标签:
- (UIStatusBarStyle)preferredStatusBarStyle;
- (UIViewController *)childViewControllerForStatusBarStyle;
<Error>: CGContextRestoreGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
原文地址:http://www.cnblogs.com/mudy/p/4831807.html