Swift initializer is inaccessible due to private protection level

Question

I'm trying to create a singleton in Swift but I'm getting this error:

initializer is inaccessible due to private protection level

Here is my code (singleton class)

class mySingleton{

    private init() {    }
    static let sharedInstance = mySingleton()
    var numbers = 0

    func incrementNumberValue() {
        numbers += 1
    }
}

Here is where I'm calling the singleton:

override func viewDidLoad() {
    super.viewDidLoad()
    let single = mySingleton().sharedInstance
}

Here is the error:

Any of you know why or how I can fix this error?

Answer 1

Your line:

mySingleton().sharedInstance

has a typo. As written you are trying to create an instance of mySingleton and then call the sharedInstance method on the new instance. That's two mistakes.

What you actually want is:

mySingleton.sharedInstance

Now this calls the sharedInstance type constant on your mySingleton class.

BTW - it is expected that classnames begin with uppercase letters. Method and variable names should start with lowercase letters.