Necessary to clean every time when building with XCode 4?

As the title states, if开发者_如何学编程 I don't clean my project before building, neither the simulator nor the iPhone is able to get my most recent code changes. Has anyone else experienced this problem or does anyone know of a fix?

Yes. Although I haven't experienced it a lot. Plus its recommended. If you watch iPhone Dev Videos taught at stanford by Alan Cannistraro (One of the Apple engineer's who worked on Cocoa Touch framwworks) recommends doing that.

Once I upgraded versions, this problem went away on it's own. It must have been a bug or a configuration issue of some kind, so I'm marking this as answered.