从NSPasteboard检索时backgroundColor属性丢失

Question

当我从NSPasteboard检索NSAttributedString时，背景色丢失了。这就是我要复制的：

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下面是返回的内容(我将其保存为rtf文件)：

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这是我的代码：

func readBoard () {
var board = NSPasteboard.general
    var attr = board.readObjects(forClasses: [NSAttributedString.self])![0] as! NSAttributedString
print(attr)
    export(attributedText: attr)
}

func export(attributedText:NSAttributedString) {

    let file = "Output.rtf"

        do {

            let range = NSRange(location: 0, length: attributedText.length)

            if let data = attributedText.rtf(from: range, documentAttributes: [NSAttributedString.DocumentAttributeKey.characterEncoding : String.Encoding.utf8, NSAttributedString.DocumentAttributeKey.documentType : NSAttributedString.DocumentType.rtf]) {

                if let dir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
                    let url = dir.appendingPathComponent(file)

                    try! data.write(to: url)
                }
            }

        }
        catch {

        }


    }

如何保留backgroundColor属性？谢谢。

编辑：

当我打印board.types时，我得到这样的结果：

Optional(__ObjC.NSPasteboard.PasteboardType(_rawValue: dyn.ah62d4qmxhk4d425try1g44pdsm11g55gsu1e82xnqzv1kpneqz30g6xmsb4g86u)，__ObjC.NSPasteboard.PasteboardType(_rawValue: com.microsoft.Object-Descriptor)，__ObjC.NSPasteboard.PasteboardType(_rawValue: public.rtf)，__ObjC.NSPasteboard.PasteboardType(_rawValue: NeXT Rich Text Format v1.0粘贴板类型)，__ObjC.NSPasteboard.PasteboardType(_rawValue: Public.utf16-外部纯文本)，__ObjC.NSPasteboard.PasteboardType(_rawValue: CorePasteboardFlavorType 0x75743136)，__ObjC.NSPasteboard.PasteboardType(_rawValue: Public.utf8-纯文本)，__ObjC.NSPasteboard.PasteboardType(_rawValue: NSStringPboardType)，__ObjC.NSPasteboard.PasteboardType(_rawValue: dyn.ah62d4rv4gk81n65yru)，__ObjC.NSPasteboard.PasteboardType(_rawValue: CorePasteboardFlavorType 0x7573746C)，__ObjC.NSPasteboard.PasteboardType(_rawValue: com.apple.传统型mac-纯文本)，__ObjC.NSPasteboard.PasteboardType(_rawValue: CorePasteboardFlavorType 0x54455854)，__ObjC.NSPasteboard.PasteboardType(_rawValue: dyn.ah62d4rv4gk81g7d3ru)，__ObjC.NSPasteboard.PasteboardType(_rawValue: CorePasteboardFlavorType 0x7374796C)、__ObjC.NSPasteboard.PasteboardType(_rawValue: public.html)、__ObjC.NSPasteboard.PasteboardType(_rawValue: Apple HTML粘贴板类型)、__ObjC.NSPasteboard.PasteboardType(_rawValue: plain.utf16-纯文本)、__ObjC.NSPasteboard.PasteboardType(_rawValue: CorePasteboardFlavorType 0x75747874)、__ObjC.NSPasteboard.PasteboardType(_rawValue: com.adobe.pdf)、__ObjC.NSPasteboard.PasteboardType(_rawValue: Apple PDF粘贴板类型)、dyn.ah62d4qmxhk4d425try1g44pdsm11g55gsu1en5pcqzwc4y5tsz3gg3k)，(_rawValue: dyn.ah62d4qmxhk4d425try1g44pdsm11g55gsu1e24psrq0zg55zsmv0npneqz30g6xmsb4g86u)，__ObjC.NSPasteboard.PasteboardType(_rawValue: com.microsoft.Link-Source)，__ObjC.NSPasteboard.PasteboardType(__ObjC.NSPasteboard.PasteboardType: dyn.ah62d4qmxhk4d425try1g44pdsm11g55gsu1e24psrq0zg55zsmv0n)，__ObjC.NSPasteboard.PasteboardType(_rawValue: com.microsoft.Link-Source)，__ObjC.NSPasteboard.PasteboardType(_rawValue: com.microsoft.Link- __ObjC.NSPasteboard.PasteboardType(_rawValue: com.microsoft.Link-Source-Descriptor)，__ObjC.NSPasteboard.PasteboardType(_rawValue: dyn.ah62d4qmxhk4d425try1g44pdsm11g55gsu1e82xnqzv1kxdmr3zu)，__ObjC.NSPasteboard.PasteboardType(_rawValue: com.microsoft.ObjectLink)，__ObjC.NSPasteboard.PasteboardType(_rawValue: com.apple.webarchive)，__ObjC.NSPasteboard.PasteboardType(_rawValue: Apple Web Archive粘贴板类型)，__ObjC.NSPasteboard.PasteboardType(_rawValue: Apple __ObjC.NSPasteboard.PasteboardType(_rawValue: com.microsoft.DataObject))

Answer 1

我发现了问题所在。只有在从文本编辑中复制突出显示的文本时，输出才有backgroundColor (可能是因为它是一个rtf文件)。我正在复制Word中的高亮显示。