iPhone - cannot get int put into UIButton

I am assuming this is just because I am very tired..but for some reason I cannot get my UIBUTTONS to get filled with the numbers that are generated. The numbers are randomly generated except for the answer. I am sure it is something simple. Thanks!

- (void)determineQ {
    first = arc4random() % 1000;
    second = arc4random() % 1000;
    wrong1 = arc4random() % 1000;
    wrong2 = arc4random() % 1000;
    wrong3 = arc4random() % 1000;
    while (first < second) {
        first = arc4random() % 1000;
    }
    [question setText:[NSString stringWithFormat:@"%d - %d = ?", first, second]];
    answer = first - second;
    NSLog(@"%d - %d = %d", first, second, answer);
    correctLetter = arc4random() % 100;
    if (correctLetter <= 25) {
        [ans2 setTitle:[NSString stringWithFormat:@"%d", answer] forState:UIControlEventAllEvents];
        [ans2 setTitle:[NSString stringWithFormat:@"%d", wrong1] forState:UIControlEventAllEvents];
        [ans3 setTitle:[NSString stringWithFormat:@"%d", wrong2] forState:UIControlEventAllEvents];
        [ans4 setTitle:[NSString stringWithFormat:@"%d", wrong3] forState:UIControlEventAllEvents];
        NSLog(@"The answer is A");
    } else if (correctLetter <= 50) {
        [ans1 setTitle:[NSString stringWithFormat:@"%d", wrong1] forState:UIControlEventAllEvents];
        [ans2 setTitle:[NSString stringWithFormat:@"%d", answer] forState:UIControlEventAllEvents];
        [ans3 setTitle:[NSString stringWithFormat:@"%d", wrong2] forState:UIControlEventAllEvents];
        [ans4 setTitle:[NSString stringWithFormat:@"%d", wrong3] forState:UIControlEventAllEvents];
        NSLog(@"The answer is B");
    } else if (correctLetter <= 75) {
        [ans1 setTitle:[NSString stringWithFormat:@"%d", wrong1] forState:UIControlEventAllEvents];
        [ans2 setTitle:[NSString stringWithFormat:@"%d", wrong2] forState:UIControlEventAllEvents];
        [ans3 setTitle:[NSString stringWithFormat:@"%d", answer] forState:UIControlEventAllEvents];
        [ans4 setTitle:[NSString stringWithFormat:@"%d", wrong3] for开发者_JAVA百科State:UIControlEventAllEvents];
        NSLog(@"The answer is C");
    } else if (correctLetter <= 100) {
        [ans1 setTitle:[NSString stringWithFormat:@"%d", wrong1] forState:UIControlEventAllEvents];
        [ans2 setTitle:[NSString stringWithFormat:@"%d", wrong2] forState:UIControlEventAllEvents];
        [ans3 setTitle:[NSString stringWithFormat:@"%d", wrong3] forState:UIControlEventAllEvents];
        [ans4 setTitle:[NSString stringWithFormat:@"%d", answer] forState:UIControlEventAllEvents];
        NSLog(@"The answer is D");
    }
}

EDIT: Sorry I had accidentally put UILabels, I meant UIButtons.

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Arcrandom generates float or double, try cast each to int like this:

 [ans2 setTitle:[NSString stringWithFormat:@"%d", ((int)answer)] forState:UIControlEventAllEvents];

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If you are using UILabel. use the setText instead of setTitle,

    [ans2 settext:[NSString stringWithFormat:@"%d", answer]];

OR

ans2.text = [NSString stringWithFormat:@"%d", answer];

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I figured it out, I should not have been waiting for a Control Event in the forState, it should have been this

    [ans2 setTitle:[NSString stringWithFormat:@"%d", answer] forState:UIControlStateNormal];