Hi there!
the Swift book says:
> Extensions in Swift can:
>
> • Add computed instance properties and computed type properties
> • Define instance methods and type methods
> • Provide new initializers
> • Define subscripts
> • Define and use new nested types
> • Make an existing type conform to a protocol
>
> NOTE
> Extensions can add new functionality to a type, but they cannot override
> existing functionality.
However, in practice we can override methods in class extensions:
class ViewController: UIViewController {}
extension ViewController {
override func viewDidLoad() {}
}
This seems to be incompatible with what the book claims:
> … cannot override existing functionality ...
So, my questions are:
• Why are overrides allowed in class extensions?
• Am I reading the book wrong? :)
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