在我修复MainStoryboard.storyboard中的一些冲突后，Xcode发生构建错误:Command/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/ibtoolfailedwithexitcode255ibtoold[26299:507][MT]DVTAssertions:ASSERTIONFAILUREin/SourceCache/IDEInterfaceBuilder/IDEInterfaceBuilder-5056/Inter