Writing an 'if' statement in ActionScript - actionscript-3

Question

Is there a way of writing an if statement that involves the following?
if (MovieClip1 reaches last frame)
{
addChild(MovieClip2)
removeChild(MovieClip1)
}
Basically, all I want to happen is when my MovieClip finishes, it will change to another MovieClip or image. I know it is probably very simple, but how can I do it?

Answer 1

All code runs on command. So your conditional will run immediately and never run again.
Instead, you use events. You attach a listener to an event and when that event fires (is "dispatched" to use correct vocabulary), your code is called again.
var movieClip:MovieClip = new MovieClip();
movieClip.addEventLister( Event.ENTER_FRAME, this.enterFrameHandler ); //will be called on every frame enter
function enterFrameHandler( e:Event ):void {
if ( movieClip.currentFrame == movieClip.totalFrames ) {
// do something
}
}
So you listen for each new frame and in that handler, you check if it is the last frame or not.
As an extra tidbit, the standard naming convention for AS3 is to use lowercase, camelcase (thisIsAnExampleOfthat) for all objects. Package names should be in all lowercase and only Class names should be capitalized.

Answer 2

package
{
import flash.display.MovieClip;
import flash.events.KeyboardEvent;
import flash.events.Event;
public class Main extends MovieClip
{
var firstScene:FirstScene = new FirstScene;
var movement:Movement = new Movement;
var green:Green = new Green;
public function Main()
{
addChild(firstScene);
firstScene.addEventListener(KeyboardEvent.KEY_DOWN, mClick);
movement.addEventListener(Event.ENTER_FRAME, endChange);
}
function mClick(event:KeyboardEvent):void
{
if (event.keyCode == 77);
{
addChild(movement);
removeChild(firstScene);
}
}
function endChange(event:Event):void
{
if (movement.currentFrame == movement.totalFrames)
{
addChild(green);
removeChild(movement);
}
}
}
}