问题
No provisioned iOS devices are available with a compatible iOS version. Connect an iOS device with a recent enough version of iOS to run your application or choose an iOS simulator as the destination.
I can still compile on my iPhone but not on my friends' iPhone.
回答1:
You need Xcode 4.6 for iOS 6.1 devices
回答2:
ya you need Xcode 4.6 ..check the link for more...
Xcode 4.6 released alongside iOS 6.1
来源：https://stackoverflow.com/questions/14743016/xcode-no-longer-compile-after-my-friend-upgrade-his-iphone-to-6-1