xcode6 - Xcode won't run app due to some runtime error -


xcode keeps giving me weird error when run app on simulator.

the operation couldn’t completed. (launchserviceserror error 0.)

when run on iphone 

coregraphics can't load

i deleted folder (a friend told me too.) 

~/library/developer/xcode/deriveddata

i did find frameworks in trash , pressed "put-back" option.

can tell me how fix this? i'm running xcode 7 - beta 2.

i ended doing , worked fine.

step 1) go xcode preferences -> accounts -> more info. hit refresh icon.  step 2) clean project. project -> clean.  step 3) force quit xcode.  step 4) reboot mac , device.

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