ios 9报警告如下:
CGContextSaveGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
CGContextTranslateCTM: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
CGContextRestoreGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
原因:设置app的状态栏样式的使用使用了旧的方式,在info.plist里面设置了View controller-based status bar appearance为NO
解决方式:删除info.plist中的View controller-based status bar appearance,并将状态栏交给控制器管理