iphone - valueForKey 只返回内存地址而不返回实际值

Question

    NSDictionary *topic = [spaces objectAtIndex:i];
    NSInteger topicid = [topic valueForKey:@"TOPICID"];

当我运行它并打印出主题时，我得到以下信息:

Printing description of topic:
<CFDictionary 0xdb2a70 [0x30307a00]>{type = mutable, count = 2, capacity = 12, pairs = (
    10 : <CFString 0xdb5300 [0x30307a00]>{contents = "TOPICID"} = 29
    12 : <CFString 0xdb53a0 [0x30307a00]>{contents = "TOPICNAME"} = <CFString 0xdb5360 [0x30307a00]>{contents = "zzzzzzzz"}
)}

但是，当我查看topicid时，其值始终是一个内存地址。我做错了什么？

Answer 1

也许这个值实际上是一个 NSNumber。你会得到这个使用:

NSInteger topicid = [[topic objectForKey:@"TOPICID"] intValue];