Actionscript3.0 addChild removeChild XML

Question

我不知道是否對我的問題addChild和removeChild方法是我確切需要的，但當我在網上閱讀這是我需要的技術。

這是我的XML文件：

<projects> 
    <category name = "Branding"> 
     <project>Logo e effekt Medias1</project> 
     <project>Portali Logo1</project> 
     <project>Skena Logo1</project> 
    </category> 
    <category name = "Web"> 
     <project>Logo e effekt Medias2</project> 
     <project>Portali Logo2</project> 
     <project>Skena Logo2</project> 
    </category> 
    <category name = "Print"> 
     <project>Logo e effekt Medias3</project> 
     <project>Portali Logo3</project> 
     <project>Skena Logo3</project> 
    </category> 

從這個XML文件，首先是我創建從類別名稱屬性，並用菜單中的for循環我創建這個菜單和它看起來是這樣的：

品牌 網絡 打印

後，當我點擊讓說我品牌推廣創建另一個動畫片段，並在該動畫片段上顯示品牌下的所有項目 。直到這裏一切都很好。

當我點擊其他菜單時出現問題。比方說，我點擊了網頁，此時所有品牌項目都停留在舞臺上，並加入所有在網絡展示中的項目。這種方式我一直點擊菜單上的新數據出現。

這是最好用的技術，所以當我點擊菜單時，只有與該類別相關的數據纔會出現在舞臺上。

這裏有鏈接，如果你想檢查我的爛攤子：LINK

Answer 1

嗯，這不是真正的添加或刪除的兒童。真正的問題是關於你的發展觀點。

首先，你正在建立一個菜單，所以讓菜單就是這樣，一個對象發送信號來通知哪個按鈕被點擊。

之後，您需要某種形式的容器，當收到菜單消息時將顯示相關屏幕。

此容器可以包含三個屏幕，品牌，Web &打印。

您可以將所有這些屏幕可見屬性設置爲false。

當容器接收到菜單信息時，它將所選屏幕可見屬性設置爲true，其他屏幕設置爲false。

這樣，您不必繼續添加或刪除子項，試圖跟蹤您的DisplayList結構。

使用菜單中的事件調度。

不管怎麼說，這是一個粗略的例子，它不是完整的，但應該給你一個想法......

public class Menu extends Sprite 
{ 
    //A basic button instance 
    private var button:Sprite = new Sprite(); 

    //The dispatcher dispatches & listen to events 
    //it acts as a connector between your container 
    //and the menu 
    private var dispatcher:EventDispatcher; 

    //The menu will be created in the Container 
    //the dispatcher will be passed as a parameter 
    //this is the connection between the two classes 
    //Please note that there are other ways to achieve 
    //a similar result.. 
    public function Menu (dispatcher:EventDispatcher) 
    { 
     //assign the dispatcher instantiated in the container 
     //to a variable in order to manipulate it in this class 
     this.dispatcher = dispatcher; 

     //takes care of creating the menu 
     createMenu(); 
    } 

    private function clickHandler(event:MouseEvent):void 
    { 
     //each time a button is click an event is dispatched 
     //that contains the name of the clicked button 
     dispatcher.dispatchEvent 
       (new MenuEvent(event.currentTarget.name)); 
    } 

    private function createMenu():void 
    { 
     //here you load the XML, create the buttons 
     // and add the event listeners 

     //this is just an example for the logic 
     //it's irrelevant since the button will 
     //be created from the XML 
     button.name = "Branding"; 
      addChild(button); 
      button.addEventListener 
       (MouseEvent.CLICK , clickHandler); 
    } 
} 


public class Container extends Sprite 
{ 
    private var button:Sprite = new Sprite(); 

    //Here we instantiate a dispatcher 
    private var dispatcher:EventDispatcher = new EventDispatcher; 
    private var menu:Menu; 

    //a basic screen instance that could contain 
    //all that has to do with Branding for instance 
    private var screen1:Sprite = new Sprite(); 
    //etc... 

    public function Container() 
    { 
     //The dispatcher is set to listen to the events 
     //dispatched in the Menu class 
     dispatcher.addEventListener(MenuEvent.MENU , eventListener); 
     screen1.visible = false; 

     //now the menu can be created 
     menu = new Menu(dispatcher); 
     addChild(menu); 
    } 

    private function eventListener(event:MenuEvent):void 
    { 
     //set all the screens visibility to false 
     //here... 

     //get the event name and react accordingly 
     //here you can implement a switch 

     switch(event.name) 
     { 
      case "Branding": 
      //show Branding screen 
      screen1.visible = true; 
      break; 

      //etc... 

     }         
    } 
} 

public class MenuEvent extends Event 
{ 
    public const MENU:String = "Menu Event"; 
    public var name:String; 

    //Check custom events for the rest of the code... 
    //Do a Google search for custom events 
    //shouldn't be too difficult to find 
}