SwiftUI SpriteView问题-已停止添加节点

我复制了以下代码示例或相同教程： 而且效果很好。之后，我想显示用户单击了多少次（添加了节点）。我使用了@Binding PropertyRapper，之后应用程序就停止正常工作了。我修不好。
如果要注释

score+=1

-一切重新开始

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    guard let touch = touches.first else { return }
    let location = touch.location(in: self)
    
    let box = SKSpriteNode(color: SKColor.red, size: CGSize(width: 50, height: 50))
    box.position = location
    box.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: 50, height: 50))
    
    self.addChild(box)
    score += 1 //<----- If to comment this line - everything working again!

    print("Nodes: \(self.children.count), score: \(score)")
}

2021-04-03 02:21:00.579404+0100 AP SwiftUI SpriteView iOS14[57663:9610434] Metal API Validation Enabled
Nodes: 1, score: 1
Nodes: 1, score: 2
Nodes: 1, score: 3
Nodes: 1, score: 4