SpriteKit Animation isn't loading when it supposed to be. What am I doing wrong?

Question

I'm making a simple game. Hero should jump over the enemies and if they collide - enemy should eat the hero. I have 4 types of enemies randomly spawning in front of a hero. I use the first sprite of every enemy-array as a main, the rest are for animation. But when they collide - nothing happens, it's still the first sprite. That's how I'm doing it:

let mouseAtlas = SKTextureAtlas(named: "mouse") 
mouseArray.append(mouseAtlas.textureNamed("mouse_0"));
mouseArray.append(mouseAtlas.textureNamed("mouse_1"));
mouseArray.append(mouseAtlas.textureNamed("mouse_2"));
mouseArray.append(mouseAtlas.textureNamed("mouse_3"));

Mouse is an enemy, cookie is a hero.

mouse = SKSpriteNode(texture: mouseArray[0]);
self.mouse.position = CGPointMake(CGRectGetMaxX(self.frame) + self.cookie.size.width, self.cookieSpot + self.cookie.size.height + self.cookie.size.height / 2)
self.mouse.size = CGSizeMake(self.cookie.size.width + self.cookie.size.width / 2, self.cookie.size.height + cookie.size.height / 2)    

self.addChild(cookie)
self.addChild(mouse)

Then I'm applying physic bodies to them:

self.cookie.physicsBody = SKPhysicsBody(circleOfRadius: CGFloat(self.cookie.size.width / 2))
self.cookie.physicsBody?.affectedByGravity = false
self.cookie.physicsBody?.categoryBitMask = ColliderType.Cookie.rawValue
self.cookie.physicsBody?.collisionBitMask = ColliderType.Pet.rawValue
self.cookie.physicsBody?.contactTestBitMask = ColliderType.Pet.rawValue

self.mouse.physicsBody = SKPhysicsBody(rectangleOfSize: self.mouse.size)
self.mouse.physicsBody?.dynamic = false
self.mouse.physicsBody?.categoryBitMask = ColliderType.Pet.rawValue
self.mouse.physicsBody?.contactTestBitMask = ColliderType.Cookie.rawValue
self.mouse.physicsBody?.collisionBitMask = ColliderType.Cookie.rawValue

And then I'm trying to make an animation when contact begins:

func didBeginContact(contact: SKPhysicsContact) {
    eatenByMouse(); eatenByHamster(); eatenByRabbit(); eatenByCat()
}

func eatenByMouse() {
    self.groundSpeed = 0
    self.cookie.hidden = true
 let animateAction = SKAction.animateWithTextures(self.mouseArray, timePerFrame: 0.1)
}

Like I said, there are 4 types of enemies but they are practically the same. What am I doing wrong with that? An I also interested, could I make physics body of enemies only on one side? I mean how can one make my hero eaten only if it touched enemies mouth for example? And if it touches the tail it would proceed rolling and jumping? Many thanks!

rakeshbs rakeshbs · Accepted Answer · 2015-03-11T10:34:37

You have to run the SKAction after creating it.

func eatenByMouse() {
    self.groundSpeed = 0
    self.cookie.hidden = true
    let animateAction = SKAction.animateWithTextures(self.mouseArray, timePerFrame: 0.1)
    self.mouse.runAction(animateAction) // added line.
}

You can use SKPhysicsContact.contactPoint to detect point of collision.

SpriteKit Animation isn't loading when it supposed to be. What am I doing wrong?

1 Answers