Three20 linker error

Question

I have the following line of code:

if( !self.isLoading && TTIsEmptyString !TTIsEmptyString(_username) )

and it results in the following error:

Undefined symbols: "_TTIsEmptyString", referenced from: -[UserModel load:more:] in UserModel.o ld: symbol(s) not found collect2: ld returned 1 exit status

I've read, that linker errors come from 'not included' libraries, but the three20 lib is included in my project.

Any ideas?

Answer 1

I believe the latest version of Three20 removed this method without really making as big of a news flash about it as it should have. It took me a while to troubleshoot this, but basically you just need to change all calls to TTIsEmptyString to TTIsSetWithItems, for example:

if( !self.isLoading && !TTIsSetWithItems(_username) )

I hope this works for you.