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文件的一个示例...“firstTable”是我的表，1和2是我的两个项目的两个id。

如何在目标c中读取此文件？你能救我吗？

Answer 1

Cocoa for Scientists在阅读CSV文件方面发表了很好的帖子：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

objective c：读取一个csv文件

1 个答案: