AS3 removeChild之错误

主 - 创建预加载预载 - createas网站网站 - 创建的MainMenu

在主菜单中单击按钮时，它会创建一个对象。而当另一个被点击时，该对象需要被删除。拆卸部分有点混乱。

package src 
{ 
import com.greensock.TweenLite; 
import flash.display.MovieClip; 
import flash.events.MouseEvent; 
import flash.geom.Point; 
/** 
$(CBI)* ... 
$(CBI)* @author servet 
$(CBI)*/ 
public class MainMenu extends MovieClip 
{ 
    public var filmlerButton:MovieClip; 
    public var filmleralt:FilmAltButtonlar; 

    private var ANASAYFA_ORIGINAL_Y:Number; 
    private var HAKKIMIZDA_ORIGINAL_Y:Number; 
    private var FILMLER_ORIGINAL_Y:Number; 
    private var DAGITIM_ORIGINAL_Y:Number; 

    private var state:String; 

    public function MainMenu() 
    { 
     init(); 
    } 

    private function init():void 
    { 
     repos(); 
     assignOriginalHeights(); 
     state = " "; 

     filmlerButton.filmlerhitarea.alpha = 0; 

     anasayfaButton.addEventListener(MouseEvent.CLICK, onAnasayfaClick); 
     hakkimizdaButton.addEventListener(MouseEvent.CLICK, onhakkimizdaClick); 
     filmlerButton.filmlerhitarea.addEventListener(MouseEvent.CLICK, onfilmlerClick); 
     dagitimButton.addEventListener(MouseEvent.CLICK, ondagitimClick); 
    } 

    private function assignOriginalHeights():void 
    { 
     ANASAYFA_ORIGINAL_Y = anasayfaButton.y; 
     HAKKIMIZDA_ORIGINAL_Y = hakkimizdaButton.y; 
     FILMLER_ORIGINAL_Y = filmlerButton.y; 
     DAGITIM_ORIGINAL_Y = dagitimButton.y; 

     //trace(ANASAYFA_ORIGINAL_Y, HAKKIMIZDA_ORIGINAL_Y, FILMLER_ORIGINAL_Y, DAGITIM_ORIGINAL_Y); 
    } 

    private function ondagitimClick(e:MouseEvent):void 
    { 
     if (state != "anasayfa"&&state!="hakkimizda"&&state!="filmler"&&state!="dagitim") { 
      state = "dagitim"; 
      traceState(); 

      dagitimButton.gotoAndStop(2); 
     }else { 
      state = " "; 
      traceState(); 

      closeAllMenus(); 
     } 
    } 

    private function onfilmlerClick(e:MouseEvent):void 
    { 
     if (state != "anasayfa"&&state!="hakkimizda"&&state!="filmler"&&state!="dagitim") { 
      closeAllMenus(); 
      state = "filmler"; 
      traceState(); 

      filmlerButton.gotoAndStop(2); 

      filmleralt = new FilmAltButtonlar(); 
      addChild(filmleralt); 
      filmleralt.name = "trouble"; 
      //OBJECT ADDED HERE 

      TweenLite.to(dagitimButton, 1, {y:DAGITIM_ORIGINAL_Y+400 }); 
     }else { 
      state = " "; 
      traceState(); 

      closeAllMenus(); 
     } 
    } 

    private function onhakkimizdaClick(e:MouseEvent):void 
    { 
     if (state != "anasayfa"&&state!="hakkimizda"&&state!="filmler"&&state!="dagitim") { 
      closeAllMenus(); 
      state = "hakkimizda"; 
      traceState(); 

      hakkimizdaButton.gotoAndStop(2); 

      TweenLite.to(filmlerButton, 1, {y:FILMLER_ORIGINAL_Y+200 }); 
      TweenLite.to(dagitimButton, 1, {y:DAGITIM_ORIGINAL_Y+200 }); 
     }else { 
      state = " "; 
      traceState(); 

      closeAllMenus(); 
     } 
    } 

    private function onAnasayfaClick(e:MouseEvent):void    //&& girecek 
    { 
     if (state != "anasayfa"&&state!="hakkimizda"&&state!="filmler"&&state!="dagitim") { 
      closeAllMenus(); 
      state = "anasayfa"; 
      traceState(); 

      anasayfaButton.gotoAndStop(2); 

      TweenLite.to(hakkimizdaButton, 1, {y:hakkimizdaButton.y+200 }); 
      TweenLite.to(filmlerButton, 1, {y:filmlerButton.y+200 }); 
      TweenLite.to(dagitimButton, 1, {y:dagitimButton.y+200 }); 
     }else { 
      state = " "; 
      traceState(); 

      closeAllMenus(); 
     } 
    } 

    private function closeAllMenus() { 
     TweenLite.to(hakkimizdaButton, 1, {y:HAKKIMIZDA_ORIGINAL_Y }); 
     TweenLite.to(filmlerButton, 1, {y:FILMLER_ORIGINAL_Y }); 
     TweenLite.to(dagitimButton, 1, { y:DAGITIM_ORIGINAL_Y }); 

     anasayfaButton.gotoAndStop(1); 
     hakkimizdaButton.gotoAndStop(1); 
     filmlerButton.gotoAndStop(1); 
     dagitimButton.gotoAndStop(1); 

     //NEED TO REMOVE OBJECT HERE 
     //BUT THIS FUNCTION GETS CALLED A LOT 
     //SO I NEED TO CHECK IF THE OBJECT EXISTS 
     //BEFORE TRYING TO REMOVE TO AVOID AN NULL 
     //OBJECT REFERENCE SO I DO: 
     if (getChildByName(filmleralt.name) != null) { 
      removeFilmleralt(); 
     } 

    } 

    private function removeFilmleralt() { 
     Main.instance.narfilm.mainmenu.removeChild(filmleralt); 
    } 

    private function traceState() { 
     trace("current state is: "+state); 
    } 

    public function repos():void    //call on stage resize so it aligns to left babs 
    { 
     x = Main.instance.canvaswidth; 
    } 

} 
}

重要组成部分：

//NEED TO REMOVE OBJECT HERE 
    //BUT THIS FUNCTION GETS CALLED A LOT 
    //SO I NEED TO CHECK IF THE OBJECT EXISTS 
    //BEFORE TRYING TO REMOVE TO AVOID AN NULL 
    //OBJECT REFERENCE SO I DO: 
    if (getChildByName(filmleralt.name) != null) { 
     removeFilmleralt(); 
    }

这就是我得到的空对象引用错误的部分。

我错过了什么？

来源

2011-06-25 user813887

嗯，我猜实际的错误发生在函数removeFilmleralt（）。而sicne您尝试在同一个类中提到的功能删除实例时初始化（并有范围filmleralt）U不需要：

Main.instance.narfilm.mainmenu.removeChild(filmleralt);

只是简单removeChild(filmleralt);将做的工作。我猜“主要”对象实际上是导致错误，这是不是在任何地方初始化，并没有范围。

尝试在设置中使用“允许调试”，这样您就可以准确知道发生了哪条线路错误。但是不要忘了在发布时禁用这个选项，因为垃圾收集。

来源

2011-06-25 18:51:08 Urosan

AS3 removeChild之错误

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