How to decrese the height of ViewController from the bottom when i untap the HeaderView?

Question

How to decrese the height of ViewController from the bottom when I untap the HeaderView i.e. "Discounts and Cashbacks", "Product Description" and "Instructions". When we tap these 3 header views then automatically set the height of view controller according their text.

Tap on 1st HeaderView "Discount and Cashback"

Tap on 2nd HeaderView "Product Desc"

Tap on 3rd HeaderView "Instruction"

move up the tableview cells

when untap the header views