Flash Actionscript 3.0动画循环

Question

我想创建一个侧滚动游戏。其中，我希望玩家能够射击吹飞镖。因为它是现在，如果玩家持有空格键，玩家的（这是一个MovieClip）拍摄动画循环。我希望动画只能在每个空格键上播放一次。

这里是代码，我使用：已被释放

 // Process the pressed key(s) 
    public function KeyPressed(event:KeyboardEvent):void { 
     // The Left Key was pressed 
     if (event.keyCode == Keyboard.LEFT) { 
      leftKeyPressed = true; 
     } 

     // The Right Key was pressed 
     if (event.keyCode == Keyboard.RIGHT) { 
      rightKeyPressed = true; 
     } 

     // The Up Key was pressed 
     if (event.keyCode == Keyboard.UP) { 
      upKeyPressed = true; 
     } 

     // The Down Key was pressed 
     if (event.keyCode == Keyboard.DOWN) { 
      downKeyPressed = true; 
     }   
     // The Space Key was pressed 
     if (event.keyCode == Keyboard.SPACE) { 
      spaceKeyPressed = true; 
     } 
    } // End of 'KeyPressed()' function  

该方法确定哪个键（一个或多个）：：

该方法确定哪个键（一个或多个）被按下

 public function KeyReleased(event:KeyboardEvent):void { 
     // The Left Key was released 
     if (event.keyCode == Keyboard.LEFT) { 
      leftKeyPressed = false; 
     } 

     // The Right Key was released 
     if (event.keyCode == Keyboard.RIGHT) { 
      rightKeyPressed = false; 
     } 

     // The Up Key was released 
     if (event.keyCode == Keyboard.UP) { 
      upKeyPressed = false; 
     } 

     // The Down Key was released 
     if (event.keyCode == Keyboard.DOWN) { 
      downKeyPressed = false; 
     } 

     // The Space Key was released 
     if (event.keyCode == Keyboard.SPACE) { 
      spaceKeyPressed = false; 
     } 
    } // End of 'KeyReleased()' function 

这是播放播放器的一个拍摄动画的代码示例：

if (onGround && !downKeyPressed && spaceKeyPressed) { 
        player.gotoAndStop(7); 
} 

我该如何防止第7个播放器帧持续循环？我只想在空格键被按下时动画播放一次。

谢谢！

Answer 1

只是一些快速的想法。

1）添加一个标志来表示玩家当前正在进行动画，isThrowing = false;例如。当您启动第一个飞镖并将其添加到上面的if语句中时，将其设置为true。在动画循环结束时，再次将其设置为false。

2）另一种方法是在您发送飞镖时删除事件监听器（或其中一些），并在飞镖完成后再次添加它们。

可能还有其他方法，但这些应该会给你一些探索的场所。

祝你好运！

Answer 2

只需将stop();添加到动画片段的第7帧即可。

但是，也许你更好地使用这种游戏的进入帧事件，这里是从一个游戏，我正在做一个编辑的切口：

private var controls:Object = new Object(); 

    private function addListeners() 
    { 
     stage.addEventListener(KeyboardEvent.KEY_DOWN,controlKeyboard); 
     stage.addEventListener(KeyboardEvent.KEY_UP,controlKeyboard); 
     stage.addEventListener(Event.ENTER_FRAME,updateGame); 
    } 

    private function controlKeyboard(e:KeyboardEvent) 
    { 
     var keydown:Boolean = new Boolean(); 

     if (e.type == "keyDown") 
     { 
      keydown = true; 
     } 

     controls[e.keyCode] = keydown; 
    } 

    private function updateGame(e:Event) 
    { 
     if (controls[Keyboard.SPACE]) 
     { 
      if (player.currentFrame == 1) 
      { 
       player.gotoAndPlay(2); 
      } 
     } 

     if (player.currentFrame == 7) 
     { 
      player.gotoAndStop(1); 
     } 

    }