Remove all elements

           
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:s="library://ns.adobe.com/flex/spark">
    <mx:Script>
        
            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 addLastElement():void
            {
                myContent.addElement( getNewElement() );
            }
            
            private function removeFirstElement():void
            {
                if( myContent.numElements > 0 )
                    myContent.removeElement( myContent.getElementAt( 0 ) );
            }
            
      
    </mx:Script>
    <mx:Button label="addLast" click="addLastElement();" />
    <mx:Button label="removeFirst" click="removeFirstElement()" />
    <mx:Button label="removeAll" click="myContent.removeAllElements()" />
    
    <mx:VBox id="myContent">
    </mx:VBox>
    
</mx:Application>

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Remove all elements : VBox « Container « Flex

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