Hide dynamically created UILabels in IBAction - ios

Question

I have declared UILabel in ViewController first like this:
#property (weak, nonatomic) IBOutlet UILabel *answerLabel;
Then I have created label in a loop:
//creating answer labels
i = 0;
int y=200;
while (i < numberOfAnswers) {
UILabel *answerLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, y, 300, 20)];
answerLabel.text = [NSString stringWithFormat:#"%# (%#)", questionBank[randomQuestionNumber][1][i][0],questionBank[randomQuestionNumber][1][i][1]];
answerLabel.hidden=NO;
[self.view addSubview:answerLabel];
i++;
y = y + 20;
}
In the IBAction I have this but it doesn't work. Any ideas where the mistakes is?
- (IBAction)nextQuestion:(id)sender {
//hiding labels
self.answerLabel.hidden=YES;
}

Answer 1

I would suggest first create view and then add those labels in this view.
Now when you need to hide, just hide this view.
Hope this answer.
For what you are doing, it is lengthy way. First white creating label you have to set tag. Then for hiding, again get label by tag and then hide accordingly.

Answer 2

Your code contains lots of issues.
First of all, when you are talking about multiple outlets, in the declaration it should be outletCollection like this:
#property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *answerLabels;
Again, as you are creating your labels dynamically, you just can't add them in your IBOuletCollection.
#FahimParkar is suggesting a good approach. But as you might need to work with individual labels, you might use following approach..
First declare an array of labels like this:
#property (strong, nonatomic) NSMutableArray *answerLabels;
Now when you are creating the label, alloc your array & add new labels in it like this:
i = 0;
int y=200;
self.answerLabels= [[NSMutableArray alloc]init]
while (i < numberOfAnswers) {
UILabel *answerLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, y, 300, 20)];
answerLabel.text = [NSString stringWithFormat:#"%# (%#)", questionBank[randomQuestionNumber][1][i][0],questionBank[randomQuestionNumber][1][i][1]];
answerLabel.hidden=NO;
[self.view addSubview:answerLabel];
[self.answerLabels addObject:answerLabel]
i++;
y = y + 20;
}
Now when you want to hide a particular label, you can do this by referring anyone of these three:
Array index.
labelText.
add tag for your label as suggested by Fahim & refer to it.. :)
Let me know if more info needed.. :)