Cocoa/Objective-C 从 posix 路径 (path/to/desktop) 获取 HFS 路径 (path:to:desktop) [英] Cocoa/Objective-C get a HFS path (path:to:desktop) from a posix path (path/to/desktop)

问题描述

我使用的是 OSX，Objective-C.

I am on OSX, Objective-C.

我有一个类似

/Users/xxx/Desktop/image2.png

但我将它传递给第三方应用程序，该应用程序需要像

But i pass it to a third party application that excpects finder pathes like

Harddisk:Users:Desktop:image2.png

是否有任何方法(我找不到)来转换这样的路径或将它们从 NSURL 中取出(如果可能，无需修改字符串)?

Is there any method (i can't find) to convert pathes like that or get them out of an NSURL (if possible without string modifying)?

在 AppleScript 中是

In AppleScript it is

return POSIX file "/Users/xxx/Desktop/image2.png" -->  Harddisk:Users:xxx:Desktop:image2.png

编辑:这几乎相同:可可路径字符串转换不幸的是，该方法已被弃用...

EDIT: This is pretty much the same: Cocoa path string conversion Unfortunately, the method is deprecated...

推荐答案

目前没有(简单的)替代方案.

There is no (easy) alternative at the moment.

函数 CFURLCopyFileSystemPath 未弃用，仅弃用 enum case kCFURLHFSPathStyle 但原始值 1 仍在工作并避免警告.

The function CFURLCopyFileSystemPath is not deprecated, only the enum case kCFURLHFSPathStyle is deprecated but the raw value 1 is still working and avoids the warning.

我正在使用这个类别的NSString

@implementation NSString (POSIX_HFS)

- (NSString *)hfsPathFromPOSIXPath
{
    CFStringRef hfsPath = CFURLCopyFileSystemPath((CFURLRef)[NSURL fileURLWithPath:self], 1);
    return (NSString *)CFBridgingRelease(hfsPath);
}
@end

该函数也适用于 Swift.Swift 版本更复杂一些，并添加了隐式表示字典的尾随分号，这里作为 URL 的扩展:

The function works also in Swift. The Swift version is a bit more sophisticated and adds the trailing semicolon representing a dictionary implicitly, here as an extension of URL:

extension URL {

  func hfsPath() -> String?
  {
    if let cfpathHFS = CFURLCopyFileSystemPath(self as CFURL, CFURLPathStyle(rawValue: 1)!) { // CFURLPathStyle.CFURLHFSPathStyle)
      let pathHFS = cfpathHFS as String
      do {
        let info = try self.resourceValues(forKeys: [.isDirectoryKey, .isPackageKey])
        let isDirectory = info.isDirectory!
        let isPackage =  info.isPackage!

        if isDirectory && !isPackage {
          return pathHFS + ":" // directory, not package
        }
      } catch _ {}
      return pathHFS
    }
    return nil
  }
}

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