Contenir un noeud d'image-objet dans l'écran/la vue

Question

J'ai un noeud d'image-objet qui se déplace de gauche à droite avec l'appui de l'utilisateur. Cependant actuellement, il va quitter l'écran, je veux ajouter un nœud de chaque côté, donc si le nœud de sprite touche le nœud de chaque côté, il l'étreint et reste là jusqu'à ce que l'utilisateur touche pour le faire tourner dans la direction opposée.

C'est ce que j'ai pensé faire mais ça ne fonctionne pas actuellement.

let shipTexture = SKTexture(imageNamed: "ship.png") 
    ship = SKSpriteNode(texture: shipTexture) 
    ship.position = CGPoint(x: self.frame.midX, y: self.frame.midY) 
    ship.zPosition = 3 
    ship.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: 30, height: 100)) 
    ship.physicsBody!.isDynamic = true 
    ship.physicsBody?.collisionBitMask = 0b1 
    ship.physicsBody?.contactTestBitMask = 0b1 
    ship.physicsBody!.collisionBitMask = 0b1 
    ship.physicsBody?.affectedByGravity = false 
    self.addChild(ship) 



    let side = SKNode() 
    side.position = CGPoint(x: self.frame.width/2, y: self.frame.midY) 

    side.physicsBody = SKPhysicsBody(edgeLoopFrom: CGRect(x: -240, y: -160, width: 480, height: 320)) 

    side.physicsBody!.isDynamic = false 
    side.physicsBody?.collisionBitMask = 0b1 
    side.physicsBody?.contactTestBitMask = 0b1 
    side.physicsBody!.collisionBitMask = 0b1 

    self.addChild(side) 

    func didBegin(_ contact: SKPhysicsContact) { 
     print("Collision") 
    } 
} 

//var moveLeft = SKAction.moveBy(x: 800, y: 0, duration: 2) 
//frame.size.width 




override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { 




    ship.removeAllActions() 

    switch direction ?? .left { 
    case .left: 
     ship.run(SKAction.moveBy(x: -frame.size.width, y: 0, duration: 3)) 
    case .right: 
     ship.run(SKAction.moveBy(x: frame.size.width, y: 0, duration: 3)) 
    } 

    direction = direction == nil || direction == .right ? .left : .right 
} 

Answer 1

Je l'ai eu. La raison en est - vous utilisez une action pour déplacer votre nœud, mais devrait utiliser la physique - la force et l'impulsion

Essayez celui-ci:

import SpriteKit 
import GameplayKit 

var ship = SKSpriteNode() 
var bg = SKSpriteNode() 

class GameScene: SKScene, SKPhysicsContactDelegate { 


    override func didMove(to view: SKView) { 


     let bgTexture = SKTexture(imageNamed: "bg.png") 
     let moveBGanimation = SKAction.move(by: CGVector(dx: 0, dy: -bgTexture.size().height), duration: 4) 
     let shiftBGAnimation = SKAction.move(by: CGVector(dx: 0, dy: bgTexture.size().height), duration: 0) 
     let moveBGForever = SKAction.repeatForever(SKAction.sequence([moveBGanimation, shiftBGAnimation])) 

     var i: CGFloat = 0 

     while i < 3 { 

      bg = SKSpriteNode(texture: bgTexture) 
      bg.position = CGPoint(x: self.frame.midX, y: bgTexture.size().height * i) 
      bg.size.width = self.frame.width 

      bg.run(moveBGForever) 
      self.addChild(bg) 

      i += 1 

     } 

     let shipTexture = SKTexture(imageNamed: "ship.png") 
     ship = SKSpriteNode(texture: shipTexture) 
     ship.position = CGPoint(x: self.frame.midX, y: self.frame.midY) 
     ship.zPosition = 3 
     ship.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: 30, height: 100)) 
     ship.physicsBody!.isDynamic = true 
     ship.physicsBody?.collisionBitMask = 0b1 
     ship.physicsBody?.contactTestBitMask = 0b1 
     ship.physicsBody!.categoryBitMask = 0b1 
     ship.physicsBody?.affectedByGravity = false 
     self.addChild(ship) 

     let side = SKNode() 
     side.position = CGPoint(x: 0, y: 0) 
     side.physicsBody = SKPhysicsBody(edgeLoopFrom: CGRect(x: -self.frame.width/2, y: -self.frame.height/2, width: self.frame.width, height: self.frame.height)) 

     side.physicsBody!.isDynamic = false 
     side.physicsBody?.collisionBitMask = 0b1 
     side.physicsBody?.contactTestBitMask = 0b1 
     side.physicsBody!.categoryBitMask = 0b1 

     self.addChild(side) 

     self.physicsWorld.contactDelegate = self 

     func didBegin(_ contact: SKPhysicsContact) { 
      print("Collision") 
     } 

    } 

    //var moveLeft = SKAction.moveBy(x: 800, y: 0, duration: 2) 
    //frame.size.width 

    enum Direction: Int { 
     case left = 0 
     case right 
    } 

    var direction: Direction? 

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { 




     ship.removeAllActions() 

     switch direction ?? .left { 
     case .left: 
      ship.physicsBody?.applyImpulse(CGVector(dx: -20, dy: 0)) 
      //ship.run(SKAction.moveBy(x: -frame.size.width, y: 0, duration: 3)) 
     case .right: 
      ship.physicsBody?.applyImpulse(CGVector(dx: 20, dy: 0)) 
      //ship.run(SKAction.moveBy(x: frame.size.width, y: 0, duration: 3)) 
     } 

     direction = direction == nil || direction == .right ? .left : .right 
    } 




    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) { 



    } 

    override func update(_ currentTime: TimeInterval) { 


    } 
}