在flex页面里画圆

 

var s:UIComponent=new UIComponent();
    s.graphics.beginFill(0x0000ff, 100);
    s.graphics.drawCircle(100,100,40);
    s.graphics.endFill();
    this.addChild(s);

 

在类里边写时

框架：

package myComponents
{
public class MyComponent extends UIComponent
{   
....
}
}

详细内容

// Declare two variables for the component children.
private var text_mc:TextArea;
private var mode_mc:Button;

override protected function createChildren():void {

    // Call the createChildren() method of the superclass.
    super.createChildren();
       
    // Test for the existence of the children before creating them.
    // This is optional, but do this so a subclass can create a different
    // child.
    if (!text_mc)     {
        text_mc = new TextArea();
        text_mc.explicitWidth = 80;
        text_mc.editable = false;
        text_mc.addEventListener("change", handleChangeEvent);
        // Add the child component to the custom component.
        addChild(text_mc);
    }

    // Test for the existence of the children before creating them.
    if (!mode_mc)     {   
        mode_mc = new Button();
        mode_mc.label = "Toggle Editing";
        mode_mc.addEventListener("click", handleClickEvent);
        // Add the child component to the custom component.
        addChild(mode_mc);
    }
}

理解加粗部分的重要性。