我怎样才能传递一个“充满对象的 MutableArray"?通过使用 NSUserDefaults 到另一个类?

如何使用 NSUserDefaults 将MutableArray with full Objects"传递给另一个类?我知道如何传递MutableArray"，但这不起作用！

How can I pass a "MutableArray with full of Objects" to another class by using NSUserDefaults? I know how to pass "MutableArray"s but this does not work!

所以;

我有一个 MutableArray；'myCityObjects'，然后我用对象填充它；'城市'在每个 'cities' 对象中都有诸如 cityName、cityLocation 等属性...

I have a MutableArray; 'myCityObjects', and I populate it with objects; 'cities' In each 'cities' object there are properties like cityName, cityLocation etc...

[myCityObjects addObject:cities];

现在，我想要做的是使用'NSUserDefaults'将这个MutableArray(用对象填充)传递给另一个类；

Now, what I want to do is to pass this MutableArray (filled with objects) to another class by using 'NSUserDefaults';

[[NSUserDefaults standardUserDefaults] setObject: myCityObjects forKey:@"MCO"];

在另一个班级中，

NSMutableArray *getMyCityObjects = [[NSArray alloc] init];

getMyCityObjects = [[NSUserDefaults standardUserDefaults] mutableArrayValueForKey:@"MCO"];

但它不起作用！我无法在另一个类中获取 myCityObjects，getMyCityObjects"为空.我该如何解决?

But it doesn't work! I cannot get myCityObjects in the other class, "getMyCityObjects" is empty. How can I fix that?

谢谢，E.