The answer is NO.
The parameter for `forState:` is just a bit pattern.
UIControlStateNormal 000
UIControlStateHighlighted 001
So, Logical OR(UIControlStateNormal | UIControlStateHighlighted) just generates 001, exactly the same bit pattern as UIControlStateHighlighted.
You may need to repeat calling the same method:
UIFont *barButtonFont = [UIFont boldSystemFontOfSize:12.0];
[barButtonObj setTitleTextAttributes:@{ NSFontAttributeName : barButtonFont } forState:UIControlStateNormal];
[barButtonObj setTitleTextAttributes:@{ NSFontAttributeName : barButtonFont } forState:UIControlStateHighlighted];
And, this may not be an issue in your case, but UIControl may be in some other states.
UIControlStateDisabled 010
UIControlStateSelected 100
So, the bit pattern 011 represents the state `hilighted and disabled`, which is represented in Objective-C as `UIControlStateHighlighted | UIControlStateDisabled`. Which UIControl distinguishes from simple UIControlStateHighlighted.
So, if you utilize the control state disabled and selected and set exactly the same font for all possible states,
you may need to write more lines...
UIFont *barButtonFont = [UIFont boldSystemFontOfSize:12.0];
[barButtonObj setTitleTextAttributes:@{ NSFontAttributeName : barButtonFont } forState:UIControlStateNormal];
[barButtonObj setTitleTextAttributes:@{ NSFontAttributeName : barButtonFont } forState:UIControlStateHighlighted];
[barButtonObj setTitleTextAttributes:@{ NSFontAttributeName : barButtonFont } forState:UIControlStateDisabled];
[barButtonObj setTitleTextAttributes:@{ NSFontAttributeName : barButtonFont } forState:UIControlStateHighlighted|UIControlStateDisabled];
[barButtonObj setTitleTextAttributes:@{ NSFontAttributeName : barButtonFont } forState:UIControlStateSelected];
[barButtonObj setTitleTextAttributes:@{ NSFontAttributeName : barButtonFont } forState:UIControlStateHighlighted|UIControlStateSelected];
[barButtonObj setTitleTextAttributes:@{ NSFontAttributeName : barButtonFont } forState:UIControlStateDisabled|UIControlStateSelected];
[barButtonObj setTitleTextAttributes:@{ NSFontAttributeName : barButtonFont } forState:UIControlStateHighlighted|UIControlStateDisabled|UIControlStateSelected];