拖放与目标

Question

我有点新的闪存as3，但我做课件的应用程序，涉及到拖动文字到合适的目标与分数，如果正确匹配，还包括一个20秒计时器，应该做一个练习。但是我的问题是，在我将正确的单词拖到自己的位置并获得相关分数后（我使用了10分每个正确答案），我仍然可以拖动单词并使用每个拖动的单词重复评分（即，我想不能拖动单词拖动），这使用户得分超过更高的分数（即90分，因为有9个词要拖动）。

这是我的编码;

stop();  
    import flash.events.MouseEvent; 
    import flash.events.TimerEvent;  
    import flash.utils.Timer;  
    var myscore1 = 0; score.text = myscore1+""; 

    var hitArray:Array = new Array(love_tgt, am_stud_tgt, living_tgt, is_improv_tgt, speak_tgt, 
            means_tgt, are_help_tgt, want_tgt, miss_tgt);  
    var dropArray:Array = new Array(love, am_stud, living, is_improv, speak, means, are_help, 
            want, miss);  
var positionsArray:Array = new Array(); 

    for (var i:int = 0; i < dropArray.length; i++) { 
     dropArray[i].buttonMode = true; 
     dropArray[i].addEventListener(MouseEvent.MOUSE_DOWN, mdown); 
     dropArray[i].addEventListener(MouseEvent.MOUSE_UP, mUp); 

     positionsArray.push({xPos:dropArray[i].x, yPos:dropArray[i].y}); 
    } 

    function mdown(e:MouseEvent):void { 
     e.currentTarget.startDrag(); 
     setChildIndex(MovieClip(e.currentTarget), numChildren - 1); 
    } 

    function mUp(e:MouseEvent):void { 
    var dropIndex:int = dropArray.indexOf(e.currentTarget); 
    var target:MovieClip = e.currentTarget as MovieClip;  
    target.stopDrag(); 

     if (target.hitTestObject(hitArray[dropIndex])) { 
       myscore1+=10; 
       score.text = myscore1+""; 

       target.x = hitArray[dropIndex].x; 
       target.y = hitArray[dropIndex].y; 
      }else{ 
       target.x = positionsArray[dropIndex].xPos; 
       target.y = positionsArray[dropIndex].yPos; 
      }  
    } 


    var myTimer1:Timer = new Timer(1000);  
    myTimer1.addEventListener(TimerEvent.TIMER, countdownHandler1);  
    function countdownHandler1(event:TimerEvent):void{  
    countdown.text = 20-myTimer1.currentCount+" s remaining"; 
      if(myTimer1.currentCount==20){ 
       gotoAndStop(46); 
      }  } 

     myTimer1.start(); 


    } 

Answer 1

您仍然可以拖动对象，因为它们仍然有事件侦听器。你所需要做的就是将其删除。

if (target.hitTestObject(hitArray[dropIndex])) { 
     myscore1+=10; 
     score.text = myscore1+""; 

     target.x = hitArray[dropIndex].x; 
     target.y = hitArray[dropIndex].y; 

     //add these 2 lines--------------------------------------------- 
     target.removeEventListener(MouseEvent.MOUSE_DOWN, mdown); 
     target.removeEventListener(MouseEvent.MOUSE_UP, mUp); 
     //-------------------------------------------------------------- 
}else{ 
     target.x = positionsArray[dropIndex].xPos; 
     target.y = positionsArray[dropIndex].yPos; 
}