Question

我有以下代码来读取.txt文件并将其放入用于NSScanner的字符串中。

    NSString *Period1String = [[NSBundle mainBundle] pathForResource: @"Period1String" ofType: @"txt"];
    NSString *Period2String = [[NSBundle mainBundle] pathForResource: @"Period2String" ofType: @"txt"];
    NSString *Period3String = [[NSBundle mainBundle] pathForResource: @"Period3String" ofType: @"txt"];
    NSString *Period4String = [[NSBundle mainBundle] pathForResource: @"Period4String" ofType: @"txt"];
    NSString *Period5String = [[NSBundle mainBundle] pathForResource: @"Period5String" ofType: @"txt"];

    NSURL *requestTimetableURL = [NSURL URLWithString:@"http://www.dhsb.org/index.phtml?d=201435"];
    NSLog(@"Loaded Timetable");
    NSError *loaderror;
    NSString *page = [NSString stringWithContentsOfURL:requestTimetableURL 
                                              encoding:NSASCIIStringEncoding
                                                 error:&loaderror];

    [webView loadHTMLString:page baseURL:requestTimetableURL];

    NSString* Period1;

    NSScanner *htmlScanner =  [NSScanner scannerWithString:page];

    [htmlScanner scanUpToString:Period1String intoString:NULL];
    [htmlScanner scanString:Period1String intoString:NULL];
    [htmlScanner scanUpToString:@"</FONT>" intoString:&Period1];

    period1label.text= Period1;

    NSLog(@"Collected Period 1 Data: %@", Period1);

    NSScanner *htmlScanner2 =  [NSScanner scannerWithString:page];

    NSString* Period2;

    [htmlScanner2 scanUpToString:Period2String intoString:NULL];
    [htmlScanner2 scanString:Period2String intoString:NULL];
    [htmlScanner2 scanUpToString:@"</FONT>" intoString:&Period2];

    period2label.text= Period2;

    NSLog(@"Collected Period 2 Data: %@", Period2);

    NSScanner *htmlScanner3 =  [NSScanner scannerWithString:page];

    NSString* Period3;

    [htmlScanner3 scanUpToString:Period3String intoString:NULL];
    [htmlScanner3 scanString:Period3String intoString:NULL];
    [htmlScanner3 scanUpToString:@"</FONT>" intoString:&Period3];

    period3label.text= Period3;

    NSLog(@"Collected Period 3 Data: %@", Period3);

    NSScanner *htmlScanner4 =  [NSScanner scannerWithString:page];

    NSString* Period4;

    [htmlScanner4 scanUpToString:Period4String intoString:NULL];
    [htmlScanner4 scanString:Period4String intoString:NULL];
    [htmlScanner4 scanUpToString:@"</FONT>" intoString:&Period4];

    period4label.text= Period4;

    NSLog(@"Collected Period 4 Data: %@", Period4);

    NSScanner *htmlScanner5 =  [NSScanner scannerWithString:page];

    NSString* Period5;

    [htmlScanner5 scanUpToString:Period5String intoString:NULL];
    [htmlScanner5 scanString:Period5String intoString:NULL];
    [htmlScanner5 scanUpToString:@"</FONT>" intoString:&Period5];

    period5label.text = Period5;

    NSLog(@"Collected Period 5 Data: %@", Period5);

但是，当按下按钮以使所有这一切发生时，它就是所有字符串（null）。每个文本文件应该完全正常工作，因为他们已经为我的应用程序的其他部分工作。

我应该采用更好的方法吗？或者我可以改进当前的方法来获得我想要的结果吗？

由于

Answer 1

 NSString *Period1String = [[NSBundle mainBundle] pathForResource: @"Period1String" ofType: @"txt"];

这是将Period1String设置为Period1String.txt的路径，而不是Period1String.txt的内容。

应该是

 NSString *Period1String = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource: @"Period1String" ofType: @"txt"] usedEncoding:nil error:nil];

根据需要替换编码和错误的值。

为什么我的NSString没有读取我的.txt文件？

1 个答案: