用URL中的波浪号替换用户路径

Question

假设文件URL包含/Users/me/a/b。有没有比使用NSHomeDirectory()替换天真字符串更好的方法来获取短格式~/a/b？

这就是我目前使用的

.replacingOccurrences(of: NSHomeDirectory(), with: "~", options: .anchored, range: nil)

PS：没有NSString施法！

Answer 1

如何转换为NSString然后用以下内容缩写：

var path = url.path as NSString!
var abbrevPath=path?.abbreviatingWithTildeInPath

Answer 2

NSPathUtilities      - （NSString *）stringByAbbreviatingWithTildeInPath;      - （NSString *）stringByExpandingTildeInPath;

app.module.ts

Answer 3

如果您在沙盒应用程序中，则需要使用getpwuid函数。

extension FileManager {
   /// Returns path to real home directory in Sandboxed application
   public var realHomeDirectory: String? {
      if let home = getpwuid(getuid()).pointee.pw_dir {
         return string(withFileSystemRepresentation: home, length: Int(strlen(home)))
      }
      return nil
   }
}

用法示例：

func configure(url: URL) {
  ...
  var directory = url.path.deletingLastPathComponent
  toolTip = url.path
  if let homeDir = FileManager.default.realHomeDirectory {
     // FYI: `url.path.abbreviatingWithTildeInPath` not working for sandboxed apps.
     let abbreviatedPath = url.path.replacingFirstOccurrence(of: homeDir, with: "~")
     directory = abbreviatedPath.deletingLastPathComponent
     toolTip = abbreviatedPath
  }
  directoryLabel.text = directory
}

有关getpwuid函数的更多信息：How do I get the users home directory in a sandboxed app?

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在NSView中的使用结果：

Answer 4

我注意到此问题尚未得到接受，我遇到了同样的问题。我尝试了NSString方法，但是无论如何这些方法在沙盒环境中都不起作用，并且getpwuid方法感到……是错误的。因此，这是一个纯粹的Swift解决方案，仅在假定沙箱根与实际主目录共享前三个路径组件（/，Users，用户名）的情况下，才进行真正的硬编码：

extension URL {
    var pathAbbreviatingWithTilde: String {
        // find home directory path (more difficulty because we're sandboxed, so it's somewhere deep in our actual home dir)
        let sandboxedHomeDir = FileManager.default.homeDirectoryForCurrentUser
        let components = sandboxedHomeDir.pathComponents
        guard components.first == "/" else { return path }
        let homeDir = "/" + components.dropFirst().prefix(2).joined(separator: "/")
        
        // replace home dir in path with tilde for brevity and aesthetics
        guard path.hasPrefix(homeDir) else { return path }
        return "~" + path.dropFirst(homeDir.count)
    }
}