与 UIActivityViewController 共享 PDF - 文件名

Posted 2023-02-23

【中文标题】与 UIActivityViewController 共享 PDF - 文件名

【英文标题】：Sharing PDF with UIActivityViewController - File Name

【发布时间】：2019-12-30 16:41:26

【问题描述】：

我正在创建一个 PDF 并通过 UIActivityViewController 共享它。

func createFlyer() -> Data 
  // 1
  let pdfMetaData = [
    kCGPDFContextCreator: "Flyer",
  ]
  let format = UIGraphicsPDFRendererFormat() 
  format.documentInfo = pdfMetaData as [String: Any]

  // 2
  let pageWidth = 8.5 * 72.0
  let pageHeight = 11 * 72.0
  let pageRect = CGRect(x: 0, y: 0, width: pageWidth, height: pageHeight)

  // 3
  let renderer = UIGraphicsPDFRenderer(bounds: pageRect, format: format)
  // 4
  let data = renderer.pdfData  (context) in
    // 5
    context.beginPage()
    // 6
    let attributes = [
      NSAttributedString.Key.font: UIFont.boldSystemFont(ofSize: 72)
    ]
    let text = "I'm a PDF!"
    text.draw(at: CGPoint(x: 0, y: 0), withAttributes: attributes)
  

  return data


func sharePDF () 
    let activityViewController = UIActivityViewController(
        activityItems: [data],  applicationActivities: nil)
    activityViewController.excludedActivityTypes = [UIActivity.ActivityType.saveToCameraRoll]

    if let popoverPresentationController = activityViewController.popoverPresentationController 
        popoverPresentationController.barButtonItem = self.sharePDFButton
    
    self.present(activityViewController, animated: true, completion: 
    )   

一切都很好，除了文件名是系统生成的（'PDF Document.pdf'）。

有没有办法自定义文件名？

【问题讨论】：

尚未对此进行测试，可能有更好的方法来完成此操作，但您可以尝试先将文件保存到临时文件夹。像这样：***.com/a/52467491/12555191

不是最方便的方法，但似乎可行。

【参考方案1】：

在展示activityViewController时请尝试使用下面的代码，我希望它有效。

let fileManager = FileManager.default
let documentoPath = getDirectoryPath().appendingPathComponent(url.lastPathComponent) as URL
print("documentoPath :\(documentoPath)")
if  fileManager.fileExists(atPath: documentoPath.path) 
     DispatchQueue.main.async 
        let activityViewController: UIActivityViewController = UIActivityViewController(activityItems: [documentoPath], applicationActivities: nil)
                            activityViewController.popoverPresentationController?.sourceView = self.view
                           self.downloadNavController?.present(activityViewController, animated: true, completion:  () in
      UIBarButtonItem.appearance().tintColor = UIColor.systemBlue
      UINavigationBar.appearance().barTintColor = UIColor.white
          )
       
 

您可以在这里找到 getDirectoryPath()：

func getDirectoryPath() -> URL 
    var nestedFolderURL: URL?
    do
        let rootFolderURL = try FileManager.default.url(
            for: .documentDirectory,
            in: .userDomainMask,
            appropriateFor: nil,
            create: false
        )
        nestedFolderURL = rootFolderURL
        
        if !FileManager.default.fileExists(atPath: nestedFolderURL!.relativePath) 
            try FileManager.default.createDirectory(
                at: nestedFolderURL!,
                withIntermediateDirectories: false,
                attributes: nil
            )
        
        return nestedFolderURL!
     catch (let error) 
        print(error)
    
    
    return nestedFolderURL!