I am starting with as3, but i find some error in program popping up.
My as3 program:
var a:Array=new Array();
var i:int;
for(i=1;i<=3;i++){
var k:Hello = new Hello(i);
a.push(k);
}
for(i=0;i<a.length;i++){
a[i].x=i*100;
trace(a[i].age);
addChild(a[i]);
}
and my as program :
package{
import flash.display.MovieClip;
import flash.display.stage;
public class Hello extends MovieClip{
public var age:int;
public function Hello(i:int){
this.age=m;
}
}
}
You assigned m variable to age. What is m? You should write this.age=i;.
public function Hello(i:int){
this.age=m;
}
And remove import flash.display.stage;.
Related
I a document class (Main) and a class connected to a symbol (MainMenu), and I get an error I just can't figure how to solve.. I get this error:
1136: Incorrect number of arguments. Expected 1.
it is reffering to "public var mainMenu = new MainMenu();" in my document class.
Anyways, here are my classes:
Main(document class):
package {
import flash.display.MovieClip;
import flash.events.Event;
import flash.display.Stage;
public class Main extends MovieClip {
public var mainMenu = new MainMenu();
public function Main() {
// constructor code
startGame();
}
public function startGame(){
addChild(mainMenu);
}
public function initGame(event){
//Adding player and such..
}
}
}
MainMenu:
package {
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;
public class MainMenu extends MovieClip {
private var logo = new Logo();
public function MainMenu(main:Main) {
// constructor code
mainMenu = new MainMenu(this);
logo.addEventListener(MouseEvent.CLICK, main.initGame);
placeButtons(event);
}
public function placeButtons(event:Event){
logo.addEventListener(MouseEvent.CLICK, initGame);
logo.x = - logo.width/2;
logo.y = 50;
addChild(logo);
trace ("MainMenu added");
}
}
}
Thanks
A few pointers...
Be mindful of your indentation.
Datatype your variables, arguments, and function returns.
Your MainMenu class was self instantiating itself (that's an infinite loop)
If you really need direct access to another classes function, consider making the child class extend the parent class. Alternatively, you could make the specific function a static function and call the function directly off the class without passing variable references. For example: Main.initGame()
Here are your classes, with a potential solution...
Main:
package {
import flash.display.MovieClip;
import flash.events.Event;
import flash.display.Stage;
public class Main extends MovieClip {
public var mainMenu:MainMenu;
public function Main() {
mainMenu = new MainMenu();
addChild(mainMenu);
}
public function initGame(e:Event):void {
//Adding player and such..
}
}
}
MainMenu:
package {
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;
public class MainMenu extends MovieClip {
private var logo:Logo;
public function MainMenu() {
// Wait for it to be added to the parent.
logo = new Logo();
addChild(logo);
addEventListener(Event.ADDED_TO_STAGE, placeButton);
}
private function placeButton(e:Event):void {
// We only need this to happen once, so remove the listener
removeEventListener(Event.ADDED_TO_STAGE, placeButton);
// Now that we've formed the connection, we can reference the function dynamically
logo.addEventListener(MouseEvent.CLICK, this["parent"].initGame);
logo.x = - logo.width/2;
logo.y = 50;
}
}
}
I've left the structure as similar to your original intent as possible, but the above function reference is poor form. As a general rule, children should not have connections to their parents as it's a potential memory leak. You might instead add the event listener from your Main class.
package{
import flash.display.MovieClip;
import flash.utils.Timer;
import flash.events.TimerEvent;
import flash.events.MouseEvent;
public class Main extends MovieClip{
public var ability1,ability3:Ability;
public function Main(){
var ability1 = new Ability(30,30,"Ability Name","...",5,false);
addChild(ability1);
var ability2 = new Ability(60,30,"Ability Name2","...",3,false);
addChild(ability2);
var ability3 = new Ability(45,60,"Ability Name3","...",5,true);
addChild(ability3);
stage.addEventListener(MouseEvent.CLICK, Check);
trace(ability1.Points); //outputs the value
}
public function Check(event:MouseEvent):void{
trace(ability1.Points); //outputs error
}
}}
Second trace gives this error:"TypeError: Error #1010: A term is undefined and has no properties. at Main/Check()" Can you point me out at least?
Thanks.
By using the var statement in your Main method, you're assigning the instances to local variables which are only scoped within that method. Update your code as follows and you should get the results you expect:
package{
import flash.display.MovieClip;
import flash.utils.Timer;
import flash.events.TimerEvent;
import flash.events.MouseEvent;
public class Main extends MovieClip{
public var ability1:Ability;
public var ability3:Ability;
public function Main(){
// I'm a local property scoped only to this method
var ability2 = new Ability(60,30,"Ability Name2","...",3,false);
addChild(ability2);
// We're instance properties and can be accessed from any method
// in the class (and from outside the class as well)
ability1 = new Ability(30,30,"Ability Name","...",5,false);
addChild(ability1);
ability3 = new Ability(45,60,"Ability Name3","...",5,true);
addChild(ability3);
stage.addEventListener(MouseEvent.CLICK, Check);
trace(ability1.Points); //outputs the value
}
public function Check(event:MouseEvent):void{
trace(ability1.Points); //outputs the value
trace(ability3.Points); //outputs the other value
}
}
}
I recently discovered the custom classes in actionscript 3. I started using them in my latest project but I find it hard to bend my brain around how it all works.
I created two different classes to test.
One is an extended movieclip called "Persoon" and the other is an extended simplebutton called "SpeakerBtn".
package {
import flash.display.Sprite;
public class Persoon extends Sprite {
public function Persoon(xPos:Number, yPos:Number, naam:String) {
var persoon:Sprite = new Sprite;
persoon.graphics.beginFill(0x000000,1);
persoon.graphics.drawCircle(xPos, yPos, 2);
persoon.graphics.endFill();
this.addChild(persoon);
trace ("hij heet " + naam);
}
}
}
package {
import flash.display.SimpleButton;
import flash.events.MouseEvent;
import flash.media.Sound;
import flash.media.SoundChannel;
public class SpeakerBtn extends SimpleButton {
public var snd:Sound;
public var cnl:SoundChannel = new SoundChannel();
public function SpeakerBtn(xp:Number,yp:Number,naam:String) {
var speaker:SimpleButton = new SimpleButton();
speaker.name = naam;
speaker.x = xp;
speaker.y = yp;
speaker.addEventListener(MouseEvent.CLICK, playSnd);
//this.addChild(speaker);
}
public function playSnd (event:MouseEvent) : void {
trace ("ping");
}
}
}
Then I have my main:
package {
import flash.display.MovieClip;
import SpeakerBtn;
import flash.display.SimpleButton;
import Persoon;
public class Main extends MovieClip {
var sp:SpeakerBtn;
var ps:Persoon;
public function Main() {
sp = new SpeakerBtn(50,50,"donna");
addChild(sp);
ps = new Persoon(300,300,"wilf");
addChild(ps);
}
}
}
Persoon wilf works like I expected, displays fine and traces correctly.
SpeakerBtn donna does not display and does not trace correctly. I commented out the addChild in the SpeakerBtn package because if I turn it on, I get the error 1061: Call to a possibly undefined method addChild through a reference with static type SpeakerBtn
I noticed that when I define the x and the y and addChild in Main for the speakerBtn it does work. But I don't want to have to define all that in Main, I want my SpeakerBtn to do all that.
I checked this question but it does not provide me with an answer. Can someone explain to me what is happening, or alternatively link me to a comprehensible tutorial (one not too heavy on techspeak, more like an explain-it-to-me-like-I'm-5-years-old)? Thanks!
Update
I forgot to add a button with the class SpeakerBtn to my library, so there was nothing to display. Fixed that now, and with this code the button does appear on the stage, only the x and y values are not registered and it appears on 0,0. Also, the event playSnd does not trigger the trace and I assume is not working.
Solution
With help of Cherniv's information I came to the following solution for my SpeakerBtn.
Main does this:
package {
import flash.display.MovieClip;
import SpeakerBtn;
import flash.display.SimpleButton;
public class Main extends MovieClip {
var sp:SpeakerBtn;
public function Main() {
sp = new SpeakerBtn("donna", 300, 50);
addChild(sp);
}
}
}
And SpeakerBtn does this:
package {
import flash.display.SimpleButton;
import flash.events.MouseEvent;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.display.Sprite;
import flash.events.Event;
import flash.net.URLRequest;
public class SpeakerBtn extends SimpleButton {
private var snd:Sound;
private var cnl:SoundChannel = new SoundChannel();
private var _naam:String;
private var _x:Number;
private var _y:Number;
public function SpeakerBtn(naam:String, xp:Number, yp:Number) {
_naam = naam;
_x = xp;
_y = yp;
addEventListener(Event.ADDED_TO_STAGE, addBtn);
}
private function addBtn (event:Event) : void {
this.x = _x;
this.y = _y;
this.name = _naam;
snd = new Sound(new URLRequest("mp3/" + _naam + ".mp3"));
addEventListener(MouseEvent.CLICK, playSnd);
}
private function playSnd (event:MouseEvent) : void {
cnl = snd.play();
}
}
}
So what I did was add an EventListener for when the button was added to the stage and then set all the variables like x-position, y-position and name.
That's because of inheritance. Your SpeakerBtn doesn't inherits the addChild method from his ancestors , because as we can see in SimpleButton's documentation it is inheritor of DisplayObject and not of DisplayObjectContainer , which do have a addChild method and passes it to all his inheritors including MovieClip and Persoon.
Using Flash Professional CS5, I'm trying to add a child object in my script. I want to give the class which creates the child-object as parameter while creating. The problem is when I try to test the project, I get an error stating Incorrect number of arguments. 0 expected.
My MainClass.as:
package {
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
public class MainClass extends MovieClip {
var menuClass:MenuClass;
var gameClass:GameClass;
var highClass:HighscoreClass;
public function Main() {
this.StartOfProject();
}
public function StartOfProject() {
menuClass = new MenuClass(this);
this.addChild(menuClass);
highClass = new HighscoreClass();
}
And my MenuClass.as:
package {
public class MenuClass extends MovieClip {
var mainClass:MainClass;
public function Menu(mainClass:MainClass) {
this.mainClass = mainClass;
...
}
What am I doing wrong?
You named the constructor of your MenuClass incorrectly. It should be "MenuClass" not "Menu"
change:
public function Main() {
this.StartOfProject();
}
to:
public function MainClass() {
this.StartOfProject();
}
and:
public function Menu(mainClass:MainClass)
to: public function MenuClass (mainClass:MainClass)
and see if this already solves your problem
I am finding it hard to fugure out the reference system in AS 3.0.
this is the code i have (i have trimmed it down in order to find the problem but to no avail)
package rpflash.ui {
import flash.display.Sprite;
import flash.display.MovieClip;
import flash.display.Stage;
import nowplaying;
import flash.text.TextField;
public class RPUserInterface extends Sprite{
var np:nowplaying;
public function RPUserInterface(){
}
public function init(){
var np:nowplaying = new nowplaying();
this.addChild(np)
}
public function updateplayer(xml:XML){
var artist: String = xml.nowplaying.artist.toString();
var title: String = xml.nowplaying.title.toString();
trace("UI:update");
trace(this.np);// this gives me a null reference
}
}
}
and still i cannot access np!!! trace this.np gives me a null reference. i am not even trying to access it from a subling class. (btw i def want to know how to do that as well.)
In your init() function, you are instantiating a local variable called np. Try this instead:
public function init() {
// var np:nowplaying = new nowplaying();
np = new nowplaying();
this.addChild(np);
}
Also, make sure init() is getting called before updateplayer(). Hope that helps.