I have a file where I move a square from one side to a point near the middle of the screen.
After that, I want to move it to another position, but I am unsure of how to do that.
This is my code so far. When you run it, it moves to one point and then stops.
What I want it to do is it moves to that one point and immediately goes to a point with the same x value but a y value touching the top of the screen.
override func didMoveToView(view: SKView) {
self.physicsWorld.contactDelegate = self
createEnemies()
}
deinit{
print("deinit called")
}
func randomBetweenNumbers(firstNum: CGFloat, secondNum: CGFloat) -> CGFloat{
return CGFloat(arc4random()) / CGFloat(UINT32_MAX) * abs(firstNum - secondNum) + min(firstNum, secondNum)
}
//Helper method for spawning a point along the screen borders. This will not work for diagonal lines.
func randomPointBetween(start:CGPoint, end:CGPoint)->CGPoint{
return CGPoint(x: randomBetweenNumbers(start.x, secondNum: end.x), y: randomBetweenNumbers(start.y, secondNum: end.y))
}
func createEnemies(){
//Randomize spawning time.
//This will create a node every 0.5 +/- 0.1 seconds, means between 0.4 and 0.6 sec
let wait = SKAction .waitForDuration(0.5, withRange: 0.2)
weak var weakSelf = self //Use weakSelf to break a possible strong reference cycle
let spawn = SKAction.runBlock({
var random = arc4random() % 4 + 1
var position = CGPoint()
var moveTo = CGPoint()
var offset:CGFloat = 40
switch random {
//Left
case 1:
position = weakSelf!.randomPointBetween(CGPoint(x: 0, y: weakSelf!.frame.height/2), end: CGPoint(x: 0, y: weakSelf!.frame.height/2))
//Move to opposite side
moveTo = CGPoint(x: weakSelf!.frame.width/4, y: weakSelf!.frame.height/2)
//moveTo2 = CGPoint(x: weakSelf!.frame.width/4, y: weakSelf!.frame.height)
break
default:
break
}
weakSelf!.spawnEnemyAtPosition(position, moveTo: moveTo)
})
let spawning = SKAction.sequence([wait,spawn])
self.runAction(SKAction.repeatActionForever(spawning), withKey:"spawning")
}
func spawnEnemyAtPosition(position:CGPoint, moveTo:CGPoint){
let enemy = SKSpriteNode(color: SKColor.redColor(), size: CGSize(width: 40, height: 40))
enemy.position = position
enemy.physicsBody = SKPhysicsBody(rectangleOfSize: enemy.size)
enemy.physicsBody?.affectedByGravity = false
enemy.physicsBody?.dynamic = true
enemy.physicsBody?.collisionBitMask = 0 // no collisions
//Here you can randomize the value of duration parameter to change the speed of a node
let move = SKAction.moveTo(moveTo,duration: 2.5)
//let remove = SKAction.removeFromParent()
enemy.runAction(SKAction.sequence([move]))
/*if enemy.position = CGPoint(x: weakSelf!.frame.width/4, y: weakSelf!.frame.height/2) {
let move2 = SKAction.moveTo(moveTo2,duration: 2.5)
enemy.runAction(SKAction.sequence([move2]))
}*/
self.addChild(enemy)
print("\(enemy.position)")
}
func didBeginContact(contact: SKPhysicsContact) {
}
/*
Added for debugging purposes
override func touchesBegan(touches: NSSet, withEvent event: UIEvent?) {
//Just make a transition to the other scene, in order to check if deinit is called
//You have to make a new scene ... I named it WelcomeScene
var scene:WelcomeScene = WelcomeScene(fileNamed: "WelcomeScene.sks")
scene.scaleMode = .AspectFill
self.view?.presentScene(scene )
}
*/
