How to Make a Efficient Flash AS3 SWF content Loader[Preloader]

Very efficient Loader Coding Tutorial

the code using here is very clean , simple and error less . you can load external swf file and call function in that swf file

step 1 : Create Loader.fla and LoaderClass.as

open Loader.fla go to properties type “LoaderClass” class : filed under PUBLISH tab

step 2 : Make a preloader movie

click on rectangle tool or ®

then draw a reactangle width : 300px & height :10px , color :#63F262

after that right click on the rectangle and convert to symbol, when convert to symbol window popup type the (1)Name : mc , (2)Type : Movie Clip , (3)Registeration : Left-center

then name the MoviClip “mc” on properties tab

again right click on the rectangle and convert to symbol, when convert to symbol window popup type the (1)Name : preloader_mc , (2)Type : Movie Clip , (3)Registeration : center , (4)tick Export for ActionScript under Linkage tab

double click on the preloader_mc and create a dynamic text field and name “percent_txt”

then click on Character Embedding and in the include these characters: type “0123456789%”

it will look like this

step 3: Make Preloader Animation

double click on the preloader_mc and insert a frame at 100

then create a motion tween on “mc” rectangle

insert a scale KeyFrame at 100th frame

set width = 1 at first Frame

come to root of the Scene delete the preloader_mc Movie Clip

and save your file

step 4: Write Preloader Class

open LoaderClass.as

^?View Code ACTIONSCRIPT

package {
 
	//import needed classes
 
	import flash.display.*;
	import flash.events.*;
	import flash.filters.*;
	import flash.geom.*;
	import flash.net.*;
	import flash.system.*;
 
	dynamic public class LoaderClass extends MovieClip // main class
	{
 
		//declare private variables
 
		private var PRELOADER:preloader_mc= new preloader_mc();
		private var URL_:URLRequest;
		private var OBJLoader:Loader;
		private var isLoaded:Boolean;
		private var TOTAL_:Number;
		private var LOADED_:Number;
		private var isLoadedInited:Boolean;
 
		public function LoaderClass() {//main function
			stage.align = StageAlign.TOP_LEFT;
			stage.scaleMode = StageScaleMode.NO_SCALE;
			init();
		}
 
		public function init():void {
			PRELOADER.x = stage.stageWidth / 2;
			PRELOADER.y = stage.stageHeight / 2;
			addChild(PRELOADER);
			LoadContent(null);
			stage.addEventListener(Event.RESIZE,onResize);
		}
 
		public function LoadContent(URLReq:URLRequest) {
			if (URLReq == null) {
				URL_ = new URLRequest("swfContent.swf");
			} else {
				URL_ = URLReq;
			}
			OBJLoader = new Loader();
			OBJLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, loaded);
			OBJLoader.load(URL_);
			addChild(OBJLoader);
			addEventListener(Event.ENTER_FRAME, onLoading);
		}
		public function loaded(param1:Event):void {
			isLoaded = true;
			return;
		}
		public function onLoading(e:Event) {
			TOTAL_ = OBJLoader.contentLoaderInfo.bytesTotal;
			LOADED_ = OBJLoader.contentLoaderInfo.bytesLoaded;
			var percent:Number = int(LOADED_ / TOTAL_ * 100);
			PRELOADER.gotoAndStop(percent);
			PRELOADER.percent_txt.text = percent + "%";
			if (! isLoadedInited &amp;&amp; isLoaded) {
				isLoadedInited = true;
				var LoaderData:* = OBJLoader.content;
				LoaderData["loadData"](this);
			}
			if (TOTAL_ / LOADED_ == 1) {
				removeEventListener(Event.ENTER_FRAME,onLoading);
				removeChild(PRELOADER);
				stage.removeEventListener(Event.RESIZE,onResize);
				trace("content Loaded");
			}
 
			return;
		}
 
		public function onResize(e:Event) {
 
			PRELOADER.x = stage.stageWidth / 2;
			PRELOADER.y = stage.stageHeight / 2;
 
		}
 
	}
 
}

Source File :AS3 SWF Content Loading method-Source (71)

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Action, Action Script, Action Script3, Adobe Flash, AS3, Flash external function caller, flash preloader, swf loader

This entry was posted on Friday, July 3rd, 2009 and is filed under ActionScript 3. You can follow any responses to this entry through RSS 2.0. You can leave a response, or trackback from your own site.