No visible @interface for

Question

I have gotten this error on several occasions and am unclear as to what causes the error in general. After looking for over an hour on stack overflow and google I still don\

Answer 1

Any chance you are on Xcode 4.2 (or less), running code that was written on Xcode 4.3? In 4.3+ Xcode doesn't require you to declare private methods at all, it just assumes that methods written in the implementation file (without declarations in the interface) are private. But in Xcode <= 4.2, this will throw an error and those methods need to be at least declared privately