？我得到一个错误hi@DhavalUmraliya，函数是这样的：func getDirectoryPath（）->String{let path=NSSearchPathForDirectoriesInDomains（.documentDirectory，.userDomainMask，true）let documentsDirectory=path[0]返回documentsDirectory}我仅使用

UIActivityViewController（activityItems:[documentoPath！]

而不是

UIActivityViewController（activityItems:[documento！]