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Kevin McGowan
Kevin McGowan

Reputation: 463

AS3 - Accessing class information through variable

At the moment I have a class that requires information from another class, but which class has to be determined at runtime based on other variables.

Effectively, I need my class BUTTON.as to be able to access GUN(1-9).as, without already knowing what number it will be.

The code that I assumed would work is this:

public function enableButton(shortcut:int):void{
        trace(ID)
        dtf_ammo.text = gun[ID].ammo
        refreshThis(shortcut, true)
        this.alpha = 1
        isActive = true
    }

ID is the number of the class (in this case, gun1).

The following does work:

public function enableButton(shortcut:int):void{
        trace(ID)
        dtf_ammo.text = gun1.ammo
        refreshThis(shortcut, true)
        this.alpha = 1
        isActive = true
    }

However, as there are 9 guns and only 1 class for the button I need to be able to use this ID variable to access functions within.

Is this possible, and if not is there a way to do what I'm trying to do here?

Upvotes: 0

Views: 327

Answers (2)

Vishwas
Vishwas

Reputation: 1541

You said the 2nd block of code is working. So if you create and array say 

 var gun:Array = new Array( gun1, gun2,gun3,gun4,gun5,gun6,gun7,gun8,gun9 )
 //gun1 to gun9 , being the instances of the Gun class
public function enableButton(shortcut:int):void{
        trace(ID)
        dtf_ammo.text = gun[ID].ammo
        refreshThis(shortcut, true)
        this.alpha = 1
        isActive = true
    }

So, the function enableButton would work fine.

Upvotes: 0

Sam DeHaan
Sam DeHaan

Reputation: 10325

In order to access static properties of a class whose name is only known at runtime, you can use the following code.

getDefinitionByName("gun" + i).ammo

getDefinitionByName returns the Class object representing the class named by the String passed in. That Class object contains references to all of the static properties of the class.

Upvotes: 1

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