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