最近在测试的过程当中, 发现了SpringBoar的一个问题:app
SpringBoard[53] <Error>: CGContextTranslateCTM: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.测试
同时也发现了应用有类型的问题:thread
Aug 6 13:11:50 Tour1[17353] <Error>: CGContextSaveGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.bug
苹果的连接以下:developer
https://forums.developer.apple.com/thread/13683apple
应该是iOS9系统引入的bug.vi