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我正在制作一个包含几个不同类别的测验应用程序。我还有一些事情要做，但我遇到了标题中的错误。这是我的代码到目前为止的样子

-(IBAction)Category1:(id)sender{

    Category1.hidden = YES;
    Category2.hidden = YES;
    Question.hidden = NO;

    Answer1.hidden = NO;
    Answer2.hidden = NO;
    Answer3.hidden = NO;
    Answer4.hidden = NO;

    Right1.hidden = YES;
    Right2.hidden = YES;
    Right3.hidden = YES;
    Right4.hidden = YES;

    Wrong1.hidden = YES;
    Wrong2.hidden = YES;
    Wrong3.hidden = YES;
    Wrong4.hidden = YES;

    SelectCategory.hidden = YES;

    NSMutableArray *questionArray = [[NSMUTABLEArray alloc] init];
    for (int i = 1; i < 101; i++) {
        [questionArray addObject:[NSNumber alloc] initwithInt:i]];  // Here is where the error occurs
    }

    for (int i = 0; i < 100; i++) {

        int randomIndex = arc4random() % [questionArray count];
        int Category1Question = [[questionArray objectAtIndex:randomIndex] intValue];
        [questionArray removeObjectAtIndex:randomIndex];
        switch (Category1Question) {
            case 0:
            Question.text = [NSString stringWithFormat:@"Question here"];
            Right1.hidden = NO;
            Wrong2.hidden = NO;
            Wrong3.hidden = NO;
            Wrong4.hidden = NO;
            Answer1.text = [NSString stringWithFormat:@"Correct answer here"];
            Answer2.text = [NSString stringWithFormat:@"Wrong answer here"];
            Answer3.text = [NSString stringWithFormat:@"Wrong answer here"];
            Answer4.text = [NSString stringWithFormat:@"Wrong answer here"];
            break;
            case 1:
            // etc etc all the way to case 99

           default:
               break;
        }
    }
}

我根本想不通。请如果有人可以帮助并向我解释，我将非常感激。谢谢

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2 回答 2

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没有initwithInt:，但有一个initWithInt:，Objective-C 区分大小写。

你[的位置错误：

 [questionArray addObject:[NSNumber alloc] initwithInt:i]];

应该：

 [questionArray addObject:[[NSNumber alloc] initWithInt:i]];

甚至更好：

 [questionArray addObject:[NSNumber numberWithInt:i]];
于 2013-08-06T14:54:59.323 回答
0

尝试：

[questionArray addObject:@(i)];
于 2013-08-06T14:53:53.320 回答