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iOS Object-Oriented Swift Classes and Objects Classes and Their Methods

Posted by Aristotle M
Aristotle M
1,537 Points

Task 1 of Classes

Need help! My code doesn't compile?

Button.swift 
class Button {
    var width: Double
    var height: Double
    var points: Double

    init(width:Double, height:Double, points:Double){
        self.width = width
        self.height = height
        self.points = points
    }

    func incrementBy(points: Double)
    {
        width = points + width
        height = points + width
    }
}

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hiya,

You don't need to declare points as a member variable and it doesn't need to be included in your init method. It isn't part of the class, necessarily.

Delete the references to it in those two places. The points variable is just something that the method incrementBy uses to perform its task. Your implementation of that is fine, but I'd use the following myself:

    func incrementBy(points: Double)
    {
        self.width += points
        self.height += points
    }

I hope that all makes sense.

Steve.