When I\'m running the application on device aftercleaning, removing derived data, first time it runs without any issues. Second time when I\'m trying to run, it say\'s \"A signe
It is still not fixed in XCode 6 RTM. But I found an easy walk around. Simply delete the ShareExtension.appex folder under your build. Then rebuild again. You don't need to clean project, so rebuild is quite fast.
A actually alias the command to do the cleaning
rm -rf ~/Library/Developer/Xcode/DerivedData/-*/Build/Products/Debug-iphoneos/ShareExtension.appex/