swift - 将文件从应用程序包复制并保存到桌面/其他位置

Question

我想将 MIDI 文件保存到某个文件夹。但不幸的是只是得到一个“无标题”txt 文件。

我找到了我尝试过的这段代码:

        let savePanel = NSSavePanel()

        let bundleFile = Bundle.main.url(forResource: "Melody", withExtension: "mid")!

        // this is a preferred method to get the desktop URL
        savePanel.directoryURL = FileManager.default.urls(for: .desktopDirectory, in: .userDomainMask).first!

        savePanel.message = "My custom message."
        savePanel.nameFieldStringValue = "MyFile"
        savePanel.showsHiddenFiles = false
        savePanel.showsTagField = false
        savePanel.canCreateDirectories = true
        savePanel.allowsOtherFileTypes = false
        savePanel.isExtensionHidden = false

        if let url = savePanel.url, savePanel.runModal() == NSApplication.ModalResponse.OK {
            print("Now copying", bundleFile.path, "to", url.path)
            // Do the actual copy:
            do {
             try FileManager().copyItem(at: bundleFile, to: url)
            } catch {
             print(error.localizedDescription)

        } else {
            print("canceled")
        }

将 MIDI 文件从应用程序包复制到例如桌面？？

谢谢!

Answer 1

查看我编写的一些旧代码，将文件从应用程序包复制到某人 Mac 上的某个位置，我必须将文件名作为附加路径组件附加到目标 URL 才能正确复制文件。使用您的代码示例，代码将类似于以下内容:

let name = "Melody.mid"
// url is the URL the user chose from the Save panel.
destinationURL = url.appendingPathComponent(name)
// Use destinationURL instead of url as the to: argument in FileManager.copyItem.