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objective-cswiftinheritancemultiple-inheritance

Does Objective C & Swift support Hierarchical inheritance?

I know that Objective-C and Swift support multi-level inheritance. But do they support hierarchical inheritance too or is it that any language that supports multi-level inheritance supports hierarchical by default?

Solution

  • Yes, both languages support hierarchical inheritance. There are countless examples in the iOS SDK.

    UIResponder is subclassed by UIApplication, UIView, UIViewController.

    UIView obviously has many subclasses as does UIViewController.