I would like to repeatedly show one of the two games cards, whenever the user touches the deckOfCards.
I got it working once so far, but when I tap on the deckOfCards again, the card does not change. Trying this with 10 or more card names, didn't work either.
class GameScene: SKScene {
let cardname = ["card2", "ace"]
let randomNumber = Int(arc4random_uniform(13))
var deckOfCards = SKSpriteNode()
var yourCard = SKSpriteNode()
override func didMove(to view: SKView) {
deckOfCards = self.childNode(withName: "deckOfCards") as! SKSpriteNode
yourCard = self.childNode(withName: "yourCard") as! SKSpriteNode
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view?.endEditing(true)
for touch: AnyObject in touches {
let location = touch.location(in: self)
let node : SKNode = self.atPoint(location)
if node.name == "deckOfCards" {
yourCard.texture = SKTexture(imageNamed: "\(cardname[randomNumber])")
}
}
}
randomNumber is a constant outside of touchesBegan. It never changes. Put it inside touchesBegan.
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view?.endEditing(true)
for touch: AnyObject in touches {
let location = touch.location(in: self)
let node = self.atPoint(location)
let randomNumber = Int(arc4random_uniform(13))
if node.name == "deckOfCards" {
yourCard.texture = SKTexture(imageNamed: "\(cardname[randomNumber])")
}
}
}
Related
I'm creating a SpriteKit game that involves touching falling targets. Currently, the targets are too difficult to catch on first touch (touchesBegan:), and only seem to be touchable by positioning your finger ahead of time (touchesMoved:). Is there a technique for dampening touches or widening the touch location to make the first touch more effective? My code looks something like this right now:
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
guard let touch = touches.first else { return }
let positionInScene = touch.location(in: self)
print(positionInScene)
guard let touchedNode = self.nodes(at: positionInScene).first as? SKSpriteNode else { return }
if let dot = touchedNode.name {
if dot == "dot" {
removeTarget(touchedNode)
}
}
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
guard let touch = touches.first else { return }
let positionInScene = touch.location(in: self)
print(positionInScene)
guard let touchedNode = self.nodes(at: positionInScene).first as? SKSpriteNode else { return }
if let dot = touchedNode.name {
if dot == "dot" {
removeTarget(touchedNode)
}
}
}
Are your entities too small? With the given info, I recreated a small scene in a playground, and all is working as expected. If I have a presented child node, defined as
let circle = SKShapeNode(circleOfRadius: 20)
And I have defined both the physicsWorld of the SKScene, and physicsBody of the SKNode, with the given touchesBegan, there is no problem in detecting a collision.
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
if let location = touches.first?.location(in: self)
if self.atPoint(location) === circle {
print("TOUCH")
}
}
}
I am trying to implement moving to another scene when a wheel stops rotating. The code I have is shown below. I cannot figure out how to detect when the velocity has reached 0.0?
import SpriteKit
import GameplayKit
class GameplayScene: SKScene {
var player: Player?;
override func didMove(to view: SKView) {
player = self.childNode(withName: "spinner") as! Player?;
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches {
let location = touch.location(in: self)
if atPoint(location).name == "play_button" {
spin()
}
}
}
func spin () {
let random = GKRandomDistribution(lowestValue: 20, highestValue: 90)
let r = random.nextInt()
player?.physicsBody = SKPhysicsBody(circleOfRadius: CGFloat(self.frame.width))
player?.physicsBody?.affectedByGravity = false
player?.physicsBody?.isDynamic = true
player?.physicsBody?.allowsRotation = true
player?.physicsBody?.angularVelocity = CGFloat(r)
player?.physicsBody?.angularDamping = 1.0
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
}
}
So from here, I would like to execute the following when the wheel has stopped spinning:
let play_scene = Questions(fileNamed: "QuestionsScene")
play_scene?.scaleMode = .aspectFill
self.view?.presentScene(play_scene!, transition: SKTransition.doorsOpenVertical(withDuration: 1))
I have now edited the class and it looks as follows:
import SpriteKit
import GameplayKit
class GameplayScene: SKScene, SKSceneDelegate {
var player: Player?
override func didMove(to view: SKView) {
self.delegate = self
player = self.childNode(withName: "spinner") as! Player?;
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches {
let location = touch.location(in: self)
if atPoint(location).name == "play_button" {
spin()
}
}
}
func spin () {
let random = GKRandomDistribution(lowestValue: 20, highestValue: 90)
let r = random.nextInt()
player?.physicsBody = SKPhysicsBody(circleOfRadius: CGFloat(self.frame.width))
player?.physicsBody?.affectedByGravity = false
player?.physicsBody?.isDynamic = true
player?.physicsBody?.allowsRotation = true
player?.physicsBody?.pinned = true
player?.physicsBody?.angularVelocity = CGFloat(r)
player?.physicsBody?.angularDamping = 1.0
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
}
override func didSimulatePhysics() {
if ((player?.physicsBody?.angularVelocity)! <= CGFloat(0.01))
{
print("Got it")
}
}
}
Problem is I still receive an error on the if statement within didSimulatePhysics function. The error I receive is "Thread 1: EXC_BAD_INSTRUCTION...."
Your wheel's SKPhysicsBody has a built-in property, angularVelocity, that tells you how fast it's spinning. You're already using it when you set it to r to start the wheel spinning.
To watch angularVelocity you can use didSimulatePhysics(). It gets called once every frame, right after the physics calculations are done. That will look something like this:
func didSimulatePhysics() {
if wheelIsSpinning && angularVelocity != nil && angularVelocity! <= CGFloat(0.001) {
wheelIsSpinning = false
// wheel has stopped
// add your code here
}
}
Due to the vagaries of physics modeling, the angularVelocity might never be exactly zero. So instead we watch for it to be less than some arbitrary threshold, in this case 0.001.
You don't want it to execute every frame when the wheel isn't moving, so I added a property wheelIsSpinning to keep track. You'll need to add it as an instance property to GameplayScene, and set it to true in spin().
So basically I have a node called tree and I designed it in a .sks file.
I added a custom class for the skspritenode but the custom class doesn't seem to affect the node.
I am trying to detect touches on the node and its children.
This node is being transfered to multiple scenes using removefromparent() and addchild() functions so instead of writing duplicate code on each scene to detect the touch I am trying to use the custom node class to do it... any help would be appreciated.
note i have super.init function with the texture as it is necessary but I would like to use the node that was already created in the scene.
My class code
import SpriteKit
class tree: SKSpriteNode {
init() {
let texture = SKTexture(imageNamed: "tree")
super.init(texture: texture, color: SKColor.clear, size: texture.size())
self.isUserInteractionEnabled = true
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches {
print("touched!")
}
}
}
There is a good explanation in this answer that should be clear your ideas about SKS files and subclassing.
About your code it is a good habit to use uppercase letter for the class names, in your case I prefer to use class Tree instead of class tree.
About your second issue, you can use userData to transfer your object from a scene to another as explained below in my example:
import SpriteKit
class GameScene: SKScene {
private var label : SKLabelNode?
var tree : Tree!
override func didMove(to view: SKView) {
self.label = self.childNode(withName: "//helloLabel") as? SKLabelNode
if let label = self.label {
label.alpha = 0.0
label.run(SKAction.fadeIn(withDuration: 2.0))
}
self.isUserInteractionEnabled = true
tree = Tree()
tree.name = "tree"
addChild(tree)
tree.position = CGPoint(x:self.frame.midX,y:self.frame.midY)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch: AnyObject in touches {
let pointOfTouch = touch.location(in: self)
let nodeUserTapped = atPoint(pointOfTouch)
if nodeUserTapped.name == "tree" {
tree.removeFromParent()
let sceneToMoveTo = Scene2.init(size: self.size)
sceneToMoveTo.userData = NSMutableDictionary()
sceneToMoveTo.userData?.setObject(tree, forKey: "tree" as NSCopying)
let gameTransition = SKTransition.fade(withDuration: 0.5)
self.view!.presentScene(sceneToMoveTo, transition: gameTransition)
}
}
}
}
class Scene2: SKScene {
var tree:Tree!
override func didMove(to view: SKView) {
print("This is the scene: \(type(of:self))")
guard let previousValue = self.userData?.value(forKey: "tree") else { return }
if previousValue is Tree {
tree = previousValue as! Tree
addChild(tree)
tree.position = CGPoint(x:self.frame.midX,y:self.frame.midY)
}
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch: AnyObject in touches {
let pointOfTouch = touch.location(in: self)
let nodeUserTapped = atPoint(pointOfTouch)
if nodeUserTapped.name == "tree" {
tree.removeFromParent()
if let sceneToMoveTo = SKScene(fileNamed: "GameScene") {
sceneToMoveTo.scaleMode = .aspectFill
sceneToMoveTo.userData = NSMutableDictionary()
sceneToMoveTo.userData?.setObject(tree, forKey: "tree" as NSCopying)
let gameTransition = SKTransition.fade(withDuration: 0.5)
self.view!.presentScene(sceneToMoveTo, transition: gameTransition)
}
}
}
}
}
As you can read I've the control of touches both in my parent class and in my node, this can be made possible by changing the touchesBegan method of your custom SKSpriteNode as:
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches {
print("touched!")
}
guard let parent = self.parent else { return }
parent.touchesBegan(touches, with: event)
}
Remember that you should extend this approach also to the other touches method if you want to use them..
I am trying to read a property off of a SKSpriteNode in the touchesBegan method but the property does not exist. Where as it does on the created object elsewhere.
let enemy = enemy(imageName: "enemy.png",force: "12")
addChild(enemy)
enemy.name = "enemy"
print (enemy.force) // 12
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
guard let touch = touches.first else {
return
}
let touchLocation = touch.location(in: self)
let touchedNode = self.atPoint(touchLocation) as! SKSpriteNode
if(touchedNode.name == "enemy"){
print(enemy.force) //Force property does not exist
}
}
Knowing that SKSpriteNode don't have a force property, you should use your class name that inherits SKSpriteNode properties (used to make enemy..)
An example could be this:
class Enemy : SKSpriteNode {
var force: Int = 0
...
}
Then in your game scene do:
...
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
guard let touch = touches.first else { return }
let touchLocation = touch.location(in: self)
let touchedNode = self.atPoint(touchLocation)
if(touchedNode.name == "enemy" && touchNode is Enemy){
// Yes, I'm absolutely sure this is an enemy node..
let enemy = touchedNode as! Enemy
print(enemy.force)
}
}
I'm working with Swift and SpriteKit.
I have the following situation :
Here, each of the "triangles" is a SKShapenode.
My problem is that I would like to detect when someone touches the screen which triangle is being touched.
I assume that the hitbox of all these triangles are rectangles so my function returns me all the hitboxes touched while I only want to know which one is actually touched.
Is there any way to have a hitbox that perfectly match the shape instead of a rectangle ?
Here's my current code :
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?)
{
let touch = touches.first
let touchPosition = touch!.locationInNode(self)
let touchedNodes = self.nodesAtPoint(touchPosition)
print(touchedNodes) //this should return only one "triangle" named node
for touchedNode in touchedNodes
{
if let name = touchedNode.name
{
if name == "triangle"
{
let triangle = touchedNode as! SKShapeNode
// stuff here
}
}
}
}
You could try to use CGPathContainsPoint with a SKShapeNode instead of nodesAtPoint, which is more appropriate:
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?)
{
let touch = touches.first
let touchPosition = touch!.locationInNode(self)
self.enumerateChildNodesWithName("triangle") { node, _ in
// do something with node
if node is SKShapeNode {
if let p = (node as! SKShapeNode).path {
if CGPathContainsPoint(p, nil, touchPosition, false) {
print("you have touched triangle: \(node.name)")
let triangle = node as! SKShapeNode
// stuff here
}
}
}
}
}
This would be the easiest way of doing it.
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?)
{
for touch in touches {
let location = touch.locationInNode(self)
if theSpriteNode.containsPoint(location) {
//Do Whatever
}
}
}
The way I do this with Swift 4:
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
guard let touch = touches.first else {
return
}
let touchPosition = touch.location(in: self)
let touchedNodes = nodes(at: touchPosition)
for node in touchedNodes {
if let mynode = node as? SKShapeNode, node.name == "triangle" {
//stuff here
mynode.fillColor = .orange //...
}
}
}