Objective-C HashMap等价 [英] Objective-C HashMap equivalent

问题描述

 
我试图转换一段Java代码，该代码使用一个包含对象和值作为对象的HashMap。 code> private static HashMap< Class< ;? extends Component>，ComponentType> componentTypes = new HashMap< Class< ;? extends Component>，ComponentType>（）; 
  

我一直在阅读如何做到这一点Obj-C，但我没有成功，大多数人建议使用NSDictionary，问题是，他们的键需​​要是字符串，我需要他们作为对象。另一个选项是NSMapTable，但它不适用于iOS。

感谢，

解决方案

NSDictionary 的键不需要是字符串。它们可以是实现 NSCopying 的任何对象。但是，如果对象是自定义对象，则它需要对 -hash 和 -isEqual：消息，但这与在Java集合中使用对象相同，因此它不应该是一个挑战。

I am trying to convert a piece of Java code which uses a HashMap that contains as a key an object and a value as an object.

private static HashMap<Class<? extends Component>, ComponentType> componentTypes = new HashMap<Class<? extends Component>, ComponentType>();

I've been reading on how to do this with Obj-C but I have not been successful, most people suggest using a NSDictionary, the problem is that they keys need to be strings and I need them as objects. The other option was NSMapTable, however it is not available on iOS. Would someone be able to assist on how I can convert this into an obj-c equivalent?

thanks,

解决方案

The keys for an NSDictionary do not need to be strings. They can be any object that implements NSCopying. If the object is a custom object, however, it needs to produce sane responses to the -hash and -isEqual: messages, but this is the same as using an object in a Java collection so it shouldn't be much of a challenge.

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