正在从 .txt 文件加载文本 iOS

Question

我一直在尝试将基于 Mac OS 的测验应用程序转换为 iOS，因为我喜欢从单个 .txt 文件加载所有问题的想法.

我对 Objective-C 语言还是很陌生，因为我以前使用过 C#。

通过此函数加载问题和答案：

- (void)loadQuestionsAndAnswersArray {
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Quiz1" ofType:@"txt"];
    NSString *textFileString = [NSString stringWithContentsOfFile:filePath encoding:NSStringEncodingConversionAllowLossy error:NULL];

    NSArray *seperatedQA = [textFileString componentsSeparatedByString:@"\n\n"];

    for (NSString *QA in seperatedQA) {
        NSString *questionString = [[[QA componentsSeparatedByString:@"\n"] objectAtIndex:0] stringByReplacingOccurrencesOfString:@"Q:" withString:@""];

        NSMutableArray *answers = [[QA componentsSeparatedByString:@"A:"] mutableCopy];
        [answers removeObjectAtIndex:0];

        int correctAnswerLoc = 0;

        for (int i = 0; i < answers.count; i++) {
            NSString *answer = [answers objectAtIndex:i];
            NSString *editedAnswer = [answer stringByReplacingOccurrencesOfString:@"\n" withString:@""];
            editedAnswer = [editedAnswer stringByTrimmingCharactersInSet:
                            [NSCharacterSet whitespaceAndNewlineCharacterSet]];
            [answers removeObjectAtIndex:i];
            [answers insertObject:editedAnswer atIndex:i];
            answer = editedAnswer;
            if ([answer rangeOfString:@"[CORRECT]"].location != NSNotFound) {
                correctAnswerLoc = [answers indexOfObject:answer];
                NSString *editedAnswer = [answer stringByReplacingOccurrencesOfString:@"[CORRECT]" withString:@""];
                [answers removeObjectAtIndex:i];
                [answers insertObject:editedAnswer atIndex:i];
            }
        }

        NSLog(@"answers = %@", answers);

        NSDictionary *QADictionary = [NSDictionary dictionaryWithObjectsAndKeys:questionString, @"question", answers, @"answers", [NSNumber numberWithInt:correctAnswerLoc], @"correctAnswerLocation", nil];

        [questionsAndAnswers addObject:QADictionary]; 
    }   

    resultsArray = [[NSMutableArray alloc] initWithCapacity:[questionsAndAnswers count]];
}

然后该应用程序有一个问题文本字段和 3 个按钮，每个按钮对应一个答案。当出现新问题时，它会更改文本字段中的文本和按钮的标题。

此代码在 Mac 应用程序上非常有用，但在 iOS 版本上它就像找不到 txt 文件，按钮等留空。

我已经坐了大约一个星期了，这就是 post 的原因。

iOS 应用基于此 Github Mac 应用：https://github.com/SquaredTiki/Quizzer

如果您想了解我是如何尝试将应用程序转换为以下 link 的： https://www.dropbox.com/s/1jqz9ue97p3v2h1/iTrafikk.zip?dl=0

当然，我并不是要你为我解决整个问题，如果可能的话，也许只是把我推向正确的方向:)

Answer 1

我检查了你的项目。而且您似乎没有在代码中的任何地方调用 loadQuestionsAndAnswersArray 。此外，您没有在项目的任何地方初始化 questionsAndAnswers。

像这样更改您的代码：

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self loadQuestionsAndAnswersArray];
}

- (void)loadQuestionsAndAnswersArray
{
    NSString *filePath       = [[NSBundle mainBundle] pathForResource:@"Quiz1" ofType:@"txt"];
    NSString *textFileString = [NSString stringWithContentsOfFile:filePath encoding:NSStringEncodingConversionAllowLossy error:NULL];
    NSArray *seperatedQA     = [textFileString componentsSeparatedByString:@"\n\n"];

    for (NSString *QA in seperatedQA)
    {
        NSString *questionString = [[[QA componentsSeparatedByString:@"\n"] objectAtIndex:0] stringByReplacingOccurrencesOfString:@"Q:" withString:@""];
        NSMutableArray *answers  = [[QA componentsSeparatedByString:@"A:"] mutableCopy];

        [answers removeObjectAtIndex:0];

        int correctAnswerLoc = 0;

        for (int i = 0; i < answers.count; i++)
        {
            NSString *answer       = [answers objectAtIndex:i];
            NSString *editedAnswer = [answer stringByReplacingOccurrencesOfString:@"\n" withString:@""];
            editedAnswer           = [editedAnswer stringByTrimmingCharactersInSet:
                            [NSCharacterSet whitespaceAndNewlineCharacterSet]];
            [answers removeObjectAtIndex:i];
            [answers insertObject:editedAnswer atIndex:i];
            answer = editedAnswer;
            if ([answer rangeOfString:@"[CORRECT]"].location != NSNotFound)
            {
                correctAnswerLoc       = [answers indexOfObject:answer];
                NSString *editedAnswer = [answer stringByReplacingOccurrencesOfString:@"[CORRECT]" withString:@""];
                [answers removeObjectAtIndex:i];
                [answers insertObject:editedAnswer atIndex:i];
            }
        }

        NSLog(@"answers = %@", answers);

        NSDictionary *QADictionary = [NSDictionary dictionaryWithObjectsAndKeys:questionString, @"question", answers, @"answers", [NSNumber numberWithInt:correctAnswerLoc], @"correctAnswerLocation", nil];
        if (!questionsAndAnswers)
        {
            questionsAndAnswers = [[NSMutableArray alloc] init];
        }
        [questionsAndAnswers addObject:QADictionary]; 
    }   

    resultsArray = [[NSMutableArray alloc] initWithCapacity:[questionsAndAnswers count]];
    [self loadQuestionsAndAnswersIntoInterface];
}

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