CatNap -- Chapter 11, Challenge 2 solution missing?

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1

The included code for Chapter 11, Challenge 2 (changing fill-colors of the Hint arrow) doesn’t seem to make any changes to the appropriate file: HintNode.swift.

I’ve gotten it to work with my own coding, but I’d like to check my solution against the author’s recommendation. Am I looking in the wrong place for the Challenge 2 solution, or did the author accidentally omit it?

2

It does seem to be incomplete.

My changes

class HintNode: SKSpriteNode, EventListenerNode, InteractiveNode
{
var shape = SKShapeNode()

var colors = [UIColor]()
var colorInt = 0

func didMoveToScene()
{
    isUserInteractionEnabled = true
    
    colors = [.red,.orange,.yellow]

…
shape.fillTexture = SKTexture(imageNamed: “wood_tinted”)
shape.alpha = 0.8
shape.fillColor = colors[colorInt]
// shape.fillColor = SKColor.green
…
Added
override func touchesEnded(_ touches: Set, with event: UIEvent?)
{
super.touchesEnded(touches, with: event)
interact()
}

func interact()
{
    colorInt = colorInt + 1
    if colorInt > 2
    {
        colorInt = 0
    }
    
    shape.fillColor = colors[colorInt]
    print("Change fill color to \(colors[colorInt])")
}

A little rough but it seems to work.

3

Just thought I’d post my solution. Thanks for the first reply to this post. It helped lead me in the right direction.

import SpriteKit

class HintNode: SKSpriteNode, EventListenerNode, InteractiveNode  {
    var shape = SKShapeNode()

    var arrowPath: CGPath = {
        let bezierPath = UIBezierPath()
        
        bezierPath.move(to: CGPoint(x: 0.5, y: 65.69))
        bezierPath.addLine(to: CGPoint(x: 74.99, y: 1.5))
        bezierPath.addLine(to: CGPoint(x: 74.99, y: 38.66))
        bezierPath.addLine(to: CGPoint(x: 257.5, y: 38.66))
        bezierPath.addLine(to: CGPoint(x: 257.5, y: 92.72))
        bezierPath.addLine(to: CGPoint(x: 74.99, y: 92.72))
        bezierPath.addLine(to: CGPoint(x: 74.99, y: 126.5))
        bezierPath.addLine(to: CGPoint(x: 0.5, y: 65.69))
        bezierPath.close()
        
        return bezierPath.cgPath
    }()
    
    func didMoveToScene() {
        isUserInteractionEnabled = true
        color = SKColor.clear
        
        shape = SKShapeNode(path: arrowPath)
        
        shape.strokeColor = SKColor.gray
        shape.lineWidth = 4
        shape.fillColor = SKColor.white
        shape.fillTexture = SKTexture(imageNamed: "wood_tinted")
        shape.alpha = 0.8
        
        let move = SKAction.moveBy(x: -40, y: 0, duration: 1.0)
        let bounce = SKAction.sequence([
            move, move.reversed()])
        let bounceAction = SKAction.repeat(bounce, count: 100)
        shape.run(bounceAction, completion: {
            self.removeFromParent()
        })
        
        addChild(shape)
    }
    
    func interact() {
        let color = [SKColor.red, SKColor.yellow, SKColor.orange]
        shape.fillColor = color[Int(arc4random_uniform(3))]
    }
    
    override func touchesEnded(_ touches: Set, with event: UIEvent?) {
        super.touchesEnded(touches, with: event)
        interact()
    }
}