Using GameplayKit to control a D pad in the Scene

Community
1

So I am working through a book by Tammy Coron "Apple Game Frameworks and Technologies. So I have built the d pad to control a character. It builds and runs fine, however when I touch the d pad arrows the character does not move.

The Player swift code:

import SpriteKit

enum Direction: String {
case stop
case left
case right
case up
case down
}

class Player: SKSpriteNode {

func move(_ direction: Direction) {
print(" Entering Switch move player: (direction.rawValue)")
switch direction {

case .up:
  print("d-up")
  self.physicsBody?.velocity = CGVector(dx: 0, dy: 100)
  // self.physicsBody?.applyImpulse(CGvector(dx; 0, dy: 100))
  //self.physicsBody?.applyForce(CGVector(dx: 0. dy; 100))
case .down:
  print("d-down")
  self.physicsBody?.velocity = CGVector(dx: 0, dy: -100)
case .left:
  print("d-left")
  self.physicsBody?.velocity = CGVector(dx: -100, dy: 0)
case .right:
  print("d-right")
  self.physicsBody?.velocity = CGVector(dx: 100, dy: 0)
case .stop:
  print("p-stop")
  stop()

}

}

func stop() {
print(“stopping player”)
self.physicsBody?.velocity = CGVector(dx: 0, dy: 0)
}
}

This is the code from the GameScene.swift file:
func touchDown(atPoint pos : CGPoint) {
print(“inside touchDown”)
let nodeAtPoint = atPoint(pos)
if let touchedNode = nodeAtPoint as? SKSpriteNode {
if touchedNode.name?.starts(with: “controller_”) == true {
let direction = touchedNode.name?.replacingOccurrences(of: “controller_”, with: “”)
player?.move(Direction(rawValue: direction ?? “stop”)!)
}
}
}

If you could give me some hints as to what to check. I’ve been through the code multiple times and as far as I can see it should work…

Any help would be appreciated.

Thank you,

Bob

2

Im not sure if applying velocity is enough to make it move… You also need to move the coordinates itself (even just a little) to get it going… You know its like revving a car but it really wont move unless you change gears

Do you have an cwc+ membership? I made a simple spritekit game there maybe you can pick up something to help… Theres no D-pad though but the concept of movement should be the same

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3

Thank you! I am a CWC+ member and actually completed your tutorial on SpriteKit. I will revisit this today.

Thank you!!

Bob

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