Swift 简单继承和动态扩展
发布时间:2020-12-14 02:23:09 所属栏目:百科 来源:网络整理
导读://Swift 简单继承和动态扩展class Hello { var _name: String? = "Swift" init(name: String) { _name = name } init() { } func sayHello() { println("Hello (_name)") } class func sayHi(){ println("Hi") }}class Hi: Hello { override func sayHello(
//Swift 简单继承和动态扩展 class Hello { var _name: String? = "Swift" init(name: String) { _name = name } init() { } func sayHello() { println("Hello (_name)") } class func sayHi(){ println("Hi") } } class Hi: Hello { override func sayHello() { super.sayHello() println("Hi (_name)") } } //动态扩展方法 extension Hi { func sayHaha() { println("Hana") } } var hi = Hi() hi.sayHello() hi.sayHaha() //也可以为自定义类起别名 typealias Hii = Hi var hii = Hii() hii.sayHaha() (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |