I get the following error when building and running the main application documented on page 47 using Xcode 4.2.
Undefined symbols for architecture x86_64:
“OBJC_CLASS$_Possession”, referenced from:
objc-class-ref in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Any ideas? i’m stumped…
Also, how do I build the Possession class as it doesn’t seem that i’m allowed to as its greyed out in the drop down.