如何添加带有单词的scrollview指示符？

I can change the color of a scrollview indicator, but I am lost on how to have words as the scroll view indicator. For example say the first page is blankets, and the second is pillow, and they are in a scroll view. In the toolbar it will say blankets and pillows, and a line will appear under it indicating the user is on that page. Below is the only thing I have done, I am completely lost on how to do this. Any help is appreciated. I can change the color of a scrollview indicato