whats different between isKindOfClass and isMemberOfClass?

我试过两个xcode,看起来效果一样吗？

在JSON解析期间(使用AFNetwork json getter完成),我有这段代码:

if (![[data class] isKindOfClass:[NSDictionary class]]) {
    DLog(@"%@ was not kind of class NSDictionary",[data class]);
    return;
}

但由于某些原因,If句子变为真,函数返回:

> __NSCFDictionary was not kind of class NSDictionary

但是不应该__NSCFDictionary是专门的一类NSDictionary？或者如果这是错误的验证方式,我该怎么做？

更新:

我尝试过它,就像这样:

        if (![[NSDictionary class] isKindOfClass:[data class]]) {
            DLog(@"%@ was not kind of class NSDictionary",[data class]);
            return;
        }

仍然不起作用:

__NSCFDictionary不是类NSDictionary