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With polymorphism, several descendant object/instance references can be assigned to a reference to the parent class, and yet the parent can exhibit the behavior of the descendant. In other words, you can declare a variable of a certain type (parent/UIControl) and it can store references of that type, but it can also store references to any child (subclass) of that type (here, UITextField, UISlider, UISegmentedControl, and UIStepper).

Home Page: http://iosbrain.com/blog/2017/03/07/polymorphism-in-swift-3-manipulate-multiple-related-controls-with-one-iboutlet-and-one-ibaction/

License: MIT License