iOS how to modify the color of the text after the selected tabbaritem

RT. Novice neighborhoods, without rewriting tabbar be able to modify it under the premise
Reply:
After changing the text color you selected?
I think we can add image, a normal state, a bright state

If it is, then a custom label, label color can be set in the word, but to change the color checked, seemingly is not enough
Hey, I am also a novice