Question

我正在使用 SwiftUI 并尝试从 SKScene 对象实现 touchesBegan 方法，以便在 SpriteView 的左半部分上触摸创建一个绿色框，在右半边上触摸创建一个红色框。这在一定程度上有效，但不能处理多个同时触摸。当不在 SwiftUI SpriteView 中运行时（即由 UIViewController 的 SKView 呈现时），它似乎工作正常。这是我的 GameScene.swift...

import SwiftUI
import SpriteKit

class GameScene: SKScene {
    override func didMove(to view: SKView) {
        physicsBody = SKPhysicsBody(edgeLoopFrom: frame)
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        for touch in touches {
            let colour: SKColor
            let location = touch.location(in: self)
            if location.x > self.frame.midX {
                print("right")
                colour = .red
            }
            else {
                print("left")
                colour = .green
            }
            let box = SKSpriteNode(color: colour, size: CGSize(width: 50, height: 50))
            box.position = location
            box.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: 50, height: 50))
            addChild(box)
        }
    }
}

...还有我的 ContentView.swift...

import SwiftUI
import SpriteKit

struct ContentView: View {
    var scene: SKScene {
        let scene = GameScene()
        scene.size = CGSize(width: 500, height: 350)
        scene.scaleMode = .fill
        return scene
    }
    
    var body: some View {
        SpriteView(scene: scene)
            .frame(width: 500, height: 350)
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

有什么想法吗？

SKScene touchesBegan 仅在从 SpriteView 呈现时才注册第一次触摸

0 个答案: