Modifications to a UIButton's label are reset when the button state changes

When modifying properties directly on a UIButton's label (titleLabel), the changes may be discarded when the state of the parent UIButton changes.

This is due to directly modifying the UILabel properties rather than going through the UIButton designated methods.

For example, UIButton maintains an internal pairing of UIControlState to NSString values that are set when updated through the designated setter setTitle:forState:. Modification of the button's title directly via the label may be overridden by the button based on its title/control state mapping.