StaticExample.swift

// Our Original class
class Example {

    // Original function
    static func start() {
        print("Start")
    }
}

// Subclassing
class ExampleSubclass: Example {

    // Throw an error "Cannot override static method"
    override static func start() {
        print("Overridden Start")
    }
}

Example.start() // This will print "Start" in the console.
ExampleSubclass.start() // Compiler error - Ambiguous use of 'start()'.