学步园

NSString* headerData=***;
headerData = [headerData stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];  //去除掉首尾的空白字符和换行字符
       headerData = [headerData stringByReplacingOccurrencesOfString:@"\r" withString:@""];
       headerData = [headerData stringByReplacingOccurrencesOfString:@"\n" withString:@""];
如此即可。