Question

我创造了一个能够永久地产生硬币的功能。但是，我在移除碰到它们的球触及的硬币时遇到了麻烦。顺便说一下，我在类中有一个名为coinBoolean的变量设置为false。这是我的代码：

  func didBeginContact(contact: SKPhysicsContact) {
    if ((contact.bodyA.categoryBitMask == groundGroup && contact.bodyB.categoryBitMask == ballGroup) ||
        (contact.bodyA.categoryBitMask == ballGroup && contact.bodyB.categoryBitMask == groundGroup)) { 
    }
    if ((contact.bodyA.categoryBitMask == ballGroup && contact.bodyB.categoryBitMask == coinGroup) ||
        (contact.bodyA.categoryBitMask == coinGroup && contact.bodyB.categoryBitMask == ballGroup)) {
        print("TRUE")
        coinBoolean = true
    }
    else {
        print("false")
        coinBoolean = false
    }
}

func addAndMoveCoins() {
    let coin = SKSpriteNode(imageNamed: "Coin")

    coin.zPosition = 55
    coin.position = CGPoint(x: self.frame.size.width*0.9, y: randomY())
    coin.physicsBody = SKPhysicsBody(rectangleOfSize: coin.size)
    coin.physicsBody?.categoryBitMask = coinGroup
    coin.physicsBody?.contactTestBitMask = ballGroup
    coin.physicsBody?.affectedByGravity = false
    coin.physicsBody?.dynamic = false
    let moveCoinLeft = SKAction.moveByX(-self.size.height, y: 0, duration: 5)
    let repeatAction1 = SKAction.repeatActionForever(moveCoinLeft)
    let removeObstacle1 = SKAction.removeFromParent()
    let moveAndRemove1 = SKAction.sequence([repeatAction1, removeObstacle1])
    coin.runAction(moveAndRemove1)
    self.addChild(coin)
    if coinBoolean == true {
        coin.removeFromParent()
    }
    else if coinBoolean == false {   
    }
}

func repeatCoins() {
    let generateCoins = SKAction.sequence([SKAction.runBlock(self.addAndMoveCoins), SKAction.waitForDuration(1.3)])
    let endlessAction = SKAction.repeatActionForever(generateCoins)
    runAction(endlessAction)
}

Answer 1

您的coinBoolean变量可能变化太快。我建议从碰撞（bodyA或bodyB）中获取要删除的节点，并将其从父节点

中删除

Answer 2

在接触阶段只需在硬币对象上设置一个动作，而不是做布尔值。

foreach (var time in times) { var now = time.Key; var expected = time.Value; TimeSpan timer; if (now <= startTime) { // no need to do anything here - just substract timer = startTime - now; } else { // normalize start time to current month var normalized = new DateTime(now.Year, now.Month, startTime.Day, startTime.Hour, startTime.Minute, startTime.Second); if (normalized >= now) { // normalized date is later in the same month - substract timer = normalized - now; } else { // normalized date is before current - move to next month timer = normalized.AddMonths(1) - now; } } if (last.Date != now.Date) Console.WriteLine(); Console.WriteLine($"{now:yyyy-MM-dd HH:mm} -> {startTime:yyyy-MM-dd HH:mm} = {timer:dd\\.hh} {(timer != expected ? "EXPECTED " + expected.ToString("dd\\.hh") : "CORRECT ")}"); last = now; }

你需要检查bodyA当然是否是硬币对象

当布尔值为true时，如何删除此节点？

2 个答案: