Swift2.0クラスの基礎知識

クラス#クラス#
クラス属性

//
//  SomeClass.swift
//  SwiftClass
//
//  Created by    on 15/6/17.
//  Copyright © 2015    . All rights reserved.
//

import Foundation
class SomeClass{
    //    
    var value1 = 1;
    var value2:Int = 2;
    //    
    var cal:Int{
        get{
            return value2
        }
        set(newValue){
            value2 = newValue
        }
    }
    //   ，       ，        
    class var newValue:Int{
        return 29;
    }
    
    var teachers:Int = 0 {
        //     
        willSet(newTeachers){
            print("     \(newTeachers)  ")
        }
        didSet(old) {
            if teachers > old {
                print("        \(teachers - old)    ")
            } else {
                print("        \(old - teachers)    ")
            }
        }
    }
}

//
//  main.swift
//  SwiftClass
//
//  Created by    on 15/6/17.
//  Copyright © 2015    . All rights reserved.
//

import Foundation

var someClass = SomeClass()
//      
print("      ")
print(someClass.value1)
print(someClass.value2)

//      
print("      ")
print(someClass.cal)
someClass.cal = 20
print(someClass.cal)

//     
print("     ")
print(SomeClass.newValue)

//       
print("       ")
someClass.teachers = 3

      
1
2
      
2
20
     
29
       
     3  
        3    
Program ended with exit code: 0

方法

//
//  ClassMethod.swift
//  SwiftClass
//
//  Created by    on 15/6/17.
//  Copyright © 2015    . All rights reserved.
//

import Foundation

class ClassMethod {
    var score = 0
    //    
    //       
    func additive(){
        score++
        print("\(score)
")
    }
    
    //      
    func subtraction(amount: Int){
        score -= amount
        print("\(score)
")
    }
    
    //   
    class func betterScore() {
        print("            
")
    }
    
    //                
    func printScore() {
        let score: Int = 50
        print("    ：\(score)")
        print("    ：\(self.score) 
")
    }
}

class NewClassMethod: ClassMethod {
    
    override class func betterScore() {
        print("  ，      
")
    }
    
    override func additive() {
        score += 3
        print("  ，       
")
    }
}

//
//  main.swift
//  SwiftClass
//
//  Created by    on 15/6/17.
//  Copyright © 2015    . All rights reserved.
//

import Foundation

var classMethod = ClassMethod()

//      
//      
print("      ")
classMethod.additive()

//      
print("      ")
classMethod.subtraction(10)

//     
print("     ")
ClassMethod.betterScore()

//                
print("                ")
classMethod.printScore()

//        
var newClassMethod = NewClassMethod()
//        
print("        ")
newClassMethod.subtraction(20)

//          
print("          ")
newClassMethod.additive()

//        
print("        ")
NewClassMethod.betterScore()

      
1

      
-9

     
            

                
    ：50
    ：-9 

        
-20

          
  ，       

        
  ，      

Program ended with exit code: 0

下付きスクリプト

//
//  ClassSubScript.swift
//  SwiftClass
//
//  Created by    on 15/6/18.
//  Copyright © 2015    . All rights reserved.
//

import Foundation

class Experience {
    
    var age:[Int] = Array(count: 5, repeatedValue: 0)
    //    
    subscript(index:Int) -> Int {
        //  
        get{
            return age[index]
        }
        //  
        set{
            age[index] = newValue
        }
    }
    
    
}

import Foundation

var ex = Experience()

ex[0] = 5
ex[1] = 6

print(ex[0])
print(ex[1])

5
6
Program ended with exit code: 0