A quick SourceForge search suggests librtf. It hasn't been developed in a while, but is listed as stable and is under the LGPL. I don't know whether it will support what you need, but I always suggest searching SourceForge for libraries.
You can ask the #koffice guys on irc.freenode.org over irc. Their program kword is able to open RTF files, and is indeed also written in Qt. I'm sure they would be glad to tell you about how they do it.
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我帮助在 KOffice 中编写 RTF 导入导出过滤器。 您可以在 https://cgit.kde 查看代码.org/koffice.git/tree/filters/kword/rtf。 该代码是模块化的，仅依赖于 Qt。
I helped writing the RTF import export filter in KOffice. You can have a look at the code at https://cgit.kde.org/koffice.git/tree/filters/kword/rtf. The code is modular and it depends only on Qt.
快速 SourceForge 搜索建议 librtf。 它已经有一段时间没有开发了，但被列为稳定的并且处于 LGPL 之下。 我不知道它是否会支持您所需要的，但我总是建议在 SourceForge 中搜索库。
A quick SourceForge search suggests librtf. It hasn't been developed in a while, but is listed as stable and is under the LGPL. I don't know whether it will support what you need, but I always suggest searching SourceForge for libraries.
您可以通过 irc 询问
irc.freenode.org上的#koffice人员。 他们的程序kword能够打开RTF文件，而且确实也是用Qt编写的。 我相信他们会很乐意告诉您他们是如何做到的。You can ask the
#kofficeguys onirc.freenode.orgover irc. Their programkwordis able to open RTF files, and is indeed also written in Qt. I'm sure they would be glad to tell you about how they do it.