iPhone - 无法将 int 放入 UIButton

Question

我假设这只是因为我很累......但由于某种原因，我无法让我的 UIBUTTONS 填充生成的数字。除答案外，其他数字都是随机生成的。我确信这很简单。谢谢!

- (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] forState: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");
    }
}

编辑:抱歉我不小心放了 UILabels，我的意思是 UIButtons。

Answer 1

Arcrandom 生成 float 或 double，尝试将每个类型强制转换为 int，如下所示:

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