CODEWITHSUNDEEP
swiftinitialization
Barney Cowell
Barney Cowell

Reputation: 103

Cannot convert value of type 'CFTimeInterval.Type' to 'CFTimeInterval'?

I'm going over a programming example in a book on Swift and have an initializer to an SKScene that looks like this:

class GameOverScene: SKScene
{
    init(size:CGSize,won:Bool,time:CFTimeInterval)
    {
       ...........
    }
}

This initializer is then called in another part of the program with the following line:

let gameOverScene=GameOverScene(size:self.size,won:true,time:CFTimeInterval)

It seems that this should all be fairly simple but then I get this strange looking error that says:

Cannot convert value of type 'CFTimeInterval.Type (aka 'Double.Type') to expected argument type 'CFTimeInterval' (aka 'Double').

Does anyone know (1) what this error means and (2) how to correct it?

Upvotes: 0

Views: 414

Answers (1)

Alexander
Alexander

Reputation: 63271

CFTimeInterval is a type. It's not an instance of CFTimeInterval that you can pass into that function.

CFTimeInterval is a typealias to Double. So this function expects a value of type Double. 1.0, NaN, -1.5, Double.pi are all valid instances of Double. But what you're trying to give it is CFTimeInterval, which refers to the type itself.

This, for example, would work:

let gameOverScene = GameOverScene(size: self.size, won: true, time: 1.23)

Upvotes: 2

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