java 如何像Java一样在objective-c中实现嵌套类？
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How to implement nested classes in objective-c like Java?
提问by graffiti
I need to implement nested classes. How do I write it in objective-c?
For example, I have such code:
我需要实现嵌套类。我如何在objective-c中编写它？
例如，我有这样的代码：
public class A {
private int a;
private B b;
class B {
private int z;
public void f() {
a = 1;
}
}
public void fA() {
b.f();
}
}
How can I implement this code in objective-c??
我如何在objective-c中实现这段代码？？
回答by
You can't, as there aren't nested classes in Objective-C. Your Aclass could build the Bclass dynamically then register it with the runtime, but there doesn't seem much point as this isn't a natural idiom for the Objective-C language. Just create a normal class that isn't used outside your class.
你不能，因为在 Objective-C 中没有嵌套类。您的A类可以B动态构建类，然后将其注册到运行时，但似乎没有多大意义，因为这不是 Objective-C 语言的自然习语。只需创建一个不在班级外使用的普通班级。
回答by lreichold
From my understanding, Objective-C doesn't have inner classes.. Try these links where this question has been asked before:
根据我的理解，Objective-C 没有内部类。试试这些链接，之前已经问过这个问题：
How to access a variable from inner class
Private classes in Objective C
http://lists.apple.com/archives/objc-language/2004/Dec/msg00041.html
http://lists.apple.com/archives/objc-language/2004/Dec/msg00041.html
