Question

我正在制作一个游戏，我有一个球（玩家），假设从一侧到另一个屏幕。在两侧我都有一个SKSpriteNode，球需要触摸得到一分。当球接触侧面的SKSpriteNode时，球需要到达另一侧并触摸另一个SKSpriteNode以获得另一个点。等等。我怎样才能让游戏开始时顶部的spritenode处于活动状态，当触摸它时，底部的spritenode是活动的？

我做了一个＆＃34; incrementScore＆＃34;每当球触及＆＃34;点＆＃34;：

时，每增加一个得分的功能

func incrementScore() {
    score += 1
    scoreLabel.text = String(score)
}

然后我有两个＆＃34;目标＆＃34;球需要触及得分：

func createGoals() {

    let goalTop = SKSpriteNode(imageNamed: "Goal")
    goalTop.name = "Goal"
    goalTop.anchorPoint = CGPoint(x: 0.5, y: 0.5)
    goalTop.position = CGPoint(x: 0, y: 465)
    goalTop.physicsBody = SKPhysicsBody(rectangleOf: goalTop.size)
    goalTop.physicsBody?.affectedByGravity = false
    goalTop.physicsBody?.isDynamic = false
    goalTop.zPosition = 2
    self.addChild(goalTop)

    let goalBottom = SKSpriteNode(imageNamed: "Goal")
    goalBottom.name = "Goal"
    goalBottom.anchorPoint = CGPoint(x: 0.5, y: 0.5)
    goalBottom.position = CGPoint(x: 0, y: -435)
    goalBottom.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: 
    goalBottom.size.width - 10, height: goalBottom.size.height - 10))
    goalBottom.physicsBody?.affectedByGravity = false
    goalBottom.physicsBody?.isDynamic = false
    goalBottom.zPosition = 2
    self.addChild(goalBottom)

}

此外，我还开始使用didBegin联系人功能：

func didBegin(_ contact: SKPhysicsContact) {

    var firstBody = SKPhysicsBody()
    var secondBody = SKPhysicsBody()

    if contact.bodyA.node?.name == "Player" {
        firstBody = contact.bodyA
        secondBody = contact.bodyB
    } else {
        firstBody = contact.bodyB
        secondBody = contact.bodyA
    }

    if firstBody.node?.name == "Player" && secondBody.node?.name == 
    "Point" {
        incrementScore()
    }
}

Answer 1

使用categoryBitMask启用活动正文：

当您希望goalTop处于活动状态时：

goalTop.categoryBitMask = category.Goal
goalBottom.categoryBitMask = 0

当您希望goalBottom处于活动状态时：

goalTop.categoryBitMask = 0
goalBottom.categoryBitMask = category.Goal

注意：category.Goal是您用作类别的数字

使用SpriteKit

1 个答案: