Xcode compiles my App, but can't run it in the simulator

Question

when i compile my app, Xcode just says \"Attaching to Projectname...\" and gets stuck there. The debugger just prints this out:

error: failed to attac

Answer 1

Also make sure none of your file/group name collide with the projects default settings.

Things started breaking for me when I added an info.plist file to my project (Bad Idea). Same happens when you add a "Resource" Group. I don't have an exhaustive list, but if someone does please do share.

Cleaning out / Renaming these conflicting files and following the solution provided by Lindemann(https://stackoverflow.com/a/12504712/2069749) solved the problem for me.