I would like to add lives to an exercise game that I do. The declaration and code would be:
We need to add to the game the characteristic of the lives in the game. We will make sure that our character has 3 lives in each game. If we collide, we will start again, but we will deduce a life from the character. So, up to 3 and once we finish our life, the GameOver message will appear. As long as we have lives, the score will increase so that if we collide a first time, we will continue with the same points we had before and so on in each life until the 3 are exhausted .
The code would be as follows:
import SpriteKit
import GameplayKit
class GameScene: SKScene, SKPhysicsContactDelegate {
enum Colisiones: UInt32 {
case Pajaro = 1
case Objeto = 2
case Brecha = 4
}
var gameOver = false
var pajaro = SKSpriteNode()
var fondo = SKSpriteNode()
var tubo1 = SKSpriteNode()
var tubo2 = SKSpriteNode()
var puntuacionLabel = SKLabelNode()
var puntuacion = 0
var gameOverLabel = SKLabelNode()
var timer = Timer()
var play = false
@objc func crearTubos(){
//Añadir Tubos
let brechaAltura = pajaro.size.height * 4
//Añadir random a los tubos
let movimiento = arc4random() % UInt32(self.frame.height / 2)
let tuboFuera = CGFloat(movimiento) -
self.frame.height / 4
//Añadir movimientos a los tubos
let moverTubos = SKAction.moveBy(x: -2 * self.frame.width, y: 0, duration: TimeInterval(self.frame.width/100))
//Añadir Tubo1
let tubo1Textura = SKTexture(imageNamed: "tubo2.png")
tubo1 = SKSpriteNode(texture: tubo1Textura)
tubo1.position = CGPoint(x: self.frame.midX + self.frame.width, y: self.frame.midY + tubo1Textura.size().height/2 + brechaAltura/2 + tuboFuera)
tubo1.run(moverTubos)
tubo1.physicsBody = SKPhysicsBody(rectangleOf: tubo1.size)
tubo1.physicsBody?.isDynamic = false
tubo1.physicsBody?.collisionBitMask = Colisiones.Objeto.rawValue
tubo1.physicsBody?.contactTestBitMask = Colisiones.Objeto.rawValue
tubo1.physicsBody?.categoryBitMask = Colisiones.Objeto.rawValue
tubo1.zPosition = -1
self.addChild(tubo1)
//Añadir Tubo2
let tubo2Textura = SKTexture(imageNamed: "tubo1.png")
tubo2 = SKSpriteNode(texture: tubo2Textura)
tubo2.position = CGPoint(x: self.frame.midX + self.frame.width, y: self.frame.midY -
tubo1Textura.size().height / 2 - brechaAltura / 2 + tuboFuera)
tubo2.run(moverTubos)
tubo2.physicsBody = SKPhysicsBody(rectangleOf: tubo2.size)
tubo2.physicsBody?.isDynamic = false
tubo2.physicsBody?.collisionBitMask = Colisiones.Objeto.rawValue
tubo2.physicsBody?.contactTestBitMask = Colisiones.Objeto.rawValue
tubo2.physicsBody?.categoryBitMask = Colisiones.Objeto.rawValue
tubo2.zPosition = -1
self.addChild(tubo2)
//Crear brecha
let brecha = SKNode()
brecha.position = CGPoint(x: self.frame.midX + self.frame.width, y: self.frame.midY + tuboFuera)
brecha.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: tubo1Textura.size().width, height: brechaAltura))
brecha.physicsBody!.isDynamic = false
brecha.run(moverTubos)
brecha.physicsBody?.collisionBitMask = Colisiones.Brecha.rawValue
brecha.physicsBody?.contactTestBitMask = Colisiones.Pajaro.rawValue
brecha.physicsBody?.categoryBitMask = Colisiones.Brecha.rawValue
self.addChild(brecha)
}
override func didMove(to view: SKView) {
self.physicsWorld.contactDelegate = self
setupGame()
}
func setupGame() {
// Añadir fondo
let fondoTextura = SKTexture(imageNamed: "fondo")
let animacion1 = SKAction.moveBy(x: -fondoTextura.size().width, y: 0, duration:7)
let animacion2 = SKAction.moveBy(x: fondoTextura.size().width, y: 0, duration: 0)
let movimientoFondo = SKAction.repeatForever(SKAction.sequence((animacion1, animacion2)))
var i: CGFloat = 0
while i < 3 {
fondo = SKSpriteNode(texture: fondoTextura)
fondo.position = CGPoint(x: fondoTextura.size().width *
i, y: self.frame.midY)
fondo.size.height = self.frame.height
fondo.run(movimientoFondo)
fondo.zPosition = -2
self.addChild(fondo)
i += 1
}
// Añadir pajaro
let pajaroTextura1 = SKTexture(imageNamed: "pajaro1")
let pajaroTextura2 = SKTexture(imageNamed: "pajaro2")
let animacionPajaro = SKAction.animate(with: (pajaroTextura1,
pajaroTextura2), timePerFrame: 0.1)
let movimientoPajaro = SKAction.repeatForever(animacionPajaro)
pajaro = SKSpriteNode(texture: pajaroTextura1)
pajaro.position = CGPoint(x: self.frame.midX, y: self.frame.midY)
pajaro.run(movimientoPajaro)
pajaro.physicsBody = SKPhysicsBody(circleOfRadius:
pajaroTextura1.size().height/2)
pajaro.physicsBody!.isDynamic = false
//Categorias con las que va a chocar
pajaro.physicsBody!.collisionBitMask = Colisiones.Pajaro.rawValue
pajaro.physicsBody!.contactTestBitMask = Colisiones.Objeto.rawValue
pajaro.physicsBody!.categoryBitMask = Colisiones.Pajaro.rawValue
self.addChild(pajaro)
//Crear suelo
let suelo = SKNode()
suelo.position = CGPoint(x: self.frame.midX, y: -self.frame.height/2)
suelo.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: self.frame.width, height: 1))
suelo.physicsBody?.isDynamic = false
suelo.physicsBody?.collisionBitMask = Colisiones.Objeto.rawValue
suelo.physicsBody?.contactTestBitMask = Colisiones.Objeto.rawValue
suelo.physicsBody?.categoryBitMask = Colisiones.Objeto.rawValue
self.addChild(suelo)
//Añadir puntuacion Label
puntuacionLabel.fontName = "Helvetica"
puntuacionLabel.fontSize = 40
puntuacionLabel.text = "0"
puntuacionLabel.position = CGPoint(x: self.frame.midX, y: self.frame.height / 2 - 110)
self.addChild(puntuacionLabel)
//Contador de vidas
}
func didBegin(_ contact: SKPhysicsContact) {
if !gameOver{
if contact.bodyA.categoryBitMask == Colisiones.Brecha.rawValue || contact.bodyB.categoryBitMask == Colisiones.Brecha.rawValue {
puntuacion += 1
puntuacionLabel.text = String(puntuacion)
}else{
// Añadir game Over label
gameOverLabel.fontName = "Helvetica"
gameOverLabel.fontSize = 40
gameOverLabel.text = "Game Over! Pulsa para comenzar"
gameOverLabel.position = CGPoint(x: self.frame.midX, y: self.frame.midY)
self.addChild(gameOverLabel)
self.speed = 0
gameOver = true
play = false
timer.invalidate()
}
}
}
override func touchesBegan(_ touches: Set, with event: UIEvent?) {
if !gameOver{
if !play{
//Añadir repeticion de los tubos
timer = Timer.scheduledTimer(timeInterval: 3, target: self, selector:
#selector(GameScene.crearTubos), userInfo:nil, repeats: true)
play = true
}
pajaro.physicsBody?.velocity = CGVector(dx: 0, dy: 0)
pajaro.physicsBody?.applyImpulse(CGVector(dx: 0, dy: 70))
pajaro.physicsBody?.isDynamic = true
} else {
puntuacion = 0
self.speed = 1
gameOver = false
self.removeAllChildren()
setupGame()
}
}
override func update(_ currentTime: TimeInterval) {
}
}
