适用于iOS的Podofo;编写PDF文件后“找不到目录对象”

I have built Podofo 0.9.3 for iOS along with all the other needed libraries to support amrv7, arm64 and simulator. My project runs fine, but my problem is loading a document for the second time. I always get the error "Catalog object not found" in Podofo. If I open the document using Preview app on mac, and save it, Podofo can open it again.I have built Podofo 0.9.3 for iOS along with al