如何在iphone的objective-C中从NSMutableString中断或生成nsmutablesubstring?

NSArray *myArray = [string componentsSeparatedByString:@","];
NSString * strippedNumbers = [[myArray objectAtIndex:4] stringByReplacingOccurrencesOfRegex:@"[^0-9]" withString:@""];
NSString *myString = [NSString stringWithFormat:@"%@ %@", [myArray objectAtIndex:3], strippedNumbers];

如果这是CSV数据,请检查

http://www.macresearch.org/cocoa-scientists-part-xxvi-parsing-csv-data

一种方法是在逗号处拆分字符串并修剪空白:

NSArray *substrings = [myString componentsSeparatedByString: @","];
NSCharacterSet *whitespace = [NSCharacterSet whitespaceCharacterSet];
NSMutableArray *result = [NSMutableArray array];
for ( NSString *str in substrings )
    [result addObject: [str stringByTrimmingCharactersInSet: whitespace]];