objective c - How do I weak link frameworks on Xcode 4?

Question

I need to weak link some framework with my target.
But I can't find how to do it...

If I try to run my project on 3.2 iPad simulator i get the following error:

dyld: Library not loaded: /System/Library/Frameworks/iAd.framework/iAd
Reason : Image not found

Thanks !

Answer 1

Go to your project -> Targets -> Build Phases -> Link Binary with Libraries.

Then change the library you want to weak-link from "Required" to "Optional".