obj-c问题设置数组与componentsSeparatedByString

Question

我有一个大约 2000 行的数据源，如下所示：

6712,Anaktuvuk Pass Airport,Anaktuvuk Pass,United States,AKP,PAKP,68.1336,-151.743,2103,-9,A

我感兴趣的是第 6 个这个字符串的部分，所以我想把它变成一个数组，然后我想检查第 6 部分 [5] 是否出现该字符串“PAKP”

代码：

NSBundle *bundle = [NSBundle mainBundle];
    NSString *airportsPath = [bundle pathForResource:@"airports" ofType:@"dat"];
    NSData *data = [NSData dataWithContentsOfFile:airportsPath];

    NSString *dataString = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];

NSArray *dataArray = [dataString componentsSeparatedByString:@"\n"];
    NSRange locationOfAirport;
    NSString *workingString = [[NSString alloc]initWithFormat:@""];
    NSString *searchedAirport = [[NSString alloc]initWithFormat:@""];
    NSString *airportData = [[NSString alloc]initWithFormat:@""];

    int d;

    for (d=0; d < [dataArray count]; d=d+1) {
        workingString = [dataArray objectAtIndex:d];
            testTextBox = workingString; //works correctly
        NSArray *workingArray = [workingString componentsSeparatedByString:@","];
            testTextBox2 = [workingArray objectAtIndex: 0]; //correctly displays the first section "6712"
            testTextBox3 = [workingArray objectAtIndex:1] //throws exception index beyond bounds
        locationOfAirport = [[workingArray objectAtIndex:5] rangeOfString:@"PAKP"];


    }

问题是，当工作数组填充时，它只填充一个单个对象（字符串的第一个组成部分是“6712”。如果我让它显示工作字符串，它会正确显示整个字符串，但由于某种原因，它不能正确使用逗号创建数组。

我尝试过不使用数据文件并且工作正常，所以问题来自于我如何导入数据的

想法？

Answer 1

你的代码有效。您应该使用调试器运行它以查看发生了什么。据猜测，您的输入数据并不是您想象的那样 - 可能是不同的编码或不同的行结尾。

参见示例：

NSString *dataString = @"6712,Anaktuvuk Pass Airport,Anaktuvuk Pass,United States,AKP,PAKP,68.1336,-151.743,2103,-9,A";
NSArray *dataArray = [dataString componentsSeparatedByString:@"\n"];
for (NSString *workingString in dataArray) {
    NSString *testTextBox = workingString; //works correctly
NSArray *workingArray = [workingString componentsSeparatedByString:@","];
    NSString *testTextBox2 = [workingArray objectAtIndex: 0]; //correctly displays the first section "6712"
    NSString *testTextBox3 = [workingArray objectAtIndex:1]; //throws exception index beyond bounds
NSRange locationOfAirport = [[workingArray objectAtIndex:5] rangeOfString:@"PAKP"];
}

Answer 2

数据中存在问题，其中有几个“\”导致了错误。