objective c:读取一个csv文件

Question

我有这种类型的文件:

@firstTablel:1#one#two#three#four; 2#苹果#塔#花#机器人;

这是我的csv文件的一个例子......"firstTable"是我的表,1和2是我的两个项目的两个id.

我如何在目标c中读取此文件？你能帮助我吗？

Answer 1

Cocoa for Scientists有一篇关于阅读CSV文件的好文章:http://macresearch.org/cocoa-scientists-part-xxvi-parsing-csv-data

在你的情况下,你会做类似的事情:

NSString *fileString = [NSString stringWithContentsOfFile:pathToFile encoding:NSUTF8StringEncoding error:outError];
if (!fileString) {
    NSLog(@"Error reading file.");
}
NSScanner *scanner = [NSScanner scannerWithString:fileString];
[scanner setCharactersToBeSkipped:[NSCharacterSet characterSetWithCharactersInString:@"\n#; "]];

NSString *id = nil, *hashOne = nil, *hashTwo = nil, *hashThree = nil, *hashFour = nil;
while ([scanner scanUpToString:@"#" intoString:&id] && [scanner scanUpToString:@"#" intoString:&hashOne] && [scanner scanUpToString:@"#" intoString:&hashTwo] && [scanner scanUpToString:@"#" intoString:&hashThree] && [scanner scanUpToString:@";" intoString:&hashFour]) {
     // Process the values as needed.
     NSLog(@"id:%@, 1:%@, 2:%@, 3:%@:, 4:%@", id, hashOne, hashTwo, hashThree, hashFour);
}

在您提供的样本上,将打印:

2011-03-31 13:55:07.846 Stephen[39304:903] id:1, 1:one, 2:two, 3:three:, 4:four
2011-03-31 13:55:07.849 Stephen[39304:903] id:2, 1:apple, 2:tower, 3:flower:, 4:robot