Swift sprite作为按钮可切换

import SpriteKit

class ButtonNode: SKSpriteNode {
    var isToggledOn: Bool = false {
        didSet {
            // 根据 isToggledOn 的值更新按钮的外观
            texture = isToggledOn ? SKTexture(imageNamed: "button_on") : SKTexture(imageNamed: "button_off")
        }
    }
    
    init() {
        let texture = SKTexture(imageNamed: "button_off")
        super.init(texture: texture, color: .clear, size: texture.size())
        
        isUserInteractionEnabled = true // 允许用户交互
        
        // 添加按钮点击事件
        self.addTarget(self, selector: #selector(buttonPressed))
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    @objc func buttonPressed() {
        isToggledOn = !isToggledOn
    }
}