External library working in Debug profile but not in Release profile on iOS 3.1.*

Question

Hi!

I'm having a problem with my Three20-based application. It works perfectly fine on iOS 4, but on iOS 3.1.*, it only works with the Debug profile. When I try the Release profile, the application crashes with [NSObject doesNotRecognizeSelector:] at the first call to a Three20 method. If I comment out all Three20 method calls, the app works fine.

Some debugging gives that calling alloc on a Three20 class works fine, and so is calling init on that alloc. But as soon as I call a method that's only implemented by Three20 - boom.

I'm very startled. Any ideas? I'd be most grateful!

Answer 1

FYI I found the answer here: http://github.com/facebook/three20/issues/issue/254