Access Levels

fileprivate
ViewController.swift

internal
デフォルト
青いアイコン

public
複数のモジュール
AppModuleとPodModuleはどちらでもご利用いただけます

Podについては、他の開発者も追加して使用する必要があるため、公開されていることが確認できます.
サブクラスおよび書き換え不可

実習

import Foundation

let aClass = AClass()

aClass.methodA()
aClass.methodB()

print(aClass.anInternalProperty)    // Possible

import Foundation

class AClass {
    
    //Global variables, also called class properties.
    
    //같은 클래스
    private var aPrivateProperty = "private property"
    
    //같은 파일
    fileprivate var aFilePrivateProperty = "fileprivate property"
    
    var anInternalProperty = "internal property"
    
    func methodA () {
        
        var aLocalVariable = "local variable"
        
        //Step 1. Try to print aLocalVariable Here - Possible
        print("\(aLocalVariable) printed from methodA in AClass")
        
        //Step 3. Try to print aPrivateProperty Here - Possible
        print("\(aPrivateProperty) printed from methodA in AClass")
        
        //Step 6. Try to print aFilePrivateProperty Here - Possible
        print("\(aFilePrivateProperty) printed from methodA in AClass")
        
        //Step 9. Try to print anInternalProperty Here - Possible
        print("\(anInternalProperty) printed from methodA in AClass")
    }
    
    func methodB () {
        
        //Step 2. Try to print aLocalVariable Here - Impossible
        //print("\(aLocalVariable) printed from methodB in AClass")
        
        //Step 4. Try to print aPrivateProperty Here - Possible
        print("\(aPrivateProperty) printed from methodB in AClass")
        
        print("\(aFilePrivateProperty) printed from methodB in AClass") // Possible
        
        print("\(anInternalProperty) printed from methodB in AClass") // Possible
    }
    
}

class AnotherClassInTheSameFile {
    
    init() {
        
        //Step 5. Try to print aPrivateProperty Here - Impossible
        //print(aClass.aPrivateProperty)
        
        //Step 7. Try to print aFilePrivateProperty Here - Possible
        print(aClass.aFilePrivateProperty)
    }
}

import Foundation

class AnotherClassInAnotherFile {
    
    init() {
        
        //Step 8. Try to print aFilePrivateProperty Here - Impossible
        //print(aClass.aFilePrivateProperty)
        
        //Step 10. Try to print anInternalProperty Here - Possible
        print(aClass.anInternalProperty)
    }
    
}