iphone - 如何在 Objective C 中从 NSString 中拆分换行符

Question

对于我的新项目。我已将我的 csv 文件内容加载为 NSString。首先，我需要用换行符分隔它，然后用逗号分隔每一行。我怎么能循环这一切？你能帮帮我吗？

CSV 内容

"^GSPC",1403.36,"4/27/2012","4:32pm",+3.38,1400.19,1406.64,1397.31,574422720 "^IXIC",3069.20,"4/27/2012","下午 5:30",+18.59,3060.34,3076.44,3043.30,0

ViewController.m

NSString* pathToFile = [[NSBundle mainBundle] pathForResource: @"quotes" ofType: @"csv"];
NSString *fileString = [NSString stringWithContentsOfFile:pathToFile encoding:NSUTF8StringEncoding error:nil];
if (!fileString) {
    NSLog(@"Error reading file.");
}

NSArray *array = [fileString componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]];

for(int i=0; i<[array count]; i++){      
    //
}

Answer 1

可能需要查看 NSMutableArray。

// grab your file
NSMutableArray *data = [[fileString componentsSeparatedByCharactersInSet: [NSCharacterSet newlineCharacterSet]] mutableCopy];
for (int i = 0; i < [data count]; i++)
{
    [data replaceObjectAtIndex: i
                    withObject: [[data objectAtIndex: i] componentsSeparatedByString: @","]];
}

相关地，Dave DeLong 有一个合适的库来满足这个需求:https://github.com/davedelong/CHCSVParser