協(xié)議
import UIKit
protocol Breathable {
var isBreathing:Bool {get set}
var isLiving:Bool {get}
}
struct human:Breathable {
// var isLiving: Bool = true
// var isBreathing: Bool = true
var isBreathing: Bool {
get{return true}
set{}
}
var isLiving: Bool {
get{return true}
set{}
}
}
protocol superman :People {
var canFly: Bool {get set}
func punch()
}
struct AngleLisa:superman {
var name: String = "Lisa"
var race: String = "Asian"
func sayHi() {
print("hi~ i'm\(name)")
}
var canFly: Bool = true
func punch() {
print("哈哈哈")
}
}
protocol People {
var name:String {get set}
var race:String {get set}
func sayHi()
}
//一旦遵循了協(xié)議 就要實(shí)現(xiàn)里面的方法和變量
struct Lisa:People {
var name:String = "lisa"
var race: String = "Asian"
func sayHi() {
print("hi~ i'm\(name)")
}
}
class lili: People {
var name:String = "lili"
var race: String = "Asian"
func sayHi() {
print("hi~ i'm\(name)")
}
}
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
}
協(xié)議擴(kuò)展
import UIKit
protocol iOSGenius {
func point()
}
struct iOSLisa : iOSGenius {
func point() {
print("lisaa")
}
}
class iOSDev: iOSGenius {
}
extension iOSGenius {
func point() {
print("lisa iss ")
}
}
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let dev = iOSDev()
dev.point()
}
}
