将带有图像的NSTextAttachment添加到NSMutableAttributedString不会立即显示

Question

我试图通过NSTextAttachment将图像添加到NSMutableAttributedString，问题是图像似乎不会出现，直到我重新启动应用程序。有任何想法吗？

var attributesForThisSection = [String : Any]()

if key == NSAttachmentAttributeName {

    let base64Rep = (value as! String)

    if let data = Data(base64Encoded: base64Rep) {

        let textAttachment = NSTextAttachment()
        if let img = NSImage(data: data) {
            textAttachment.image = img
            attributesForThisSection[NSAttachmentAttributeName] = textAttachment
        }
        else {
            print("img from data not ok")
        }

    }

}

然后

let r = NSMakeRange(loc, len)
attributedString?.addAttributes(attributesForThisSection, range: r)

文本显示在NSTextView中，谢谢！

Answer 1

原来我要做的就是替换

textAttachment.image = img

使用

let attachmentCell = NSTextAttachmentCell(imageCell: img)
textAttachment.attachmentCell = attachmentCell