Question

I’ve recently reread the interesting tutorial from Mike Ash about How to create classes at Objective-C Runtime

I has been a long time I am wondering where to apply this powerful feature of the language. I always see an overkill solution to most of the ideas that come to my mind, and I eventually proceed with NSDictionary. What are your cases of use of creating classes at runtime? The only one I see is an Obj-C interpreter… More ideas?

Answer 1

There’s some possible options I see, when someone need to create class in runtime

• To hide information about it (It won’t help in most cases, but… you can)
• To perform multiple-inheritance (If you really need it 🙂
• Using your own language(i.e. some XML-like), that can be interpreted by your program, writted in Obj-C (Something like NSProxy, but even better.)
• Creating some Dynamic-Class that can change it’s behavior in runtime

In general.. There is some possible usages of this. But in real world, in default service applications there’s no need to do this, actually:)