I need to detect touches on a circular skshapenode but the obvious code (below) fails. Identical code (but changing circle to triangle) works fine. It seems that there is a fundamental difference between SKShapeNodes of different shapes! Please could an expert advise?
Many thanks,
David C
import SpriteKit
class GameScene: SKScene {
var ball: SKShapeNode!
var triangle: SKShapeNode!
override func didMove(to view: SKView) {
backgroundColor = .white
ball = createBall()
ball.position = CGPoint.zero
addChild(ball)
triangle = createTriangle()
triangle.position = CGPoint(x: 0.0, y: 100.0)
addChild(triangle)
}
func createBall() -> SKShapeNode {
let Bpath = CGMutablePath()
Bpath.addArc(center: CGPoint.zero,
radius: 35,
startAngle: 0,
endAngle: CGFloat.pi * 2,
clockwise: true)
let ball = SKShapeNode(path: Bpath, centered: true)
ball.lineWidth = 1
ball.strokeColor = .black
ball.isUserInteractionEnabled = true
return ball
}
func createTriangle() -> SKShapeNode {
let Tpath = CGMutablePath()
Tpath.move(to: CGPoint(x: 0, y: 0))
Tpath.addLine(to: CGPoint(x: CGFloat(250), y: 0))
Tpath.addLine(to: CGPoint(x: CGFloat(125), y: CGFloat(125)))
Tpath.closeSubpath()
let triangle = SKShapeNode(path: Tpath, centered: true)
triangle.lineWidth = 1
triangle.strokeColor = .black
return(triangle)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches {
let location = touch.location(in: self)
print("\(location)") // diagnostic - produces output whenever click is NOT within ball SKShapeNode
if ball.contains(location) {
print("ball contains \(location)") // diagnostic - never produces output!!
}
if triangle.contains(location) {
print("triangle contains \(location)") // diagnostic - produces output!!
}
}
}
}
