ios导航栏字体颜色及背景色设置rgb

//设置导航栏字体大小颜色
[self.navigationController.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
[UIColor colorWithRed:44.0f/255.0f green:141.0f/255.0f blue:228.0f/255.0f alpha:1.0],
 NSForegroundColorAttributeName, [UIFont systemFontOfSize:18*kViewWidth/320], NSFontAttributeName, nil]];

//设置导航栏背景色
self.navigationController.navigationBar.barTintColor =
[UIColor colorWithRed:230.0f/255.0f green:230.0f/255.0f blue:230.0f/255.0f alpha:1.0];