在容器中加入和移除元素

 

    <fx:Script>
        <![CDATA[
            import mx.core.IVisualElement;
            
            import spark.components.Button;
            private function getNewElement():IVisualElement
            {
                var btn:spark.components.Button = new spark.components.Button();
                btn.label = "button " + myContent.numElements;
                return btn;
            }
            private function AddElement(i:int):void
            {
                myContent.addElementAt( getNewElement(), i);
            }
            
            private function RemoveElement(i:int):void
            {
                if( myContent.numElements > 0 )
                {
                    myContent.removeElementAt(i);
                }
            }
            
        ]]>
    </fx:Script>
    <s:layout>
        <s:VerticalLayout />
    </s:layout>
    <s:Button label="addElement" click="AddElement(0);" />
    <s:Button label="removeElement" click="RemoveElement(0);" />
    <s:Group id="myContent">
        <s:layout>
            <s:VerticalLayout />
        </s:layout>
    </s:Group>