一定的时间后停止滑雪

Question

我有许多敌人在游戏中的不同时间生成，并使用 SKAction 移动，但在每个关卡结束时我都会生成一个 Boss。当 Boss 生成时，我希望其他敌人停止生成。我对每个敌人都有一个函数。我在 SKAction.sequence 中为每个敌人使用 withKey:，然后在 boss 函数中使用 removeAction(forKey: )停止它，但它不起作用。我是否以错误的方式使用它。

我的代码示例（仅保留在 SKAction 代码中，删除了所有其他代码）

override func didMove(to view: SKView) {
       //Spawn Enemy1
        run(SKAction.repeatForever(
          SKAction.sequence([SKAction.run() { [weak self] in
                              self?.addEnemy1()
                            },
                            SKAction.wait(forDuration: 5.0)])))

}

func addEnemy1() {
        
        let delay = SKAction.wait(forDuration: 10)
        let actionMove = SKAction.moveTo(y: -600, duration: 5.0)
        let actionRemove = SKAction.removeFromParent()
        enemy1.run(SKAction.sequence([delay, actionMove, actionRemove]), withKey:"enemy1")
        
    }

func addBoss() {
        
        let move1 = SKAction.moveTo(y: size.height / 3.5, duration: 3)
        let move2 = SKAction.moveTo(x: size.width / 3, duration: 3)
        let move3 = SKAction.moveTo(x: 0 - boss.size.width, duration: 3)
        let move4 = SKAction.moveTo(x: 0, duration: 1.5)
        let move5 = SKAction.fadeOut(withDuration: 0.2)
        let move6 = SKAction.fadeIn(withDuration: 0.2)
        let move7 = SKAction.moveTo(y: 0 - boss.size.height * 3, duration: 3)
        let move8 = SKAction.moveTo(y: size.height / 3.5, duration: 3)

        let action = SKAction.repeat(SKAction.sequence([move5, move6]), count: 6)
        let repeatForever = SKAction.repeatForever(SKAction.sequence([move2, move3, move4, action, move7, move8]))
        let sequence = SKAction.sequence([move1, repeatForever])

        boss.run(sequence)
        
        enemy1.removeAction(forKey: "enemy1")
    }

Answer 1

您正在删除错误的操作。键“enemy1”的动作是：

SKAction.sequence([delay, actionMove, actionRemove])

它只是激活敌人。删除它只会暂时停止这一系列操作。当再次调用 addEnemy1 时，将再次添加操作序列。

生成敌人的操作是您在 self 上运行的操作：

    run(SKAction.repeatForever(
      SKAction.sequence([SKAction.run() { [weak self] in
                          self?.addEnemy1()
                        },
                        SKAction.wait(forDuration: 5.0)])))

您应该为该操作提供一个密钥：

...
},
SKAction.wait(forDuration: 5.0)])), withKey: "spawnEnemy")

然后将其从 self 中删除：

removeAction(forKey: "spawnEnemy")