Looping my code so that the user can continue to play - swift

Question

import SpriteKit
import GameplayKit
class GameScene: SKScene, SKPhysicsContactDelegate {
let balls = [
SKSpriteNode(imageNamed: "blueball.png"),
SKSpriteNode(imageNamed: "greenball.png"),
SKSpriteNode(imageNamed: "realredball.png"),
]
let redRectangle = SKSpriteNode(imageNamed: "redrectangle.png")
let blueRectangle = SKSpriteNode(imageNamed: "bluerectangle.png")
let greenRectangle = SKSpriteNode(imageNamed: "greenrectangle.png")
let wall1 = SKSpriteNode(imageNamed: "drop_wall.png")
let wall2 = SKSpriteNode(imageNamed: "drop_wall.png")
let bottom = SKSpriteNode(imageNamed:"drop_bottom.png")
let top = SKSpriteNode(imageNamed:"drop_bottom.png")
let blueBallCategory :UInt32 = 0x1 << 0
let greenBallCategory :UInt32 = 0x1 << 1
let realRedBallCategory :UInt32 = 0x1 << 2
let redRectangleCategory : UInt32 = 0x1 << 3
let blueRectangleCategory : UInt32 = 0x1 << 4
let greenRectangleCategory : UInt32 = 0x1 << 5
override func didMove(to view: SKView) {
spawnBalls()
spawnRectangles()
physicsWorld.contactDelegate = self
moveRectangles()
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for ball in balls{
ball.isUserInteractionEnabled = false
}
physics()
}
func didBegin(_ contact: SKPhysicsContact) {
let contactMask = contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask
switch contactMask {
case blueBallCategory | blueRectangleCategory:
for ball in balls{
ball.removeFromParent()
}
print("Alive! Blue ball has hit blue rectangle.")
case greenBallCategory | greenRectangleCategory:
print("Alive! Green ball has hit green rectangle.")
case realRedBallCategory | redRectangleCategory:
print("Alive! Red ball has hit red rectangle.")
case blueBallCategory | redRectangleCategory:
print("dead")
case blueBallCategory | greenRectangleCategory:
print("dead")
case realRedBallCategory | blueRectangleCategory:
print("dead")
case realRedBallCategory | greenRectangleCategory:
print("dead")
case greenBallCategory | redRectangleCategory:
print("dead")
case greenBallCategory | blueRectangleCategory:
print("dead")
default:
print("missed")
}
}
func spawnRectangles() {
redRectangle.position = CGPoint(x: 0, y: -400)
redRectangle.size = CGSize(width: 200, height: 20)
blueRectangle.position = CGPoint(x: -300, y: -200)
blueRectangle.size = CGSize(width: 200, height: 20)
greenRectangle.position = CGPoint(x: 100, y: -550)
greenRectangle.size = CGSize(width: 200, height: 20)
self.addChild(redRectangle)
self.addChild(blueRectangle)
self.addChild(greenRectangle)
wall1.position = CGPoint(x: -367.04, y: 0)
wall1.size = CGSize(width: 20, height: 1350)
wall1.physicsBody = SKPhysicsBody(rectangleOf: wall1.size)
wall1.physicsBody?.isDynamic = false
wall1.physicsBody?.affectedByGravity = false
self.addChild(wall1)
wall2.position = CGPoint(x: 367.04, y: 0)
wall2.size = CGSize(width: 20, height: 1350)
wall2.physicsBody = SKPhysicsBody(rectangleOf: wall2.size)
wall2.physicsBody?.isDynamic = false
wall2.physicsBody?.affectedByGravity = false
self.addChild(wall2)
top.position = CGPoint(x: 0, y: 657)
top.size = CGSize(width: 765, height: 20)
top.physicsBody = SKPhysicsBody(rectangleOf: top.size)
top.physicsBody?.isDynamic = false
top.physicsBody?.affectedByGravity = false
self.addChild(top)
bottom.size = CGSize(width: 765, height: 20)
bottom.position = CGPoint(x: 0, y: -657)
bottom.physicsBody = SKPhysicsBody(rectangleOf: bottom.size)
bottom.physicsBody?.isDynamic = false
bottom.physicsBody?.affectedByGravity = false
self.addChild(bottom)
}
func physics(){
for ball in balls{
ball.physicsBody = SKPhysicsBody(circleOfRadius: ball.size.height/2)
ball.physicsBody?.contactTestBitMask = blueRectangleCategory | greenRectangleCategory | redRectangleCategory
}
redRectangle.physicsBody = SKPhysicsBody(rectangleOf: redRectangle.size)
redRectangle.physicsBody?.affectedByGravity = false
redRectangle.physicsBody?.isDynamic = false
blueRectangle.physicsBody = SKPhysicsBody(rectangleOf: redRectangle.size)
blueRectangle.physicsBody?.affectedByGravity = false
blueRectangle.physicsBody?.isDynamic = false
greenRectangle.physicsBody = SKPhysicsBody(rectangleOf: redRectangle.size)
greenRectangle.physicsBody?.isDynamic = false
greenRectangle.physicsBody?.affectedByGravity = false
balls[0].physicsBody?.categoryBitMask = blueBallCategory
balls[1].physicsBody?.categoryBitMask = greenBallCategory
balls[2].physicsBody?.categoryBitMask = realRedBallCategory
redRectangle.physicsBody?.categoryBitMask = redRectangleCategory
blueRectangle.physicsBody?.categoryBitMask = blueRectangleCategory
greenRectangle.physicsBody?.categoryBitMask = greenRectangleCategory
}
func moveRectangles(){
let redMoveRight = SKAction.moveTo(x: 300, duration: 2)
let redMoveLeft = SKAction.moveTo(x: -280, duration: 2)
let redWholeMovement = SKAction.repeatForever(SKAction.sequence([redMoveRight,redMoveLeft]))
redRectangle.run(redWholeMovement)
let blueMoveRight = SKAction.moveTo(x: 300, duration: 2)
let blueMoveLeft = SKAction.moveTo(x: -280, duration: 1.5)
let blueWholeMovement = SKAction.repeatForever(SKAction.sequence([blueMoveRight,blueMoveLeft]))
blueRectangle.run(blueWholeMovement)
let greenMoveRight = SKAction.moveTo(x: 300, duration: 2)
let greenMoveLeft = SKAction.moveTo(x: -280, duration: 1.5)
let greenWholeMovement = SKAction.repeatForever(SKAction.sequence([greenMoveLeft,greenMoveRight]))
greenRectangle.run(greenWholeMovement)
}
func spawnBalls(){
let ball = balls[Int(arc4random_uniform(UInt32(balls.count)))]
ball.position = CGPoint(x: 0, y: 250)
ball.size = CGSize(width: 70, height: 70)
self.addChild(ball)
}
}
I want a new ball to spawn at the top of the screen if a ball hits a same colored rectangle. Right now when I run the app a randomly colored ball is spawned at the top and when the user clicks the ball drops. If the ball makes contact with a moving rectangle of the same color of the ball the game is supposed to keep going. But it just ends after. If anyone could help that would be great.Thanks!

Answer 1

You only spawn one ball in spawnBalls(). So when you touch only one ball appears. You should try to move spawnBalls() to touchesBegan().