At its core, the Bridge pattern involves creating a protocol that defines the contract for an object. This contract is then implemented by a concrete class that provides the actual implementation of the object's functionality.
One of the key advantages of using the Bridge pattern is that it allows you to easily change the implementation of an object without affecting its underlying abstraction. This can be particularly useful when you need to swap out one implementation for another, or when you need to update the implementation of an object without affecting its abstraction.
For example, let's say you have a GUI application that uses a variety of different buttons. You could create an abstract Button class that defines the protocol for a button, and then create concrete classes for each type of button (e.g. RoundButton, SquareButton, etc.) that implement the Button protocol. This would allow you to easily change the implementation of your buttons without affecting their underlying abstraction.
Here is an example of how to implement the Bridge pattern in Swift. First, we create an abstract Button class that defines the functionality for a button: