ios - NSTextAttachment 图像未在 NSTextView 中显示(但在 UITextView 中)？

Question

我在获取 NSTextAttachment 图像以在 OS X 应用程序的 NSTextView 中工作时遇到问题。

NSTextAttachment 的图像根本不显示。但是，它似乎仍然设置正确。因为在复制 NSTextView 的内容并将其粘贴回例如TextEdit.app，粘贴的文本正确包含图像。

这是重现该问题的最小 Playground :

import Cocoa

let img = NSImage(named: "Checked")

let textView = NSTextView(frame: NSMakeRect(0, 0, 254, 64))

let attrstr = NSMutableAttributedString(string: "Test")

let attch = NSTextAttachment()
attch.image = img

attrstr.appendAttributedString(NSAttributedString(attachment: attch))

textView.textStorage!.setAttributedString(attrstr)

textView

预期输出:

对于 iOS，所以使用 UIKit 而不是 Cocoa，它工作得非常好:

import UIKit

let img = UIImage(named: "Checked")

let textView = UITextView(frame: CGRectMake(0.0, 0.0, 200.0, 44.0))

let attrstr = NSMutableAttributedString(string: "Test")

let attch = NSTextAttachment()
attch.image = img

attrstr.appendAttributedString(NSAttributedString(attachment: attch))

textView.attributedText = attrstr

textView

我正在使用 XCode 7。两个 playground 都可以下载 here .

非常欢迎任何想法，提前致谢!

Answer 1

var thumbnailImage: NSImage? = // some image
var attachmentCell: NSTextAttachmentCell = NSTextAttachmentCell.initImageCell(thumbnailImage!)
var attachment: NSTextAttachment = NSTextAttachment()
attachment.attachmentCell = attachmentCell
var attrString: NSAttributedString = NSAttributedString.attributedStringWithAttachment(attachment)
self.textView.textStorage().appendAttributedString(attrString)