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KexAri
KexAri

Reputation: 3977

Swift and overriding the init method for a custom class

brand new to Swift here coming from Objective-C, created a basic class like so:

class Person {

    var name: String
    var age: Int

    init(){

        name = “Bob”
        age = 30
    }

    func printInfo(){

        print(name)
        print(age)
    }

}

Why is it okay just to use init() here? I thought I would need to use override func init(). Also do I need to call the super or anything?

Upvotes: 1

Views: 1220

Answers (2)

Midhun MP
Midhun MP

Reputation: 107131

It is because you are not inheriting from any class and Person class is the base class, means it doesn't have any super class. (Note that you can't call super.init() from the init method of Person class)

If your class is inherited from any class, you need to override the init method and need to call super.init()

Like:

class Person : NSObject
{

    var name: String
    var age: Int

    override init()
    {    
        name = "Bob"
        age = 30
    }

    func printInfo()
    {    
        print(name)
        print(age)
    }
}

Upvotes: 1

Steffen D. Sommer
Steffen D. Sommer

Reputation: 2926

From the Apple documentation:

Swift classes do not inherit from a universal base class. Classes you define without specifying a superclass automatically become base classes for you to build upon.

So basically you're not inherting from any class and thus not overriding any init method. If you're inheriting from a class, say NSObject, then yes then you would probably want to call the super class' initialiser (as you would do in Objective-C).

Upvotes: 2

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