マッチゲームの遅れがエラー＃2007

Question

私はGoogleで見つけたチュートリアルを使用しています。これはうまくいきます。しかし、私はそれが私の好きなように動作するようにいくつかの問題があります。私は短い時間のためにハングアップするために2番目のカードを取得しようとしたので、子供（プレーヤー）は、一致があるときに試合を見ることができます。私のコードでは、このカードが私に与えられました。TypeError：Error＃2007：パラメータの子は、一致する名声で非nullランタイムエラーでなければなりません。そして、新しいカードをクリックすると、除去される。 （そのままで）。

TypeError: Error : Parameter child must be non-null. 
     at flash.display::DisplayObjectContainer/removeChild() 
     at MatchingGameObject9/remove_tiles() 
     at flash.events::EventDispatcher/dispatchEventFunction() 
     at flash.events::EventDispatcher/dispatchEvent() 
     at flash.utils::Timer/tick() 



     package { 
     import flash.display.*; 
     import flash.events.*; 
     import flash.text.*; 
     import flash.utils.getTimer; 
     import flash.utils.Timer; 


    public class MatchingGameObject9 extends MovieClip { 
     // game constants 
     private static const boardWidth:uint = 6; 
     private static const boardHeight:uint = 5; 
     private static const cardHorizontalSpacing:Number = 87; 
     private static const cardVerticalSpacing:Number = 87; 
     private static const boardOffsetX:Number = 20; 
     private static const boardOffsetY:Number = 45; 
     private static const pointsForMatch:int = 100; 
     private static const pointsForMiss:int = -5; 

     private var firstCard:Card; 
     private var secondCard:Card; 
     private var cardsLeft:uint; 
     private var gameScore:int; 
     private var gameStartTime:uint; 
     private var gameTime:uint; 
     private var pause_timer:Timer; 
     private var gameScoreField:TextField; 
     private var gameTimeField:TextField; 

     public function MatchingGameObject9():void { 
      // make a list of card numbers 
      var cardlist:Array = new Array(); 
      for(var i:uint=0;i<boardWidth*boardHeight;i++) { 
       cardlist.push(i); 

      } 

      // create all the cards, position them, and assign a randomcard face to each 
      cardsLeft = 0; 
      for(var x:uint=0;x<boardWidth;x++) { // horizontal 
       for(var y:uint=0;y<boardHeight;y++) { // vertical 
        var c:Card = new Card(); // copy the movie clip 
        c.stop(); // stop on first frame 
        c.x = x*cardHorizontalSpacing+boardOffsetX; // set position 
        c.y = y*cardVerticalSpacing+boardOffsetY; 
        var r:uint = Math.floor(Math.random()*cardlist.length); // get a random face 
        c.cardface = cardlist[r]; // assign face to card 
        cardlist.splice(r,1); // remove face from list 
        c.addEventListener(MouseEvent.CLICK,clickCard); // have it listen for clicks 
        c.buttonMode = true; 
        addChild(c); // show the card 
        cardsLeft++; 
       } 
      } 

      gameScoreField = new TextField(); 
      addChild(gameScoreField); 
      gameScore = 0; 
      showGameScore(); 

      gameTimeField = new TextField(); 
      gameTimeField.x = 450; 
      addChild(gameTimeField); 
      gameStartTime = getTimer(); 
      gameTime = 0; 
      addEventListener(Event.ENTER_FRAME,showTime); 
     } 

     // player clicked on a card 
     public function clickCard(event:MouseEvent) { 
      var thisCard:Card = (event.target as Card); // what card? 

      if (firstCard == null) { // first card in a pair 
       firstCard = thisCard; // note it 
       firstCard.gotoAndStop(thisCard.cardface+2); // turn it over 

      } else if (firstCard == thisCard) { // clicked first card again 
       firstCard.gotoAndStop(1); // turn back over 
       firstCard = null; 

      } else if (secondCard == null) { // second card in a pair 
       secondCard = thisCard; // note it 
       secondCard.gotoAndStop(thisCard.cardface+2); // turn it over 

       // compare two cards 
       if (Math.floor(firstCard.cardface/2) == Math.floor(secondCard.cardface/2)) { 
        **pause_timer = new Timer(2000,1); 
        pause_timer.addEventListener(TimerEvent.TIMER_COMPLETE,remove_tiles); 
        pause_timer.start();** 
       } 

      } else { // starting to pick another pair 
       // reset previous pair 
       firstCard.gotoAndStop(1); 
       secondCard.gotoAndStop(1); 
       secondCard = null; 
       // select first card in next pair 
       firstCard = thisCard; 
       firstCard.gotoAndStop(thisCard.cardface+2); 
      } 
     } 

     public function showGameScore() { 
      gameScoreField.text = "ΣΚΟΡ: "+String(gameScore); 
     } 

     public function showTime(event:Event) { 
      gameTime = getTimer()-gameStartTime; 
      gameTimeField.text = "ΧΡΟΝΟΣ: "+clockTime(gameTime); 
     } 

     public function clockTime(ms:int) { 
      var seconds:int = Math.floor(ms/1000); 
      var minutes:int = Math.floor(seconds/60); 
      seconds -= minutes*60; 
      var timeString:String = minutes+":"+String(seconds+100).substr(1,2); 
      return timeString; 
     } 
     **public function remove_tiles(event:TimerEvent) { 
      removeChild(firstCard); 
        removeChild(secondCard); 
        // reset selection 
        firstCard = null; 
        secondCard = null; 
        // add points 
        gameScore += pointsForMatch; 
        showGameScore(); 
        // check for game over 
        cardsLeft -= 2; // 2 less cards 
        if (cardsLeft == 0) { 
         MovieClip(root).gameScore = gameScore; 
         MovieClip(root).gameTime = clockTime(gameTime); 
         MovieClip(root).gotoAndStop("gameover"); 
         pause_timer.removeEventListener(TimerEvent.TIMER_COMPLETE,remove_tiles); 
         } else { 
         gameScore += pointsForMiss; 
         showGameScore(); 
       }** 
    } 
} 

Answer 1

私はあなたが異なっ削除整理する必要があると思う：私は、これは誤りであると私のコードその後...

を任意の助けをいただければ幸いです。それが停止（なぜならcardsLeft> 0）としないpause_timerあなたが開始すると

var anEntry:Object = 
{ 
    "time": getTimer() + 2000, 
    "first": firstCard, 
    "second": secondCard, 
    "score": pointsForMatch 
} 

removalQueue.push(anEntry);