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

What finally got the simulator working again for me was deleting everything under Library/Application Support/iPhone Simulator/ within the user directory. What I think caused the problem for me in the first place was trying to use a directory named 'Resources' as described here: https://stackoverflow.com/a/1265168/649

Answer 2

What worked for me was that I realized i was messing with the project settings and accidently removed the info-plist section. After specifying the plist file again properly, it worked. Hope that helps someone.

Answer 3

I fixed my problem by I making a new blank project and importing all the old files.

It must have been a problem with Xcode because it worked before iOS 5.1.

Answer 4

There seems to be quite a lot of things that can cause this error, but for me it turned out to be that I was missing the key CFBundleIdentifier from my plist.

Added it back, and the simulator started normally.

Answer 5

What worked for me was to select 'Delete Derived Data' from the Projects tab in the organiser.

Answer 6

Can't tell you how frustrated I am trying to narrow down the cause of this one. Took me hours. Trial and error here and there.. all leads to nothing until one comment in one of the threads relating to this mentioned about "Executable". Boom! I remember the plist key "Executable file" in my project plist (PROJECT-info.plist). So I got there and found out that that entry was missing. I filled it in with whatever default you see when creating new project, "Executable file" paired with "${EXECUTABLE_NAME}". Build + Run. Then it finally worked!

Btw, I did try all those deleting/resetting stuff found all over SO. None of them works.