iOS SDK: Moving the button into the center of screen by code

Question

I want to move a button to the center of the screen by code. I saw somewhere it is just few lines of code, but could not find them.

Answer 1

This centers the button in its superview:

CGRect bounds = button.superview.bounds;
button.center = CGPointMake(CGRectGetMidX(bounds), CGRectGetMidY(bounds));