从阶段访问文档类

Question

I could not find a specific solution to my problem. I start my document class "Main.as". From that I play Frame 1, which is my GUI. After I press the "start" Button on my GUI, I want it to call the "Start()" function in my Main.as.

But it just won't work. I found out that I cannot create Objects from my document class, also I can't have more than 1 document class. So what can I do?

Main.as

import flash.events.KeyboardEvent;
import flash.events.MouseEvent;
import flash.display.MovieClip;
import flash.events.Event;
import flash.ui.Keyboard;



public class Main extends MovieClip 
{
trace("Im the Main Class");
public var BG:MovieClip;
public var char:Char_Control;
public var enemy:Enemy;
var blockSlide:Boolean = true;
var coin_array:Array = new Array();
var char_array:Array = new Array();
var coin:item_collider;
var posx;
var posy;
var oCollider;
var main:Main = new Main();


    //Konstruktor
    public function Main() 
    {
    trace("Im the Main Class(Constructor)");
    this.stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPressed);
    this.stage.addEventListener(KeyboardEvent.KEY_UP, keyReleased);
    this.addEventListener(Event.ENTER_FRAME, Gravity);
    this.addEventListener(Event.ENTER_FRAME,update);
    gotoAndPlay(1); // Starts GUI
    Start(); // Starts Everything else => The Game itself
    }



public function update(_event:Event)
{
    //Execute Base_Class
    //char.Move();

    //Execute Base_Class+Sub_Class
    enemy.Chase(char,enemy);
    //enemy.Move(true, "walk");
}




public function Start()
{
    // Adds Character to Stage
     char = new Char_Control(875,350);
     stage.addChild(char);

     enemy = new Enemy(500,450);
     stage.addChild(enemy);

     char_array[1]=char;
     char_array[0]=enemy;

    // Adds Objects to Stage
    for (var i2:int=1; i2<30; i2++)
     {
     posx = Math.round(Math.random()*(1400)+1);
     posy = Math.round(Math.random()*(800)+1);
     coin = new item_collider(posx,posy);// Öffnet Konstruktor
     stage.addChild(coin);
     trace("Add Coin (foreach)");
     coin_array.push(coin);
     }
}

stage:

button.addEventListener(MouseEvent.CLICK,buttonClick);

var tform:TextFormat = new TextFormat();
tform.size = 20;
tform.font = "Arial";
tform.align = TextFormatAlign.CENTER;
tform.color = 0x000000;
tform.bold = true;

var tfield:TextField = new TextField();
tfield.width = checkbox.width;
tfield.width = button.width;
tfield.width = coin_number.width;
tfield.width = stepper_label.width;
tfield.x = 0;
tfield.y = 30;

var coin_amount:int = 0;
var create_enemy:Boolean = false;

tfield.setTextFormat(tform);
addChild(tfield);

checkbox.setStyle("textFormat",tform);
button.setStyle("textFormat",tform);
coin_number.setStyle("textFormat",tform);
stepper_label.setStyle("textFormat",tform);





stop();
function buttonClick(e:MouseEvent) 
        { 
        coin_amount = coin_number.value;
        create_enemy = checkbox.selected;
        nextFrame(); //Next Frame => the Level itself
    }

Answer 1

After downloading your code, I notice that there are a few compatibility issues with the way you've set up your timeline code and the code intended to be the Document Class.

Although you have "Automatically declare stage instances" unchecked in your AS3.0 settings, you appear to have a mix of implicitly-declared and explicitly-declared instances on the stage. To resolve this, I would suggest leaving this property unchecked and declaring all stage instances in your Document Class (this includes anything you have on the stage in frame 1 as well: coin_number , checkbox , etc).

Doing this will also require you to import any classes you are using (ie NumericStepper , TextField , TextFormat , etc).

Once you have done this, you'll want to move the game control event listeners (the ones you have in your Document Class constructor). You can place these either in a separate method or add them to the end of your Start method. If you leave them in the constructor, you'll be attempting to access something that does yet exist because your update method that is called on ENTER_FRAME relies on objects that get instantiated in the Start method.

The next step is to not call Start from your constructor. Instead, place a call to Start on your second frame.

This should get your application to a runnable state using a mix of timeline code and a Document Class.

I would like to know why this is a requirement for a good grade as this is highly unorthodox and--for the most part--looked down upon in the ActionScript community.