Create this swift file for iOS14 and you can preview it in SwiftUI under Xcode 12
- SKContentView.swift.sh Select all
//
// SKContentView.swift
//
import SwiftUI
import SpriteKit
class GameScene: SKScene {
// Nodes
var player : SKNode?
var joystick : SKNode?
var joystickKnob : SKNode?
// Boolean
var joystickAction = false
// Measure
var knobRadius : CGFloat = 50.0
// Sprite Engine added in Lesson 2
var previousTimeInterval : TimeInterval = 0
let playerSpeed = 4.0
override func didMove(to view: SKView) {
physicsBody = SKPhysicsBody(edgeLoopFrom: frame)
let player = SKSpriteNode(imageNamed: "player/1")
self.player = player
let joystick = SKSpriteNode(imageNamed: "arrow")
self.joystick = joystick
let joystickKnob = SKSpriteNode(imageNamed: "knob")
self.joystickKnob = joystickKnob
joystick.addChild(joystickKnob)
player.position = CGPoint(x: frame.midX, y: frame.size.height / 5 * 3)
joystick.position = CGPoint(x: 80, y: 80)
addChild(player)
addChild(joystick)
view.showsFPS = true
view.showsNodeCount = true
}
}
extension GameScene {
// Touch Began
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches {
if let joystickKnob = joystickKnob {
let location = touch.location(in: joystick!)
joystickAction = joystickKnob.frame.contains(location)
}
}
}
// Touch Moved
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
guard let joystick = joystick else { return }
guard let joystickKnob = joystickKnob else { return }
if !joystickAction { return }
// Distance
for touch in touches {
let position = touch.location(in: joystick)
let length = sqrt(pow(position.y, 2) + pow(position.x, 2))
let angle = atan2(position.y, position.x)
if knobRadius > length {
joystickKnob.position = position
} else {
joystickKnob.position = CGPoint(x: cos(angle) * knobRadius, y: sin(angle) * knobRadius)
}
}
}
// Touch End added in Lesson 2
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches {
let xJoystickCoordinate = touch.location(in: joystick!).x
let xLimit: CGFloat = 200.0
if xJoystickCoordinate > -xLimit && xJoystickCoordinate > xLimit {
resetKnobPosition()
}
}
}
}
// MARKS: Action added in Lesson 2
extension GameScene {
func resetKnobPosition() {
let initialPoint = CGPoint(x:0, y:0)
let moveBack = SKAction.move(to: initialPoint, duration:0.1)
moveBack.timingMode = .linear
joystickKnob?.run(moveBack)
joystickAction = false
}
}
// MARKS: Game Loop added in Lesson 2
extension GameScene {
override func update( _ currentTime: TimeInterval) {
let deltaTime = currentTime - previousTimeInterval
previousTimeInterval = currentTime
// player movement
guard let joystickKnob = joystickKnob else { return }
let xPosition = Double(joystickKnob.position.x)
let yPosition = Double(joystickKnob.position.y)
let displacement = CGVector(dx:deltaTime * xPosition * playerSpeed, dy:deltaTime * yPosition * playerSpeed)
let move = SKAction.move(by: displacement, duration:0)
player?.run(move)
}
}
struct SKContentView: View {
var scene: SKScene {
let scene = GameScene()
scene.size = CGSize(width: 300, height: 400)
scene.scaleMode = .fill
return scene
}
var body: some View {
SpriteView(scene: scene)
.frame(width: 300, height: 400)
.edgesIgnoringSafeArea(.all)
}
}
struct SKContentView_Previews: PreviewProvider {
static var previews: some View {
SKContentView()
}
}
player/1
No comments:
Post a Comment