将项添加到不显示字符的字符串

Question

    for (NSString *item in items) {
        NSString *ref = [item stringByMatching:myregex1 capture:2];
        NSString *value = [item stringByMatching:myregex1 capture:3];
        NSLog(@"%@ : %@", ref, value);
        AllOrderItems = [AllOrderItems stringByAppendingFormat:(@"%@: %@ \r\n", ref, value)];       

    }

AllOrderItems没有显示：或者新行（\ r \ n）只显示参考号和＆amp;值字符串？

请帮忙

由于

Answer 1

删除格式周围的括号：

AllOrderItems = [AllOrderItems stringByAppendingFormat:@"%@: %@ \r\n", ref, value];