我将我的Xcode升级到版本7，突然出现以下错误:Sep2415:44:31LogoSwift[10211]:CGContextSaveGState:invalidcontext0x0.Ifyouwanttoseethebacktrace,pleasesetCG_CONTEXT_SHOW_BACKTRACEenvironmentalvariable.Sep2415:44:31LogoSwift[10211]:CGContextTranslateCTM:invalidcontext0x0.Ifyouwanttoseethebacktrace,pleasesetCG_CONTEXT_SHO

它可以通过class-dump工具转储iOS私有(private)框架的runtimeheaders。但我正在寻找IOHIDEvent的header，它已被移动到iOS6之后我找不到的任何地方。但是，在iOS6SDK中有lib看起来像这样:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/System/Library/Extensions/IOHIDFamily.kext/PlugIns/IOHIDLib.plugin如何转储IOHI