SpriteKit動畫

Question

我有這段代碼可以在我按住我創建的按鈕的整個過程中執行動畫。不過，我希望在按鈕被按住時重複此操作。一旦我放棄了它，它會將精靈恢復到站立的位置。 func runForward() { let run = SKAction.animateWithTextures([ SKTexture(imageNamed: "walk1"), SKTexture(imageNamed: "walk2"), SKTexture(imageNamed: "walk3"), SKTexture(imageNamed: "walk4") ], timePerFrame: 0.09) _hero!.runAction(run) } 如果我將此代碼放入更新中，它會更新每一幀，導致動畫只有在我將手指從按鈕上擡起時纔會完成。如果我點擊按鈕啓動這個動畫，它只會在開始時執行它。我想知道如何讓它連續運行，直到我將手指從按鈕上移開。

繼承人只是在屏幕上放置一個Sprite節點的按鈕的代碼。 override func touchesBegan(touches: NSSet, withEvent event: UIEvent) { /* Called when a touch begins */
// Loop over all the touches in this event for touch: AnyObject in touches { // Get the location of the touch in this scene let location = touch.locationInNode(self) // Check if the location of the touch is within the button's
if (right.containsPoint(location)) { _right = true runForward() } } } override func touchesEnded(touches: NSSet, withEvent event: UIEvent) { _right = false }

Answer 1

你想要做的是啓動動畫，當你觸摸開始（touchesBegan）和結束動畫，當你觸摸結束（touchesEnded）。

因此，一旦觸摸開始，您應該執行一個永久重複的操作。這個動作將有一個關鍵（或名稱）。一旦你的觸摸結束，您可以使用密鑰（或名稱），以取消正在運行下去的動作（因此它會停止動畫）

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) { 
    for touch: AnyObject in touches { 
     let run = SKAction.animateWithTextures([ 
      SKTexture(imageNamed: "walk1"), 
      SKTexture(imageNamed: "walk2"), 
      SKTexture(imageNamed: "walk3"), 
      SKTexture(imageNamed: "walk4") 
      ], timePerFrame: 0.09) 
     hero.runAction(SKAction.repeatActionForever(SKAction.sequence([ 
         run, 
         SKAction.waitForDuration(0.001) 
         ]) 
         ), withKey: "heroRunning" 
        ) 
    } 
} 

override func touchesEnded(touches: NSSet, withEvent event: UIEvent) { 
    for touch: AnyObject in touches { 
     hero.removeActionForKey("heroRunning") 
    } 
}