如何使用Swift在MacOS上检查文件是否有红色标签标签在Finder中？

huangapple
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英文:

How can I check if a file has a red tag label in Finder using Swift on MacOS?

问题

我正在为 MacOs 创建我的第一个项目。
我必须处理文件夹中的文件。我的目标是检查这些文件，并查看哪些元素通过 Finder 应用了红色标签。
我真的疯了，因为代码无法识别具有红色标签的图像。

这是我编写的函数。

这是 ViewController 中的代码。

文件信息

英文:

I am creating my first project for MacOs.
I have to work on files in a folder. My goal is to check these files and see which elements have a red tag applied via Finder.
I am literally going crazy because the code cannot recognise the images with the red tag.

This is the function I have written.

  1.  func isFileTaggedRed(at fileURL: URL) -> Bool {
  2.         do {
  3.             let resourceValues = try fileURL.resourceValues(forKeys: [.labelColorKey])
  4.             if let labelColor = resourceValues.labelColor, labelColor == .red {
  5.                 return true
  6.             }
  7.         } catch {
  8.             print("Error retrieving resource values for file: \(error)")
  9.         }
  10.         
  11.         return false
  12.     }

This is the code in the ViewController

  1. for imageUrl in imageUrls {
  2.             if isFileTaggedRed(at: imageUrl) {
  3.                 print("Skipping red tagged image: \(imageUrl.lastPathComponent)")
  4.                 continue
  5.             }else{
  6.                 print("not tagged")
  7.             }
  8.         }

file info

答案1

得分: 2

我不知道是否有更简单的方法来完成您所需的操作，但您可以获取文件的tagNames并检查是否包含"Red"。

  1. extension URL {
  2.     var isFileTaggedRed: Bool {
  3.         tagNames.contains("Red")
  4.     }
  5.     var tagNames: [String] {
  6.         (try? resourceValues(forKeys: [.tagNamesKey]))?.tagNames ?? []
  7.     }
  8. }

用法：

  1. import Cocoa
  3. class ViewController: NSViewController {
  5.     override func viewDidLoad() {
  6.         super.viewDidLoad()
  8.         let folderUrl = FileManager.default.urls(for: .desktopDirectory, in: .userDomainMask).first!
  9.             .appendingPathComponent("untitled folder", isDirectory: true)
  11.         let files = try! FileManager.default.contentsOfDirectory(at: folderUrl, includingPropertiesForKeys: nil)
  13.         if let fileUrl = files.first {
  14.             print("isTaggedRed:", fileUrl.isFileTaggedRed)
  15.         }
  16.     }
  17. }
英文:

I don't know if there is an easier way to accomplish what you need but you can get the fileUrl tagNames and check if it contains "Red"

  1. extension URL {
  2.     var isFileTaggedRed: Bool {
  3.         tagNames.contains("Red")
  4.     }
  5.     var tagNames: [String] {
  6.         (try? resourceValues(forKeys: [.tagNamesKey]))?.tagNames ?? []
  7.     }
  8. }

Usage:

  1. import Cocoa
  3. class ViewController: NSViewController {
  5.     override func viewDidLoad() {
  6.         super.viewDidLoad()
  8.         let folderUrl = FileManager.default.urls(for: .desktopDirectory, in: .userDomainMask).first!
  9.             .appendingPathComponent("untitled folder", isDirectory: true)
  11.         let files = try! FileManager.default.contentsOfDirectory(at: folderUrl, includingPropertiesForKeys: nil)
  13.         if let fileUrl = files.first {
  14.             print("isTaggedRed:", fileUrl.isFileTaggedRed)
  15.         }
  16.     }
  17. }

答案2

得分: 1

I haven't used labelColorKey before. It looks like the labelColor you get back is an NSColor. Colors are tricky in a color-managed system like MacOS. The color may be a shade of red but not the exact color you want. I would suggest logging the RGB values of your returned colors with NSColor.getRed(_:green:blue:alpha:). You're probably getting back a color that's close to, but not exactly equal to .red.

You might need to add code that checks to see if the RGB values are within a "wiggle room" range of .red (say each component is within .01 of the target color.)

Edit:

I just tried it, and when I added a red label to a file, I got back an NSColor that logs as NSCalibratedRGBColorSpace 0.980484 0.382818 0.347662 1

That will look red, but not fully saturated red.

Note that NSColor.red logs as sRGB IEC61966-2.1 colorspace 1 0 0 1 (100% red and no green or blue.)

Furthermore, when I look at a file with a red label, it does look like a slightly washed out red, not pure red.

Edit #2:

The code I used (in a command line tool) is as follows:

  1. func fileColor(at fileURL: URL) -> NSColor? {
  2.    do {
  3.        let resourceValues = try fileURL.resourceValues(forKeys: [.labelColorKey])
  4.        if let labelColor = resourceValues.labelColor {
  5.            return labelColor
  6.        }
  7.    } catch {
  8.        print("Error retrieving resource values for file: \(error)")
  9.        return nil
  10.    }
  11.    
  12.    return nil
  13. }
  15. let path = "~/Documents/RedFile.rtf"
  16. let fixedPath = NSString(string: path).expandingTildeInPath
  17. let fileURL = URL(filePath: fixedPath)
  19. if let fileColor = fileColor(at: fileURL) {
  20.     print("File color returned is \(fileColor)")
  21. } else {
  22.     print("Could not load file.")
  23. }

(Note: I didn't translate the code, as requested.)

英文:

I haven't used labelColorKey before. It looks like the labelColor you get back is an NSColor. Colors are tricky in a color-managed system like MacOS. The color may be a shade of red but not the exact color you want. I would suggest logging the RGB values of your returned colors with NSColor.getRed(_:green:blue:alpha:). You're probably getting back a color that's close to, but not exactly equal to .red.

You might need to add code that checks to see if the RGB values are within a "wiggle room" range of .red (say each component is within .01 of the target color.)

Edit:

I just tried it, and when I added a red label to a file, I got back an NSColor that logs as NSCalibratedRGBColorSpace 0.980484 0.382818 0.347662 1

That will look red, but not fully saturated red.

Note that NSColor.red logs as sRGB IEC61966-2.1 colorspace 1 0 0 1 (100% red and no green or blue.)

Furthermore, when I look at a file with a red label, it does look like a slightly washed out red, not pure red.

Edit #2:

The code I used (in a command line tool) is as follows:

  1. func fileColor(at fileURL: URL) -> NSColor? {
  2.        do {
  3.            let resourceValues = try fileURL.resourceValues(forKeys: [.labelColorKey])
  4.            if let labelColor = resourceValues.labelColor {
  5.                return labelColor
  6.            }
  7.        } catch {
  8.            print("Error retrieving resource values for file: \(error)")
  9.            return nil
  10.        }
  11.        
  12.        return nil
  13.    }
  15. let path = "~/Documents/RedFile.rtf"
  16. let fixedPath = NSString(string:path).expandingTildeInPath
  17. let fileURL = URL(filePath: fixedPath)
  19. if let fileColor = fileColor(at: fileURL) {
  20.     print("File color returned is \(fileColor)")
  21. } else {
  22.     print("Could not load file.")
  23. }

huangapple
  • 本文由 发表于 2023年5月29日 22:56:46
  • 转载请务必保留本文链接：https://go.coder-hub.com/76358359.html
  • macos
  • swift
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  • xcode
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