Unable to run app in Simulator Xcode 6

Question

Yesterday i was testing my app in the iOS simulator and everything was working fine. I then decided to run the app on my iPhone and i got the error unable to install appli

Answer 1

Generally it means there is a problem with the build, it may be due to old cache (solved by a clean build) or a project definition error (missing library, bad definition in info.plist, etc).

In my case it happened only on iOS 8, turns out that my widget had the wrong bundle ID.

Answer 2

In that kind of cases I usually :

• Product > Clean
• Close xCode
• Delete the Derived Data (in ~/Library/Developer/Xcode/DerivedData subfolders)
• Delete the app on the iPhone
• Reboot the iPhone
• Restart and rebuild

Answer 3

I had this problem. In my case, it was caused by the Build value being blank. After putting a value there, and resetting the simulator once more, the issue went away.

Answer 4

I had the same problem and checking the system log carefully helped me to identify a coliding library that was causing this error. You can also check this answer if you are using extensions.