iOS easier way to keep button in highlight mode after touch?

-(IBAction) selectFourVoice:(id)sender {
	UIButton *fourVoice = nil;
	
	for (int i = EvenTone; i <= 400; i+=100) {
		fourVoice = (UIButton *)[self viewWithTag:i];
		
		fourVoice.enabled = YES;
		fourVoice.highlighted = NO;
	}
	
	fourVoice = (UIButton *)sender;
	
	for (int i = 1; i <= 4; i++) {
		for (int j = 1 + 100 * i; j <= 100 * i + 10; j++) {
			UIButton *key = (UIButton *)[self viewWithTag:j];
			
			[self setKeyTitle:key forTone:fourVoice.tag];
		}
	}

	[NSTimer scheduledTimerWithTimeInterval:0.0 target:self selector:@selector(timerSetKeyHighlight:) userInfo:fourVoice repeats:NO];
}

-(void) timerSetKeyHighlight:(NSTimer *)timer {
	UIButton *fourVoice = (UIButton *)[timer userInfo];
	fourVoice.highlighted = YES;
	fourVoice.enabled = NO;	
}