ios - 当 Action 已经在 SpriteKit 中运行时停止 Action
<p><p>我有一个太空游戏，我现在每天都在扩展，但我遇到了一个我无法解决的问题。现在我为我的宇宙飞船添加了一个 PowerUp，它给了它一个盾牌。 Shield PowerUps 产生的持续时间为 37.5，范围为 15。这对我来说是完美的。我多么想弄清楚(或被展示)如何才能使这个盾牌只持续一定的秒数。</p>
<p>现在它会一直持续到被击中，这是失去它的一种方式，但我也想在上面设置一个计时器。</p>
<p>这是我的函数，用于激活与 PowerUp 碰撞时调用的 Shield:</p>
<pre><code>func activateShield() {
let shield1 = SKTexture(imageNamed: "shield-1")
let shield2 = SKTexture(imageNamed: "shield-2")
let shield3 = SKTexture(imageNamed: "shield-3")
let shield4 = SKTexture(imageNamed: "shield-4")
let shield5 = SKTexture(imageNamed: "shield-5")
let shield6 = SKTexture(imageNamed: "shield-6")
let animateShield = SKAction.sequence([
SKAction.wait(forDuration: 0, withRange: 0),
SKAction.animate(with: , timePerFrame: 0.10)])
let animateRepeatShield = SKAction.repeatForever(animateShield)
shield = SKSpriteNode(texture: shield1)
shield.name = "ShieldActive"
shield.setScale(1.5)
shield.position = player.position
shield.zPosition = 3
shield.physicsBody = SKPhysicsBody(rectangleOf: shield.size)
shield.physicsBody!.affectedByGravity = false
shield.physicsBody!.categoryBitMask = PhysicsCategories.ShieldActive
shield.physicsBody!.collisionBitMask = PhysicsCategories.Enemy
shield.physicsBody!.contactTestBitMask = PhysicsCategories.Enemy | PhysicsCategories.Life
shield.physicsBody!.isDynamic = true
shield.physicsBody!.density = 0
self.addChild(shield)
shield.run(animateRepeatShield)
let joint = SKPhysicsJointFixed.joint(withBodyA: player.physicsBody!, bodyB:shield.physicsBody!, anchor:player.position)
self.physicsWorld.add(joint)
}
</code></pre>
<p>这是我的代码中包含 SKActions 的另一部分:</p>
<pre><code> let spawnShield = SKAction.run(spawnAShield)
let waitToSpawnShield = SKAction.wait(forDuration: 37.5, withRange: 15) //Spawn time between 30 - 45 seconds
let spawnSequenceShield = SKAction.sequence()
let spawnForeverShield = SKAction.repeatForever(spawnSequenceShield)
self.run(spawnForeverShield, withKey: "spawningShieldPowerUps")
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>与 Jean-Baptiste 的回答类似，您也可以运行等待操作并在完成闭包中执行停用。一旦等待时间结束，关闭就会触发。</p>
<blockquote>
<p>edited to show the code in a func that could be called with different durations</p>
</blockquote>
<pre><code>var duration: Double = 5 //you can change this to any value. you could even change the value via code for different shields durations
deactivateShield(afterDuation: duration)
func deactivateShield(afterDuation: Double) {
shield.run(.wait(forDuration: duration)) {
self.deactivateShield()
}
}
</code></pre>
<blockquote>
<p>edit 2</p>
</blockquote>
<pre><code>func activateShield() {
let shield1 = SKTexture(imageNamed: "shield-1")
let shieldImages =
let animateShield = SKAction.animate(with: shieldImages, timePerFrame: 0.10)])
let animateRepeatShield = SKAction.repeatForever(animateShield)
shield = SKSpriteNode(texture: shield1)
shield.name = "ShieldActive"
shield.setScale(1.5)
shield.position = player.position
shield.zPosition = 3
shield.physicsBody = SKPhysicsBody(rectangleOf: shield.size)
shield.physicsBody!.affectedByGravity = false
shield.physicsBody!.categoryBitMask = PhysicsCategories.ShieldActive
shield.physicsBody!.collisionBitMask = PhysicsCategories.Enemy
shield.physicsBody!.contactTestBitMask = PhysicsCategories.Enemy | PhysicsCategories.Life
shield.physicsBody!.isDynamic = true
shield.physicsBody!.density = 0
self.addChild(shield)
shield.run(animateRepeatShield)
let joint = SKPhysicsJointFixed.joint(withBodyA: player.physicsBody!, bodyB:shield.physicsBody!, anchor:player.position)
self.physicsWorld.add(joint)
//turns off the shield in between 5-10 seconds
shield.run(.wait(forDuration: 7.5, withRange: 2.5)) {
self.shield.removeFromParent()
}
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - 当 Action 已经在 SpriteKit 中运行时停止 Action ，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/49412340/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/49412340/
</a>
</p>
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