I'm new to iPhone development and Xcode, so this might be really obvious.
I have the exact same problem as referenced on this forum post
I've created a simple list application, starting out with a custom datasource class that simply returns a hard-wired list of data. With that working, I'm now attempting to alter my datasource class to pull data from the address book. I've added a reference to AddressBook/ABAddressBook.h and created an ABAddressBookRef variable. The application compiles fine with that, and I'm able to get Code Sense into the ABAddressBook API. However, if I attempt to initialize my ABAddressBookRef variable by calling ABAddressBookCreate(), I get a link error like this:
"_ABAddressBookCreate", referenced from: -[TestTableDataSource init] in TestTableDataSource.o symbol(s) not found collect2: id returned 1 exit status
The answer to the problem is that he didn't linked the entire framework (see thread)... but what does that mean and how do you do that?