Macos 如何使用表情符号制作NSTextfield？

我正在尝试在mac上开发XMPP聊天客户端。 我想让带有表情符号的聊天文本字段像Skype一样

我试着这样做：

NSMutableAttributedString*mastring=[[NSMutableAttributedString alloc]initWithAttributedString:astring]； NSImage*emoticon=[NSImage imagename:@“smile.png”]； NSTextAttachmentCell*attachmentCell=[[NSTextAttachmentCell alloc]initImageCell:emoticon]； NSTextAttachment*附件=[[NSTextAttachment alloc]init]； [附件setAttachmentCell:attachmentCell]； NSAttributedString*attributedString=[NSAttributedString attributedStringWithAttachment:attachment]； [allstring insertAttributedString:attributedString索引：1]； 因此，我将表情图标图像插入到NSTextField中，但无法将表情图标图像复制/粘贴到另一个NSTextField中。 请给我技术。谢谢大家

NSMutableAttributedString* mastring = [[NSMutableAttributedString alloc] initWithAttributedString:astring]; NSImage * emoticon = [NSImage imageNamed:@"smile.png"]; NSTextAttachmentCell *attachmentCell = [[NSTextAttachmentCell alloc] initImageCell:emoticon]; NSTextAttachment *attachment = [[NSTextAttachment alloc] init]; [attachment setAttachmentCell: attachmentCell ]; NSAttributedString *attributedString = [NSAttributedString attributedStringWithAttachment: attachment]; [allstring insertAttributedString:attributedString atIndex:1];