升级到Xcode5.1后运行基于XCTest的逻辑测试时看到以下错误-很想知道解决方法。2014-03-1112:57:42.258xctest[25605:303]deferralpropertiesmusthaveaclientID2014-03-1112:57:42.258xctest[25605:303]***Assertionfailurein-[BKSEventFocusManagerdeferEventsForClientWithProperties:toClientWithProperties:],/SourceCache/BackBoardServices_Sim/S