从 NSDictionary 检索字符串时出现问题

Question

嘿伙计们，我有这段代码：

SJLog(@"dict: %@",dict);

打印这本字典：

2011-05-04 02:37:51.537 Parking[14458:207] dict: {
    "A_SPACES" = 0;
    "DP_SPACES" = 7;
    "LOT_DESC" = "West of the Maddy Lab off of West Health Science Dr.";
    "LOT_ID" = 44;
    "LOT_NAME" = LOT57;
    "L_SPACES" = 0;
    "MC_SPACES" = 8;
    "VISITOR_SPACES" = 263;
    "permits_accepted" =     {
        A = 1;
        C = 1;
        L = 0;
    };
}

我试图通过以下代码检索 LOT_DESC 的值：

SJLog(@"lot description from dict: %@ ",[dict objectForKey:@"@LOT_DESC"]);

但我得到了这个：

2011-05-04 02:37:51.537 Parking[14458:207] lot description from dict: (null)

如果我使用 [dict valueForKey:@"@LOT_DESC" ] 我收到以下错误：

2011-05-04 02:44:28.148 Parking[14505:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<__NSCFDictionary 0x58c8660> valueForUndefinedKey:]: this class is not key value coding-compliant for the key LOT_DESC.'

通过 valueForKey 访问字典以获取所有数值都可以正常工作。所以，我不知道出了什么问题，并且真的很想得到一些建议。提前致谢！

Answer 1

试试这个

SJLog(@"lot description from dict: %@ ",[dict objectForKey:@"LOT_DESC"]);