Private setter "set()" in Swift

Swift private setter

Solution #1 using a public function

struct A {
    private var a: String
    
    public init(a: String) {
        self.a = a
    }
    
    func getA() -> String {
        return a
    }
}

let field = A(a:"a")
field.getA()

Solution #2 using private setter. In this case setter has a lower access level then geter

struct A {
    private(set) var a: String
    
    public init(a: String) {
        self.a = a
    }
}

let field = A(a:"a")
field.a

In the docs, in the first code sample under the heading "Getters and Setters" you can see that to have a private setter, the syntax looks like this :

private (set) var center: Point {...

Some clarification : private in Swift works a little differently - it limits access to property/method to the scope of a file. As long as there is more then one class in a file, they will be able to access all their contents. In order for private "to work", you need to have your classess in separate files.