UIDocumentInteractionController 更改共享文件名

Question

我使用以下代码显示PDF的共享选项

    self.documentController = UIDocumentInteractionController(url: url)
    self.documentController.name = "Test name" // not working
    self.documentController.presentOptionsMenu(from: self.shareButton, animated: true)

问题是我用日期戳保存了 PDF 文件名，以避免有两个同名的文件，但是当显示共享选项时，实际文件名出现了，

有没有办法显示自定义名称而不是实际文件名（我不想将文件复制到其他地方并重命名，浪费时间和性能）

Answer 1

在这种情况下，我们可以创建一个临时文件夹，该文件夹可以包含与 lastPathExtension 相同的文件，即 document.fileExtension，我们可以将这个新文件路径传递给UIDocumentInteractionController.init(url: newFileUrl)

例如：

func openUnsupportedFileWithPath(documentName : String, fileurl : URL, fileExtension : String, aDocument: SILDocumentDB? = nil, sourceView: UIView? = nil) -> Void {

    // Create new temporary path
    let paths: String = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
    var newFileUrl: String = paths.appending("/Downloads/TemporaryFolder)")
    newFileUrl = newFileUrl.appendingFormat("%@","\(documentName)")

    let destinationPathUrl : URL
    do {
        // Move newly filePath with new fileName and fileExtension
        destinationPathUrl = URL(fileURLWithPath: destinanewFileUrltionPath)
        try FileManager.default.moveItem(at: fileurl, to: destinationPathUrl)
    } catch {
        print(error)
    }

    //Pass newly filePath to UIDocumentInteractionController
    documentInteractionController = UIDocumentInteractionController.init(url: newFileUrl)
    documentInteractionController?.name = documentName
    documentInteractionController?.delegate = self

    let canPreview = documentInteractionController?.presentPreview(animated: true)
    if (canPreview == false) {
        let activityViewController = UIActivityViewController.init(activityItems: [fileurl], applicationActivities: nil)

        activityViewController.setValue(documentName, forKey: "subject")
        if ISIPAD {
            activityViewController.popoverPresentationController?.sourceView = sourceView ?? self.view
        }
        self.present(activityViewController, animated: true, completion: nil)
    } 
}

并且 UIDocumentInteractionController 被解除，删除documentInteractionControllerDidEndPreview(_ controller: UIDocumentInteractionController)方法上的临时documentInteractionControllerDidEndPreview(_ controller: UIDocumentInteractionController) 。

public func documentInteractionControllerDidEndPreview(_ controller: UIDocumentInteractionController) {
        documentInteractionController = nil
        let paths: String = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
        let filePath: String = paths.appending("/Downloads/TemporaryFolder)")

        let _fileManager : FileManager  = FileManager.default
        if filePath.length > 0 {
            if _fileManager.fileExists(atPath: filePath) {
                do{
                    try _fileManager.removeItem(atPath: filePath)
                }catch  let error as NSError{

                    print("\(error.localizedDescription)")
                }
            }
        }
    }