UIButton title color change on highlight – How to turn it off?

you can use

[UIButton setTitleColor:forState:]

for all the states , then title color will remain same for all states.

[button setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
[button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button setTitleColor:[UIColor redColor] forState:UIControlStateSelected];

Note:To avoide type or paste above code three times you can use following code suggested by Will,

[button setTitleColor:[UIColor redColor] forState:(UIControlStateHighlighted | UIControlStateNormal | UIControlStateSelected)];