ios - Storyboard not opening in Xcode 6.0.1 -

ios - Storyboard not opening in Xcode 6.0.1 -

i developed app ipad using xcode 5.1.1. app worked fine. now, since have updated xcode 6.0.1, storyboard file isn't opening more. on clicking storyboard file project navigator, xcode keeps on loading file , stuck since mac's memory runs out (there 20 vcs in storyboard). when tried compile project, xcode kept on compiling project , build never completed. tried project on xcode 5.1.1 1 time again , worked fine. since upload app on app store, ipa build should latest version , side have back upwards ios 8, can't work more. can please guide me issue is?

ps: xcode 5 crash when open storyboard made xcode 4.6 tried well, since using verdana font, don't think issue in case.

ios xcode ipad xcode6 uistoryboard