Question

我正在尝试解析一个JSON字符串，但它出现了SIGABRT错误。

我正在使用的代码：

NSString *test = @'{"notifications":[{"id":"fae9a890-2791-46e2-ad9c-5a72f602a2e8","created":"2017-06-17T21:57:28+00:00","thread_id":3964,"reply_id":null,"thread":{"id":3964,"subject":"[CakePHP] Pagination"},"users_from":{"username":"Royal"},"content":"has posted a reply in"},{"id":"00732627-f23e-423e-b885-add968575972","created":"2017-06-17T20:08:05+00:00","thread_id":3964,"reply_id":79478,"thread":{"id":3964,"subject":"[CakePHP] Pagination"},"users_from":{"username":"Royal"},"content":"has quoted you in"}]}';

 NSError *error;
        NSMutableDictionary *allCourses = [NSJSONSerialization JSONObjectWithData:test
                                                                          options:kNilOptions
                                                                            error:&error];
        if( error )
        {
            NSLog(@"%@", [error localizedDescription]);
        }
        else {
            NSArray *monday = allCourses[@"notifications"];
            for ( NSDictionary *theCourse in monday )
            {
                NSLog(@"----");
                NSLog(@"Title: %@", theCourse[@"subject"] );
                NSLog(@"Id: %@", theCourse[@"id"] );
                NSLog(@"----");
            }
        }

感谢。

Answer 1

错误在你的NSString声明中：

 for toppings in self.toppings {
            if self.selectedDrink.name == "Tea" {
                if toppings.limit == "C" {
                    self.toppings.remove(at: toppings)
                }
            }
        }

这是错误的。

NSString必须始终使用以下格式：@＆＃34; bla bla bla＆＃34;。

您需要在测试字符串中加入双引号的转义符，如此

SELECT m.*
FROM (SELECT m.*,
             (@rn := if(@a = a.id, @rn + 1,
                        if(@a := a.id, 1, 1)
                       )
             ) as rn
      FROM tags t JOIN
           artists a 
           ON t.artist_id = a.id JOIN
           mp3s m 
           ON m.id = t.mp3_id CROSS JOIN
           (SELECT @a := -1, @rn := 0) params
      WHERE . . .
      ORDER BY a.id, m.date DESC
     ) m
WHERE rn <= 3;

尝试解析JSON时的SIGABRT

1 个答案: