SKScene not rendering when I need to update a SKLabelNode - rendering

Question

I am programming a game, and using a SKLabel to view the current score. The problem is that when score changes it doesn't display the change in the screen at the moment, it does after a second more or less. What can I do to see the changes in the moment I use [sklabelscore setTextScore:++self.score]. Can I force render or something similar?
I call the setTextScore when the user touches an enemy, with touchesBegan:withEvent:
setTextScore: implementation is
SKLabelNode* scoreLabel=(SKLabelNode*)[self childNodeWithName:#"scoreLabel"];
scoreLabel.text=[NSString stringWithFormat:#"Score: %d",self.score];

Answer 1

It seems most likely that the ++score you increment is a local variable and not the same as self.score.
You call the method as follows:
[sklabelscore setTextScore:++score]
Which means its signature with code must be:
-(void) setTextScore:(int)theNewScore
{
SKLabelNode* scoreLabel=(SKLabelNode*)[self childNodeWithName:#"scoreLabel"];
scoreLabel.text=[NSString stringWithFormat:#"Score: %d",self.score];
}
So you're passing in theNewScore but instead of using that in the format string you use self.score which may never be updated if the incremented ++score variable is a local variable (ie never assigns its new value to self.score).

Answer 2

Solved... I feel like an idiot :S
The problem was I fade out the enemy when I touched it, and then, after 0.5 seconds, changes the label. I put that out of the block and all working fine.
Changed setTextScore: method because was redundant (thanks #LearnCocos2D)
...
SKAction* fade=[SKAction fadeOutWithDuration:0.5];
[node runAction:fade completion:^{
[node removeFromParent];
self.enemyNumber--;
self.score++;
SKLabelNode* scoreLabel=(SKLabelNode*)[self childNodeWithName:#"scoreLabel"];
scoreLabel.text=[NSString stringWithFormat:#"Score: %d",self.score];
}];
The new form (outside of the block):
...
self.score++;
SKLabelNode* scoreLabel=(SKLabelNode*)[self childNodeWithName:#"scoreLabel"];
scoreLabel.text=[NSString stringWithFormat:#"Score: %d",self.score];
SKAction* fade=[SKAction fadeOutWithDuration:0.5];
[node runAction:fade completion:^{
[node removeFromParent];
}];
Thanks for your help and sorry for asking this stupid question...