导航栏..

 // 导航栏颜色，还有底部一根线

    BaseRTNavigationController *nav = (BaseRTNavigationController *)self.navigationController;

    nav.navigationBar.shadowImage = nil;

    self.navigationController.navigationBar.barTintColor = Background_Color;    背景颜色

tintColor是字体颜色

2019-01-11

突然发现这逼的方法更好

https://www.jianshu.com/p/aa547432eae0