Swift中的协议Protocol使用详情

本文介绍: 1.协议的语法自定义类型声明时,将协议名放在类型名的冒号之后来表示该类型采纳一个特定的协议.多个协议可以用逗号分开列出.若一个类拥有父类,将这个父类名放在其采纳的协议名之前,并用逗号分隔.//定义一个协议protocol So m ePro t o col{ }//So m eStruct ture遵守Som ePro tocol协议struct Som eStruc tture: Som eProtocol { }// Som eClas s 继承于Som eSuper class,并且


//定义一个协议
protocol SomeProtocol
{
    
}

//SomeStructture遵守SomeProtocol协议
struct SomeStructture: SomeProtocol {
    
}

// SomeClass继承于SomeSuperclass,并且还遵守SomeProtocol协议
class SomeClass: SomeSuperclass,SomeProtocol {
    
}

protocol SomeProtocol {
    
    var mustBeSettable: Int { get set }
    
    var doesNotNeedToBeSettable: Int {get}
    
    
}

protocol SomeProtocol {
    
   static  var mustBeSettable: Int { get set }
    
    var doesNotNeedToBeSettable: Int {get}
    
    
}

protocol SomeProtocol {
    
    init(someParameter:Int) 
}

protocol SomeProtocol {
    
    init(someParameter:Int)
}

class someClass: SomeProtocol {
    
    required init(someParameter: Int) {
        
    }
}

class someClass: SomeProtocol {
    
    required override init(someParameter: Int) {
        
    }
}

protocol SomeProtocol: AnyObject {
    
    init(someParameter:Int)
}

   let birthdayPerson = Person(name: "zhangSan", age: 13)
   wishHappyBirthday(to: birthdayPerson)


protocol Named {
    
    var name: String {get}
    
}

protocol Aged {
    
    var age: Int {get}
    
}

struct Person:Named,Aged{
    
    var name: String
    var age: Int
  
}

func wishHappyBirthday(to celebrator:Named&amp;Aged)
{
       print("Happy birthday,(celebrator.name),you are (celebrator.age)")

}

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