状态栏和导航栏默认高度

// 状态栏(statusbar)CGRect rectStatus = [[UIApplication sharedApplication] statusBarFrame];NSLog(@"status width - %f", rectStatus.size.width); // 宽度NSLog(@"status height - %f", rectStatus.size.height);   // 高度// 导航栏（navigationbar）CGRect rectNav = self.navigationController.navigationBar.frame;NSLog(@"nav width - %f", rectNav.size.width); // 宽度NSLog(@"nav height - %f", rectNav.size.height);   // 高度//打印结果如下：2015-01-14 13:22:22.206 app_name[226:60b] status width - 320.0000002015-01-14 13:22:22.209 app_name[226:60b] status height - 20.0000002015-01-14 13:22:22.210 app_name[226:60b] nav width - 320.0000002015-01-14 13:22:22.211 app_name[226:60b] nav height - 44.000000

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