Multiple movable objects in swift - ios

Question

I am trying to make a game that has five simple objects that the user can touch and move these have physics on them but having trouble getting them to move separately any help would be appreciated.
This is what I have so far:
import SpriteKit
class GameScene: SKScene {
let starSprite = SKSpriteNode(imageNamed: "starSprite")
let circleSprite = SKSpriteNode(imageNamed: "circleSprite")
let squareSprite = SKSpriteNode(imageNamed: "squareSprite")
let triangleSprite = SKSpriteNode(imageNamed: "triangleSprite")
let moonSprite = SKSpriteNode(imageNamed: "moonSprite")
var touchLocation = CGPoint()
override func didMove(to view: SKView) {
layoutScene()
}
func layoutScene() {
backgroundColor = UIColor(red: 44/255, green: 62/255, blue:
80/255, alpha: 1.0)
starSprite.size = CGSize(width: 350, height: 350)
starSprite.position = CGPoint(x: frame.midX, y: frame.midY)
starSprite.physicsBody = SKPhysicsBody(texture:
starSprite.texture!, size: starSprite.size)
addChild(starSprite)
circleSprite.size = CGSize(width: 350, height: 350)
circleSprite.position = CGPoint(x: 0, y: 100)
circleSprite.physicsBody = SKPhysicsBody(texture:
circleSprite.texture!, size: circleSprite.size)
addChild(circleSprite)
squareSprite.size = CGSize(width: 350, height: 350)
squareSprite.position = CGPoint(x: 0, y: 200)
squareSprite.physicsBody = SKPhysicsBody(texture:
squareSprite.texture!, size: squareSprite.size)
addChild(squareSprite)
triangleSprite.size = CGSize(width: 350, height: 350)
triangleSprite.position = CGPoint(x: 0, y: 300)
triangleSprite.physicsBody = SKPhysicsBody(texture:
triangleSprite.texture!, size: triangleSprite.size)
addChild(triangleSprite)
moonSprite.size = CGSize(width: 350, height: 350)
moonSprite.position = CGPoint(x: 0, y: 400)
moonSprite.physicsBody = SKPhysicsBody(texture:
moonSprite.texture!, size: moonSprite.size)
addChild(moonSprite)
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches{
touchLocation = touch.location(in: self)
moonSprite.position.x = (touchLocation.x)
moonSprite.position.y = (touchLocation.y)
starSprite.position.x = (touchLocation.x)
starSprite.position.y = (touchLocation.y)
}
}
}

Answer 1

you should first detect which object has been selected in touchDown, then change the position in touchesMoved, and release the object in touchUp!
define a value as a temp and use that!
In addition , and you don't need to use this
moonSprite.position.x = (touchLocation.x)
moonSprite.position.y = (touchLocation.y)
it's better
moonSprite.position = touchLocation
Edited Code
//
// GameScene.swift
// aa
//
// Created by ehsan on 1/30/19.
// Copyright © 2019 ehsan. All rights reserved.
//
import SpriteKit
import GameplayKit
class GameScene: SKScene {
private var spinnyNode1 = SKSpriteNode(imageNamed: "1")
private var spinnyNode2 = SKSpriteNode(imageNamed: "2")
private var movingSprite:SKSpriteNode?
override func didMove(to view: SKView) {
addChild(spinnyNode1)
addChild(spinnyNode2)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for t in touches {
let location = t.location(in: self)
let node = self.atPoint(location)
if node is SKSpriteNode
{
movingSprite = node as? SKSpriteNode
}
}
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
if movingSprite != nil
{
movingSprite!.position = touchLocation
}
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
movingSprite = nil
}
override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
for t in touches {
}
}
override func update(_ currentTime: TimeInterval) {
// Called before each frame is rendered
}
}