Question

对于我的新项目。我已将我的csv文件内容加载为NSString。首先，我需要通过换行拆分它，然后用逗号分隔每一行。我怎么能循环这一切？你能帮我吗？

CSV内容

“^ GSPC”，1403.36，“4/27/2012”，“4:32 pm”，+ 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

可能希望了解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有一个适当的库来满足这种需求：https://github.com/davedelong/CHCSVParser

如何在Objective C中从NSString中拆分换行符

1 个答案: