https://nilliu.github.io/2016/08/16/swift3-getter-n-setter/
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import Cocoa class Human { // I specify that only the setter is private! private (set) var idNumber: String ////// USING GET/SET ///////////// private var _name : String public var name : String { get { print("Human, get name") return _name } set(newName) { print("Human, set name") _name = newName } } ////// DO THINGS BY HAND ///////////////// private var _age = 80 // getter public var age: UInt { print("get - \(#function) --> \(_age)") return UInt(_age) } public func setAge(newAge: UInt) -> Void { print("\(#function) --> \(newAge)") _age = Int(newAge) } ///////// INIT ///////////////// public init() { idNumber = String(describing: arc4random()) print("### \(#function) - Initiating \(NSStringFromClass(Human.self)) with identification number \(idNumber) ###") _name = "" } public func logStats() -> Void { print("\n\n=========== \(name) ================") print("idNumber is: \(idNumber)") print("age is: \(age)") print("============================================\n\n") } } |
Testing it
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var human1 = Human() human1.setAge(newAge: 8) human1.name = "Ricky Tsao" human1.logStats() |
Year 2080, Cyborgs
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class Cyborg: Human { private var _suitMaterial : String = "Metal" public var suitMaterial : String { get { print("Cyborg, get suitMaterial") return _suitMaterial } set(newSuitMaterial) { print("Cyborg, set suitMaterial") _suitMaterial = newSuitMaterial } } //over-riding parent property override var name: String { get { return super.name } set (cyborgName) { // over-ride super.name = cyborgName.appending("-cyborg T2000") } } /* // before and after of parent property manipuation override var name: String { willSet(newName) { print("Cyborg, willSet name") //print("Cyborg - WillSet name to \(newName) from \(name)") } didSet { print("Cyborg, didSet name") //print("Cyborg - didSet name to \(name)") } } */ } |
Testing it
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var cyborg1 = Cyborg() cyborg1.name = "Bionic Arm" cyborg1.logStats() |