How do I implement a custom delegate to a class in iOS?

How do I implement a custom delegate to a class in iOS?

There’s basically three steps:

1. Define a delegate protocol:

   protocol MyDelegate : AnyObject {
       func someMethod()
   }

   .

2. Define a delegate property in your class:

   class MyClass {
       weak var delegate: MyDelegate? = nil
   }

   .

3. Call that delegate:

   self.delegate?.someMethod()

   .

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