My build target is set for IOS5 which is where I understand UIButton.tintColor was introduced...
I have this in my viewDidLoad for the View Controller>
To change the color of the Button text you can use:
resetButton.setTitleColor(UIColor.blackColor(), forState: .Normal)
Or OBJ-C:
- (void)setTitleColor:(UIColor *)color
forState:(UIControlState)state
https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIButton_Class/#//apple_ref/occ/instm/UIButton/setTitleColor:forState: