self.navigationController.navigationBar.barTintColor = [UIColor redColor];

    self.navigationController.navigationBar.titleTextAttributes = [NSDictionary dictionaryWithObject:[UIColor whiteColor] forKey:NSForegroundColorAttributeName];

    // 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//(一般是20.0)

    //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（一般是44.0）