CODEWITHSUNDEEP
iosswiftclassinheritance
Hugo Fouquet
Hugo Fouquet

Reputation: 149

Swift Error in inheritance init class

I have an error when un want init my B object.

My error is : Use of 'self' in property access 'name' before super.init initializes self

class A {
    let name = "myName";
}

class B:A {
    let point: ObjectWithName;

    init() {
        self.point = ObjectWithName(name); // error here
        super.init();
    }
}

Thanks for your help !

Upvotes: 2

Views: 216

Answers (1)

Luca Angeletti
Luca Angeletti

Reputation: 59536

The problem is that you are accessing name which is declared in the superclass. But the superclass has not been initialized yet (it will after super.init()).

So it's a logic problem.

Solution #1

You can declare point as lazy, this way it will be executed after the whole init process has been completed, unless you call it before.

struct ObjectWithName {
    let name: String
}

class A {
    let name = "myName";
}

class B: A {
    lazy var point: ObjectWithName = { ObjectWithName(name:self.name) }()
}

Solution #2

Inside A you can define name as static

class A {
    static let name = "myName";
}

class B:A {
    let point: ObjectWithName;

    override init() {
        self.point = ObjectWithName(name: B.name)
        super.init();
    }
}

Upvotes: 1

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