NSTextView在mac os上复制粘贴NSTextAttachment

Question

我使用了NSTextView，并插入了图像NSTextAttachment。当我选择并复制它，然后粘贴它，它将在textview中显示粘贴的图像，但我无法从NSTextView.attributedString获取内容字符串。为什么？

Answer 1

我有类似的问题。不确定它是否正是您想要的，但我希望能够复制并粘贴NSTextAttachment的字符串表示。

我最终在我的自定义NSTextView类中覆盖了func writeSelection(to pboard: NSPasteboard, type: String) -> Bool：

override func writeSelection(to pboard: NSPasteboard, type: String) -> Bool {
    let selectedAttributedString = attributedString().attributedSubstring(from: selectedRange())
    let selectedAttributedStringCopy = NSMutableAttributedString(attributedString: selectedAttributedString)

    selectedAttributedStringCopy.enumerateAttribute(NSAttachmentAttributeName, in: NSMakeRange(0,(selectedAttributedString.string.characters.count)), options: .reverse, using:  {(_ value: Any?, _ range: NSRange, _ stop: UnsafeMutablePointer<ObjCBool>) -> Void in

        if let textAttachment = value as? NSTextAttachment, let textAttachmentCell = textAttachment.attachmentCell as? YouCustomTextAttachmentCellClass {
            var range2: NSRange = NSRange(location: 0,length: 0)
            let attributes = selectedAttributedStringCopy.attributes(at: range.location, effectiveRange: &range2)

            selectedAttributedStringCopy.replaceCharacters(in: range, with: NSMutableAttributedString(string: textAttachmentCell.yourStringRepresentation))
            selectedAttributedStringCopy.addAttributes(attributes, range: range)

            //  selectedAttributedStringCopy.insert(attachmentAttributedString, at: range.location)

        }
    })

    pboard.clearContents()
    pboard.writeObjects([selectedAttributedStringCopy])

    return true
}

请注意，我使用的是自定义的NSTextAttachmentCell类，它也会记住它的字符串表示形式。