ios - 在 Touches 中获取 SKSpriteNode 的属性

Question

我试图在 touchesBegan 方法中读取 SKSpriteNode 的属性，但该属性不存在。在其他地方创建的对象上的位置。

 let enemy = enemy(imageName: "enemy.png",force: "12")
 addChild(enemy)
 enemy.name = "enemy"
 print (enemy.force) // 12

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        guard let touch = touches.first else {
            return
        }
        let touchLocation = touch.location(in: self)
        let touchedNode = self.atPoint(touchLocation) as! SKSpriteNode
        if(touchedNode.name == "enemy"){
            print(enemy.force) //Force property does not exist
        }
    }

Answer 1

知道 SKSpriteNode 没有 force 属性，您应该使用继承 SKSpriteNode 属性的类名(用于制作 敌人..)

一个例子可能是这样的:

class Enemy : SKSpriteNode {
     var force: Int = 0
     ...
}

然后在你的游戏场景中做:

...
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    guard let touch = touches.first else { return }
    let touchLocation = touch.location(in: self)
    let touchedNode = self.atPoint(touchLocation)
    if(touchedNode.name == "enemy" && touchNode is Enemy){
       // Yes, I'm absolutely sure this is an enemy node..
       let enemy = touchedNode as! Enemy
       print(enemy.force)
    }
 }