I have renamed my implmentation file that makes use of QREncoder.h, yet I still "unknown type class" which flags QR_Encode.h. I even went all the way up to main.m and renamed it main.mm.
I realize this has been asked many times before, but I have followed those instructions, yet I still the error. Any ideas?
You need to rename all files that reference to QREncoder.h, either directly or indirectly. If you don't mind I can take a look at your code to find out why.