Hi I am new to Xcode and Swift, right now I am trying to design a game that involves a spaceship as player with alien spaceships.
I ran into a little problem where I am trying to differentiate the movement of the spaceship from the firing of the spaceship.
Basically I used touchesBegan() function to run the function which my spaceship fires, and touchesMoved() function to move the spaceship's x-position.
These are the code:
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
pShoot()
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches{
let location = touch.location(in: self)
spaceship.run(SKAction.moveTo(x: location.x, duration: 0.5))
}
}
What I am trying to do is to differentiate the clicking or touching indicator and pressed and move indicator, in other words I dont want the spaceship to fire when I am pressed and move on the screen, and I do not want the spaceship to move when I am clicking constantly but at different position. ( touchesMoved() detects changes in touch positions so if I am clicking at different positions spaceship will move which I dont want)
I would like to know what would be the best way of implementing this, thank you.
You could try checking the area that the user pressed and deciding whether or not to move the spaceship depending on the origin of the touch.
Related
I am currently working on a game in SpriteKit, where I need to move a sprite in response to touch (i.e when user swipes or pans anywhere in SKView.
I want to get the direction of pan (for swipe I know how to do it),so that the sprite will move according to pan (I have a path defined for the sprite if user pans or according to swipe if user swipes), the way touch in iOS appdrawer works i.e it responds to slightest of swipes and also pans (i.e when you pan forwards or backwards, it makes a decision whether you want to move to the next screen or not).
Is there any documentation or so? (I have gone through the UIGestureRecognizer documentation, but I haven't been able to find a way to implement it.)
I use something similar on my MenuScene, I have 3 pages setup that the user can scroll through to get various game data. But I don't want the slightest touch to move the screen, it would be to jarring for the user. So I just watch the finger movements in the Touches functions and check if the movement is greater that an amount I designate as the minimum move amount and if it is greater than I scroll the page. In your case you could handle it as; if it is greater than the minimum move amount treat as a pan else treat it as a swipe
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
let touch: UITouch = touches.first!
initialTouch = touch.location(in: self.view!)
moveAmtY = 0
moveAmtX = 0
initialPosition = menuScroller.position
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
let touch: UITouch = touches.first!
let movingPoint: CGPoint = touch.location(in: self.view!)
moveAmtX = movingPoint.x - initialTouch.x
moveAmtY = movingPoint.y - initialTouch.y
//their finger is on the page and is moving around just move the scroller and parallax backgrounds around with them
//Check if it needs to scroll to the next page when they release their finger
menuScroller.position = CGPoint(x: initialPosition.x + moveAmtX, y: initialPosition.y)
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
//they havent moved far enough so just reset the page to the original position
if fabs(moveAmtX) > 0 && fabs(moveAmtX) < minimum_detect_distance {
resetPages()
}
//the user has swiped past the designated distance, so assume that they want the page to scroll
if moveAmtX < -minimum_detect_distance {
moveLeft()
}
else if moveAmtX > minimum_detect_distance {
moveRight()
}
}
I am trying to rotate a sprite using swift, IOS 10 and the touchesmoved function, the code I have works in the fact it moves the sprite but in not the right way, the wrong directions etc.
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesMoved(touches, with: event)
guard let touch=touches.first{
return
}
let touchLocation = touch.location(in: self)
self.zRotation=CGFloat(atan2(Double(touchLocation.y), Double(touchLocation.x)))
}
does anyone know the correct way to rotate a sprite using zRotation and touchesMoved?
Thank you
I think you've probably overlooked the wonderful power of constraints in SpriteKit. Easy enough to do, Apple does a terrible job of promoting, presenting and educating those considering using SpriteKit.
Constraints allow you to say "go here", or "look at this".
In your case, the "look at this" is ideal, from the docs:
Orientation Constraints
A common use for orientation constraints is to make a look-at
constraint. For example, you may create a look-at constraint to make a
pair of eyes follow a moving object or to have a rocket point in the
direction of its target.
More specifically, you can use these in your touchesMoved:
https://developer.apple.com/reference/spritekit/skconstraint/1519627-orient
thanks for all the suggestions. Yes my explanation of the problem was not too great. so will add the full code here and it seems to be working apart from occasionally moving by 90 degrees on its own when i stop dragging and start dragging again
What I was trying to do was rotate a sprite around another sprite for example a cannon barrel around its wheel... When the wheel is loaded from the scene it calls this class and adds a child node (the barrel) which should be able to be moved around its wheel
import SpriteKit
class WheelNode: SKSpriteNode, CustomNodeEvent{
private var tubeNode=SKSpriteNode(imageNamed: "cannon-barrel")
var previousPoint:CGPoint!
var touchLocation:CGPoint!
func didMoveToScene() {
guard let scene=scene else{
return
}
isUserInteractionEnabled=true
tubeNode.anchorPoint=CGPoint(x:0, y:0)
tubeNode.position=position
self.addChild(tubeNode)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
if let touch=touches.first{
previousPoint=touch.location(in: scene!)
}
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesMoved(touches, with: event)
if let touch=touches.first{
touchLocation=touch.location(in: scene!)
var angle=atan2(touchLocation.y-previousPoint.y, touchLocation.x-previousPoint.x)
self.zRotation=angle
}
}
}
I am making a SpriteKit game where in order to begin the game, you need to hold two separate spots (SKShapeNodes) for 3 seconds. If you let go either finger or move either finger off a node, the game will not start. I have it working fine with 1 spot, but when I try to do 2 spots, I'm stuck. What is the simplest way to detect the 2 correct touches on the correct nodes?
This doesn't seem like a very uncommon situation, so if anyone knows the best way to handle this, I would appreciate the help.
Swift preferred, also.
Set multipleTouchEnabled to YES and use the touchesForView: method.
You can get more specific information on multi touch from the Apple Docs Multitouch Events.
The main idea is to have all touches when users provides any actions and operate them at the same time.
So, add 3 handlers to your Scene class:
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
checkTouches((event?.allTouches())!)
}
override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
checkTouches((event?.allTouches())!)
}
override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
checkTouches((event?.allTouches())!)
}
In the checkTouches function you will see all touches with updated properties (like positions etc).
Simple example:
func checkTouches(touches: Set<UITouch>) {
// iterate over all touches
for t in touches {
let touch = t as UITouch
let touchLocation = touch.locationInNode(self)
if... <-- YOUR CODE HERE TO CHECK NODE NAME AND TOUCHED TIME
}
}
Using this approach you will be able to handle any changes simultaniously.
E.g. user may touch on your node, then move finger outside it and then move bach to this node.
Enjoy!
i'm try to make my first game in sprite kit using swift
everything work fine for now but i couldn't know how could handle touch and hold in the screen
i'm try to make a jump power when the player hold the touch but i can't find event for this
thanks ;)
you can try this :
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
// action when the user touches the screen
// you can know where did he touch the screen like this
let touchLocation = touches?.anyObject().locationInView(self/* or your view */)
}
override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {
// your code here
}
override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {
// your code here
}
those method will help cary touches events in your screen
As I understand you need to handle 2 situations
1 - player taps on the screen/node - e.g. to jump
2 - player taps and holds - e.g. to change jump power
I think you need to handle both "touchesBegan" and "touchesEnded".
In "touchesBegan" start special timer and after some delay (e.g. 0.5 secs) start playing special animation for it (jump power indicator that shows current jump power)
on "touchesEnded" - stop timer, stop animation and calculate result jump power (based on timer's value).
If you also need to handle direction (angle) of jump - in this case you should also handle "touchesMoved" and calculate current angle based on touch position.
Hi I am currently moving a sprite by checking if the button was pressed in touchesBegan and then updating the position in update. I am doing this so that the user does not need to keep pressing the move up/down/left/right etc button over and over. The problem is that sometimes the sprite does not stop moving which im sure is due to this. Does anyone know a better solution to this? For brevity I will show you the way I am taking care of the up button.
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
for touch: AnyObject in touches {
// Get the location of the touch in this scene
let location = touch.locationInNode(self)
// Check if the location of the touch is within the button's bounds
if upButton.containsPoint(location) {
upButtonPressed = true
}
override func update(currentTime: CFTimeInterval) {
if upButtonPressed == true {
ball.position.y += 3
}
I kept it simple here but I do have all the conditions to stop movement in my code. I am simply wondering if there is an easier way to do this with maybe a long press gesture recognizer?