设置Tabbar和NavigationBar的颜色

    //tabbar图标颜色
    UITabBar.appearance().tintColor = UIColor.themeBackgroundColor()
    //NavigationBar背景色
    UINavigationBar.appearance().barTintColor = UITabBar.appearance().tintColor
    //NavigationBar图标颜色
    UINavigationBar.appearance().tintColor = .white
    UINavigationBar.appearance().isTranslucent = true
    UINavigationBar.appearance().barStyle = .black
    //NavigationBar标题颜色
    UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName:UIColor.white]

只要上面几句就可以设置tabbar和navigationbar的颜色了