Try recompiling the document. If the label is after the reference, you need to compile twice to get it to work.
If that doesn't work, this page might help. In short, \usepackage{appendix} and possibly \begin{appendix} etc. might fix it. If it's just a matter of the reference showing up, I can't see how this would help actually, but it might. Without a minimum working example it's hard to give much more advice.
You might also have more luck asking your question here.
发布评论
评论（1）
尝试重新编译该文档。如果标签位于引用之后，则需要编译两次才能使其正常工作。
如果这不起作用，此页面可能会有所帮助。简而言之，
\usepackage{appendix}和可能的\begin{appendix}等可能会修复它。如果这只是显示参考的问题，我看不出这实际上有什么帮助，但可能会有帮助。如果没有最低限度的工作示例，就很难提供更多建议。您也可能更有运气在此处提出问题。
Try recompiling the document. If the label is after the reference, you need to compile twice to get it to work.
If that doesn't work, this page might help. In short,
\usepackage{appendix}and possibly\begin{appendix}etc. might fix it. If it's just a matter of the reference showing up, I can't see how this would help actually, but it might. Without a minimum working example it's hard to give much more advice.You might also have more luck asking your question here.