Load/Unload swf in AS3

[Alicee 0 Likes (Newbie)]

Dear Users, I hope you could help me about that (I look around the net but I dont get the informations I need.) I have a (AS3) swf it is palced in a html file than  the end of this swf I would like to load a new swf (with preloader) and unload the previous swf( as clear the memory and stop events).

What is the code with I can earn this result?

Thank you forward for your Help!

[Carl 9,066 Likes (Superhero)]

Hi and welcome to the GreenSock forums.

 

Our SWFLoader can handle this task quite easily. Have you read the documentation? 

http://api.greensock.com/as/com/greensock/loading/SWFLoader.html

 

It goes into great detail and explains the methods necessary to load(), unload() and dispose() of a swf. 

 

To figure out when the loaded swf has reached the end of the timeline you can use an ENTER_FRAME event to check if the currentFrame is equal to the totalFrames value.

 

I would suggest for your setup you have 3 swfs

 

1: The swf that does the loading, unloading and tracks the progress of the loading. This swf is embedded in the HTML page

2: the first child swf that loads

3: the second child swf that loads

 

Here is a quick sample of the code

 

 

import com.greensock.*;
import com.greensock.loading.*;
import com.greensock.events.LoaderEvent;
import flash.events.Event;


//create SWFLoaders


var swf1:SWFLoader = new SWFLoader("child1.swf",{container:this,y:100,onProgress:progressHandler,onComplete:completeHandler,autoPlay:false});
var swf2:SWFLoader = new SWFLoader("child2.swf",{container:this,y:100,onProgress:progressHandler,onComplete:completeHandler,autoPlay:false});
var currentSWFLoader:SWFLoader = swf1;


//adjust the progress bar;
function progressHandler(e:LoaderEvent):void {
    bar.scaleX = e.target.progress;
    trace(e.target.progress);
}


//tell the loaded swf to play and start tracking frames
function completeHandler(e:LoaderEvent):void {
    //the target of the LoaderEvent is the SWFLoader that fired the event
    //the rawContent is the loaded swf
    e.target.rawContent.play();
    addEventListener(Event.ENTER_FRAME, checkFrame);
}


function checkFrame(e:Event):void {
    //check to see if loaded swf is done playing
    if (currentSWFLoader.rawContent.currentFrame == currentSWFLoader.rawContent.totalFrames) {
        trace("swf done playing");
        removeEventListener(Event.ENTER_FRAME, checkFrame);


        //if the first swf is done playing load the second swf
        if (currentSWFLoader == swf1) {
            currentSWFLoader.dispose(true) // dispose and unload content
            currentSWFLoader = swf2;
            currentSWFLoader.load();
        }
    }
}


bar.scaleX = 0;
currentSWFLoader.load();
 

 

 

DEMO: http://www.snorkl.tv/dev/loaderMax/basic-load-unload.html 

Note, the progress bar works, but the files are very small and the load happens very quickly.

 

CS5 files attached

 

The following tutorials contain videos that explain the basic methods, properties and events that LoaderMax uses. Although they focus on ImageLoaders, the same concepts apply to SWFLoaders

 

http://www.snorkl.tv/2011/07/loadermax-vs-native-as3-loader-exhibit-a/

http://www.snorkl.tv/2011/08/loading-images-with-loadermax-load-and-track-the-progress-of-multiple-images/