xcode - iOS Storyboard lags and won't open -

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i have project isn't huge, has maybe 6-7 different class files , 5 view controllers. when try open main.storyboard, xcode 6 freezes , lags. i'm running intel i7 4770k , gtx 780, computer should able handle simple this. can open class files , else fine.

here image of problem enter image description here

i "application not responding", , can open storyboard on other projects.

this quite common problem occurs every once in while in xcode. should try following: (each may solve it)

  • clean project working on using cmd+shift+k
  • close (force-quit cmd+alt+esc if necessary) xcode & restart
  • reboot mac
  • uninstall xcode & re-install newest version of it

hope helps :)


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