What is the difference between Highlighted and Selected UIButton's State?

Question

Can anyone tell me What is the difference between Highlighted and Selected state of a UIButton?

Answer 1

According to the documentation:

Highlighted state of a control. A control enters this state when a touch enters and exits during tracking and when there is a touch up event.

and

Selected state of a control. For many controls, this state has no effect on behaviour or appearance. But other subclasses may have different appearance depending on their selected state.

this is the pure difference between the states.