I have a game where i touch a node and it runs some code. How do I change the SKShapeNode's color when touched? I tried to use node.fillColor = SKColor.blackcolor() for example but it says that I cannot do that even though thats how i originally created the SKShapeNode's color in the first place.
This is all writing within touches began method.
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
for touch: AnyObject in touches {
let positionOfTouch = touch.locationInNode(self)
let node = nodeAtPoint(positionOfTouch)
node.userInteractionEnabled = true
node.fillColor = UIColor.whiteColor()
This is the code I am using. But it keeps saying "Value of type SKNode has no member "fillColor"...But "fillColor" works in my DidMoveToView.
Thanks
The node you are likely to touch may be a parent or child node - an SKNode, not an SKShapeNode. That's what nodeAtPoint returns, and a generic SKNode doesn't have a fillColor. You need to check it is the class you are expecting by testing. Something like...
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
for touch: AnyObject in touches {
let positionOfTouch = touch.locationInNode(self)
if let node = nodeAtPoint(positionOfTouch) as? SKShapeNode {
node.userInteractionEnabled = true
node.fillColor = UIColor.whiteColor()
Related
Essentially I am trying to incorporate X2 gamescene buttons that do the following functions:
1) Tap to fly (this I have working)
2) Tap to shoot a projectile from Player position (I do not have working).
My problem is I currently have the fly func set when touched anywhere on the screen. I have tried the following :
This is in reference to my GameScene : I thought in order to split this out I would need a node on the screen to reference this function. This does not error in the console but does not appear in the GameScene.
// Button to trigger shooting :
let btnTest = SKSpriteNode(imageNamed: "Crater")
btnTest.setScale(0.2)
btnTest.name = "Button"
btnTest.zPosition = 10
btnTest.position = CGPoint(x: 100, y: 200)
self.addChild(btnTest)
Next in the Player class I have the following broken down:
var shooting = false
var shootAnimation = SKAction()
var noshootAnimation = SKAction()
Init func:
self.run(noshootAnimation, withKey: "noshootAnimation")
let projectile = SKSpriteNode(imageNamed: "Crater")
projectile.position = CGPoint (x: 100, y: 50)
projectile.zPosition = 20
projectile.name = "projectile"
// Assigning categories to Game objects:
self.physicsBody?.categoryBitMask =
PhysicsCategory.plane.rawValue
self.physicsBody?.contactTestBitMask =
PhysicsCategory.ground.rawValue
self.physicsBody?.collisionBitMask =
PhysicsCategory.ground.rawValue
self.physicsBody?.applyImpulse(CGVector(dx: 300, dy: 0))
self.addChild(projectile)
// Start the shoot animation, set shooting to true:
func startShooting() {
self.removeAction(forKey: "noshootAnimation")
self.shooting = true
}
// Stop the shoot animation, set shooting to false:
func stopShooting() {
self.removeAction(forKey: "shootAnimation")
self.shooting = false
}
The node appears in the GameScene which looks promising, finally I move to the last bit of code in the GameScene as follows:
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) for touch in (touches) {
let location = touch.location(in: self)
let nodeTouched = atPoint(location)
if let gameSprite = nodeTouched as? GameSprite {
gameSprite.onTap()
}
// Check the HUD buttons which I have appearing when game is over…
if nodeTouched.name == "restartGame" {
// Transition to a new version of the GameScene
// To restart the Game
self.view?.presentScene(GameScene(size: self.size), transition: .crossFade(withDuration: 0.6))
}
else if nodeTouched.name == "returnToMenu"{
// Transition to the main menu scene
self.view?.presentScene(MenuScene(size: self.size), transition: . crossFade(withDuration: 0.6))
}
}
Player.startFly()
player.startShooting()
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
Player.stopFly()
player.stopShooting()
}
override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
Player.stopFly()
player.stopShooting()
}
override func update(_ currentTime: TimeInterval) {
player.update()
}
}
Unfortunately nothing happens in the GameScene and the node doesn’t fire when the screen is pressed, with the code above is there anyway I can amend this to allow for both ‘tap to fly’ + ‘tap to shoot’ functions. I still can’t figure out how to get the button I had declared early on in the GameScene to appear in which my gesture / touch position can be localised to this node on the screen as oppose to the whole screen in which I have currently..
I can say this sounded more simple in my head to begin with than actually coding together.
Firstly, the above code does not have any calls to run the animation with the key "shootAnimation" and is missing the call to re-run the not-shooting animation when stopShooting() and the call to re-run the shooting animation in startShooting(). The methods should include these as shown below
func startShooting() {
self.removeAction(forKey: "noshootAnimation")
// Add this call
self.run(shootAnimation)
self.shooting = true
}
func stopShooting() {
self.removeAction(forKey: "shootAnimation")
// Add this call
self.run(noshootAnimation)
self.shooting = true
}
Secondly, the noshootAnimation and shootAnimation animations are empty actions: they will not do anything if initialized as SKAction(). Depending on what you are trying to do, there are a number of class methods of SKAction that will create actions for you here.
Thirdly, any SKNode (recall that a scene is an SKNode subclass) will not receive touch calls if the node's isUserInteractionEnabled property is set to false (to which it is defaulted); instead, it will be treated as if its parent received the call. However, should a node's isUserInteractionEnabled be true, it will be the one that receives the UIResponder calls, not its parent node. Make sure that this property is set to true for the scene and for any nodes that need to receive touches (you can do this in didMove(to:) in the scene or elsewhere).
I will now propose an improvement. I frequently use buttons in Spritekit, but they are all subclasses of a custom button class (itself a subclass of SKSpriteNode) that uses protocol delegation to alert members of touch events. The scheme looks like this:
class Button: SKSpriteNode {
weak var responder: ButtonResponder?
// Custom code
// MARK: UIResponder
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesBegan(touches, with: event)
// Respond here
responder?.respond(to: self)
}
}
protocol ButtonResponder: AnyObject {
func respond(to button: Button)
}
class MyScene: SKScene, ButtonResponder {
func respond(to button: Button) {
// Do something on touch, but typically check the name
switch button.name {
case "myButton":
// Do something specific
default:
break
}
}
override func didMove(to view: SKView) {
// Set the scene as a responder
let buttonInScene = childNode(withName: "myButton") as! Button
buttonInScene.responder = self
}
}
For more on delegation, look here. Hopefully this helped a little bit.
EDIT: Convert touch location
You can convert the touch to the node on the screen by passing a reference to the location(in:) method of UITouch instead of the scene as you did in your code
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesBegan(touches, with: event)
let yourNode = childNode(withName: "yourNode")!
for touch in touches {
let touchLocationToYourNode = touch.location(in: yourNode)
// Do something
}
}
Alternatively, use SKNode's convert(_:from:) and convert(_:to:) methods
let nodeA = SKNode()
let nodeB = SKNode()
nodeA.xScale = 1.5
nodeA.yScale = 1.2
nodeA.position = .init(x: 100, y: 100)
nodeA.zRotation = .pi
let pointInNodeACoordinateSystem = CGPoint(x: 100, y: 100)
let thatSamePointInNodeBCoordinateSystem = nodeB.convert(pointInNodeACoordinateSystem, from: nodeA)
I am new to coding in general. Recently starting coding in Swift.
Working on a simple Swift based drawing app in which I need to record an array of points over which user touches screen and moves finger.
I am using touchesMoved to record touch locations in a UIView. touchesMoved doesn't record all the points if user moves finger fast enough. If finger movement is slow, it records all points. I looked at earlier questions regarding this on this forum but couldn't figure out how to implement those. Any suggestions or direction on where to look for the answer will be highly appreciated.
Attached is the code I am using
import UIKit
class SketchView: UIView {
var lines = [Line]()
var lastPoint: CGPoint! //this is to track last touch of the user
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
let touch = touches.first! as UITouch
lastPoint = touch.locationInView(self)
}
override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
let touch = touches.first! as UITouch
let newPoint = touch.locationInView(self)
lines.append(Line(start: lastPoint, end: newPoint))
lastPoint = newPoint
self.setNeedsDisplay()
}
override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
print(" Sketch points number is \(lines.count)")
}
override func drawRect(rect: CGRect) {
let context = UIGraphicsGetCurrentContext()
CGContextBeginPath(context)
for line in lines {
CGContextMoveToPoint(context, line.start.x, line.start.y)
CGContextAddLineToPoint(context, line.end.x, line.end.y)
}
//CGContextSetLineCap(context, .Round)
CGContextSetRGBStrokeColor(context, 0, 0, 0, 1)
CGContextSetLineWidth(context, 5)
CGContextStrokePath(context)
}
}
Just to confirm that points are missing in my array, in the image below I am showing the x-coordinates stored in the array for a line a drew on screen.
Thanks.
My game has a ball and this ball has a gravity. I want to change ball's gravity when every touch on that. How can I do that? Here is my touchesBegan code :
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
for touch:AnyObject in touches{
let location = (touch as! UITouch).locationInNode(self)
let nodeTouched = nodeAtPoint(location)
let ball = childNodeWithName(BallCategoryName) as! SKSpriteNode
//Detect if the ball is touched
if(nodeTouched == ball){
physicsWorld.gravity = CGVectorMake(-30, 30)
}
}
I am having trouble with detecting a specific node being touched. Here is what i have to far.
let playagain = SKSpriteNode(imageNamed: "PlayAgain.png")
override func didMoveToView(view: SKView) {
super.didMoveToView(view)
}
then when the player dies these two nodes come up.
playagain.position = CGPoint(x:frame.size.width * 0.5, y: frame.size.height * 0.5)
addChild(playagain)
gameover.position = CGPoint(x:frame.size.width * 0.5, y: frame.size.height * 0.75)
addChild(gameover)
everything above works. the node comes on the screen where i asked i just can't seem to get it to show i clicked it.
as you can see the node is called playagain, when the playagain node is clicked i want to be able to refresh the game. what i have so far is below.
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
for touch in touches {
let location = (touch as! UITouch).locationInNode(self)
let play = self.nodeAtPoint(location)
if play.name == "playagain" {
println("touched")
}
}
}
thanks!
Are you not using the latest Xcode? Your touches began code should not run with swift 2 and Xcode 7.
Try this
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
for touch in touches {
let location = touch.locationInNode(self)
if playagain.containsPoint(location) {
/// playagain was pressed, do something
}
}
}
or this
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
for touch in touches {
let location = touch.locationInNode(self)
let touchedNode = self.nodeAtPoint(location)
if touchedNode == playagain {
/// playagain was pressed, do something
}
}
}
I'm trying to drag a SKSpirteNode around the screen by touching the screen. But I want to be able to do a constant movement of the Sprite, currently my code only moves the sprite to the location of my touch but if I hold and move the sprite will not follow. Moreover I don't want to "have" to touch the SKSpriteNode to activate the movement, I want to touch anywhere on the screen and to have a movement response from that SKSpriteNode.
Here is my current code:
class GameScene: SKScene {
override func didMoveToView(view: SKView) {
// SpriteNode I want to drag around
basket = SKSpriteNode(texture: basketTexture)
self.addChild(basket)
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
/* Called when a touch begins */
var nodeTouched = SKNode()
var currentNodeTouched = SKNode()
for touch: AnyObject in touches {
let location = touch.locationInNode(self)
nodeTouched = self.nodeAtPoint(location)
basket.position = location
}
Thank you any help appreciated.
I solved this by using the func touchesMoved instead of touchesBegan and works perfectly and smoothly. here is the final code:
class GameScene: SKScene {
override func didMoveToView(view: SKView) {
// SpriteNode I want to drag around
basket = SKSpriteNode(texture: basketTexture)
self.addChild(basket)
}
override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {
/* Called when a touch begins */
var nodeTouched = SKNode()
var currentNodeTouched = SKNode()
for touch: AnyObject in touches {
let location = touch.locationInNode(self)
nodeTouched = self.nodeAtPoint(location)
basket.position = location
}