c++ - vtable for .. referenced from compile error xcode

Question

I was getting the following error compiling an iPhone project:

"vtable for oned::MultiFormatUPCEANReader", referenced from:
      __ZTVN4oned23MultiFormatUPCEANReaderE$non_lazy_ptr in MultiFormatUPCEANReader.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

Anybody know how I may fix it?

Answer 1

The problem seemed to be that in the class MultiFormatUPCEANReader I had declared a constructor and destructor, but had not written a body for the destructor, this was causing this annoying problem. Hope this helps somebody solve their compile error. This is a terrible compiler error with little information!