init skshape node inside a specific class

Asked Nov 06 '17 at 17:27

Active Nov 06 '17 at 17:27

Viewed 39 times

I create a class of kind SKShapeNode. in the class I create a ball var that implements some properties. one of the properties that I need is 'circleOfRadius' so the ball will get a specific size. I look at the question and the answer here: here but I don't really get it. here is my code:

class BallNode: SKShapeNode{

    var lastPosition: CGPoint?

    init(circleOfRadius: CGFloat){
        super.init()
        let radius = 25
        self.init(circleOfRadius: radius)
    }
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

no matter what I try I get an error. how can I init the ball size inside the class? thanks!

asked Nov 06 '17 at 17:27

omerc

What error do you get? – adamfowlerphoto Nov 06 '17 at 18:36
initializer cannot both delegate ('self.init') and chin to a superclass initializer (super.init) – omerc Nov 06 '17 at 19:27
Why are you calling self.init()? – adamfowlerphoto Nov 06 '17 at 19:34
Because I have to call the initializer 'circleOfRadius' – omerc Nov 06 '17 at 20:05
But you are calling it from within itself – adamfowlerphoto Nov 06 '17 at 20:07
are you sure about what you talking about? when I remove the self.init I get an error. believe me I tried all that stuff (and failed) and thats the reason why I post the question – omerc Nov 06 '17 at 20:22
I assume from your responses you have a radius variable in the class. I’ll assume you have called it circleOfRadius. If so you need to initialise it with self.circleOfRadius = circleOfRadius – adamfowlerphoto Nov 06 '17 at 20:26
Circleofradius is a intilaizer inside skshapenode class. I don’t really get your point here. You are not really helping... – omerc Nov 06 '17 at 20:39
You really need to post more code if you want someone to help. – adamfowlerphoto Nov 06 '17 at 20:44
learn about convenience inits vs designated inits – Knight0fDragon Nov 06 '17 at 20:46
https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Initialization.html – Knight0fDragon Nov 06 '17 at 20:48
I already read that and still not succeed. Can you help me with that"? – omerc Nov 06 '17 at 20:52
yeah, simply put, circleOfRadius in a convenience init, you can't override it. To have access to existing convenience inits, you have to override all designated inits. This does not mean you still have the ability to override the convenience init. Whatever you are doing, I would redo, and only override the designated inits – Knight0fDragon Nov 06 '17 at 21:34
BTW, calling init twice does not make sense, it is like starting your car when your car is already started. – Knight0fDragon Nov 06 '17 at 21:35

init skshape node inside a specific class

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