我有一个NSDictionary
与四个对象。每个对象是包含数千个对象的NSDictionary
。我通过记录顶级字典的描述来验证它包含它应该是什么。但是,当我运行下面的代码时,要枚举该顶级字典中的对象,调试器显示一个错误,指示返回的对象是sting而不是字典。快速枚举NSDictionary持有NSDictionary对象
下面是代码:
for(id synsetsForPos in dictionaryOfSynsetDictionaries) {
NSLog(@"synsetsForPos is class of %@ with description %@", [synsetsForPos class], [synsetsForPos description]);
(我原来录入synsetsForPos
作为NSDictionary
,但这里所描述的结果都是一样的。)
在调试器中,我在日志语句停止得到这在控制台:
(lldb) po [synsetsForPos class]
(id) $2 = 0x016e2c8c __NSCFConstantString
(lldb) po [[dictionaryOfSynsetDictionaries objectForKey:@"n"] class]
(id) $3 = 0x016d3e0c __NSCFDictionary
(lldb) po [[dictionaryOfSynsetDictionaries objectForKey:@"r"] class]
(id) $6 = 0x016d3e0c __NSCFDictionary
(lldb) po [[dictionaryOfSynsetDictionaries objectForKey:@"v"] class]
(id) $7 = 0x016d3e0c __NSCFDictionary
(lldb) po [[dictionaryOfSynsetDictionaries objectForKey:@"a"] class]
(id) $8 = 0x016d3e0c __NSCFDictionary
(lldb) po [dictionaryOfSynsetDictionaries allKeys]
(id) $10 = 0x653662a0 <__NSArrayI 0x653662a0>(
r,
n,
v,
a
)
然后,让日志语句执行,我得到这个:
2012-11-24 22:32:41.069 [6037:fb03] synsetsForPos is class of __NSCFConstantString with description r
(lldb)
后跟此错误消息:
2012-11-24 22:41:21.287 [6037:fb03] -[__NSCFConstantString countByEnumeratingWithState:objects:count:]: unrecognized selector sent to instance 0x1faf8
我不明白是怎么回事,这是为什么不被视为在快速枚举代码字典。
+1你的回答在同一时间Jrturton的走了进来。 – Jim