Swift Tutorial - Tutorialspoint

AnyObject

To represent the instance of any class type, 'AnyObject' keyword is used.

class Subjects {

var physics: String

init(physics: String) {

self.physics = physics

}

}

class Chemistry: Subjects {

var equations: String

init(physics: String, equations: String) {

self.equations = equations

super.init(physics: physics)

}

}

class Maths: Subjects {

var formulae: String

init(physics: String, formulae: String) {

self.formulae = formulae

super.init(physics: physics)

}

}

let saprint: [AnyObject] = [Chemistry(physics: "solid physics", equations:

"Hertz"),

Maths(physics: "Fluid Dynamics", formulae: "Giga Hertz"),

Chemistry(physics: "Thermo physics", equations: "Decibels"),

Maths(physics: "Astro Physics", formulae: "MegaHertz"),

Maths(physics: "Differential Equations", formulae: "Cosine Series")]

let samplechem = Chemistry(physics: "solid physics", equations: "Hertz")

println("Instance physics is: \(samplechem.physics)")