TypeError : 오류 # 2007 : 매개 변수 hitTestObject가 null이 아니어야합니다.

Question

여기에 질문이 있습니다. 나는 우주 침략자 게임을하고있다. 오류 메시지가 표시됩니다.

TypeError : Error # 2007 : 매개 변수 hitTestObject는 null이 아니어야합니다. flash.display : DisplayObject입니다/hitTestObject() 적/eFrame() 나는 당신의 사람이 나를 도울 수 있기를 바랍니다

에서 에서 flash.display : DisplayObject입니다/_hitTest에서 () . 대단히 감사합니다!

//This is the basic skeleton that all classes must have 
package{ 
    //we have to import certain display objects and events 
    import flash.display.MovieClip; 
    import flash.events.*; 
    //this just means that Enemy will act like a MovieClip 
    public class Enemy extends MovieClip{ 
     //VARIABLES 
     //this will act as the root of the document 
     //so we can easily reference it within the class 
     private var _root:Object; 
     //how quickly the enemy will move 
     private var speed:int = 5; 
     //this function will run every time the Bullet is added 
     //to the stage 
     public function Enemy(){ 
      //adding events to this class 
      //functions that will run only when the MC is added 
      addEventListener(Event.ADDED, beginClass); 
      //functions that will run on enter frame 
      addEventListener(Event.ENTER_FRAME, eFrame); 
     } 
     private function beginClass(event:Event):void{ 
      _root = MovieClip(root); 
     } 









     private function eFrame(event:Event):void{ 
      //moving the bullet up screen 
      y += speed; 
      //making the bullet be removed if it goes off stage 
      if(this.y > stage.stageHeight){ 
       removeEventListener(Event.ENTER_FRAME, eFrame); 
       _root.removeChild(this); 
      } 

      //checking if it is touching any bullets 
      //we will have to run a for loop because there will be multiple bullets 
      for(var i:int = 0;i<_root.bulletContainer.numChildren;i++){ 
       //numChildren is just the amount of movieclips within 
       //the bulletContainer. 

       //we define a variable that will be the bullet that we are currently 
       //hit testing. 
       var bulletTarget:MovieClip = _root.bulletContainer.getChildAt(i); 


       //now we hit test 
       if(hitTestObject(bulletTarget)){ 
        //remove this from the stage if it touches a bullet 
        removeEventListener(Event.ENTER_FRAME, eFrame); 
        _root.removeChild(this); 
        //also remove the bullet and its listeners 
        _root.bulletContainer.removeChild(bulletTarget); 
        bulletTarget.removeListeners(); 
        //up the score 
        _root.score += 5; 
       } 
      } 

      //hit testing with the user 
      if(hitTestObject(_root.mcMain)){ 
       //losing the game 
       _root.gameOver = true; 
       _root.gotoAndStop('lose'); 
      } 

      if(_root.gameOver){ 
       removeEventListener(Event.ENTER_FRAME, eFrame); 
       this.parent.removeChild(this); 
      } 
     } 
     public function removeListeners():void{ 
      this.removeEventListener(Event.ENTER_FRAME, eFrame); 
     } 
    } 
} 

Answer 1

오류 란 코드에 hitTestObject(null)을 호출했음을 의미합니다. 이는 잘못되었습니다.

공유 한 코드에서 bulletTarget 또는 _root.mcMain이 원인 일 수 있습니다.