objective-c - 是否可以在键下设置 NSMutableDictionary 键？

Question

我设置了value一个key这样的：

[mutableDict setObject:@"Object to set" forKey:@"KeyOne"];

这可行，但现在我想添加一个valueunder "Key one"，如下所示：

[mutableDict setObject:@"Object a" forKey:@"KeyOne/detailsOnKey"];

这甚至可能吗？感谢所有帮助

Answer 1

听起来你想在你的字典里放一本字典，dawg

mutableDict[@"KeyOne"] = @{@"detailsOnKey": @"Object"}

然后你可以像这样访问嵌套的字典：

mutableDict[@"KeyOne"][@"detailsOnKey"]

Answer 2

您可以为此使用多个字典。

//add a dictionary as the object for KeyOne
[mutableDict setObject:[[NSMutableDictionary alloc] init] forKey:@"KeyOne"];

//add "Object a" under key one
[(NSMutableDictionary *)[mutableDict objectForKey:@"KeyOne"] setObject:@"Object a" forKey:@"detailsOnKey"];

//如何取回keyone/detailsonkey？，这样就可以取回

id objectA = [(NSMutableDictionary *)[mutableDict objectForKey:@"KeyOne"] objectForKey:@"detailsOnKey"];