LaunchScreen.storyboard: The document “(null)” requires Xcode 8.0 or later

项目Xcode8出来了,然后又装了一个xcode7,但,就换Xcode7来打开工程,出现

LaunchScreen.storyboard: The document “(null)” requires Xcode  or later
           

用编辑器将Xib里面的下面一句话删除掉才能打开：  右击->Open As ->Source code

<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>

删除就好！！！