请try 以下操作:
[[UITabBar appearance] setTintColor:[UIColor redColor]];
[[UITabBar appearance] setBarTintColor:[UIColor yellowColor]];
要给non active个按钮着色，请将以下代码放入VC的viewDidLoad中:
UITabBarItem *tabBarItem = [yourTabBarController.tabBar.items objectAtIndex:0];
UIImage *unselectedImage = [UIImage imageNamed:@"icon-unselected"];
UIImage *selectedImage = [UIImage imageNamed:@"icon-selected"];
[tabBarItem setImage: [unselectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
[tabBarItem setSelectedImage: selectedImage];
您需要对所有的tabBarItem执行此操作，是的，我知道它很难看，希望有will种更干净的方法来执行此操作.
Swift:个
UITabBar.appearance().tintColor = UIColor.red
tabBarItem.image = UIImage(named: "unselected")?.withRenderingMode(.alwaysOriginal)
tabBarItem.selectedImage = UIImage(named: "selected")?.withRenderingMode(.alwaysOriginal)