Using "this" - or not? Accessing properties of a member of a class from within the class.

Question

I have a class, call it MyClass, and there are several variables that I need to be able to access each instance of from within the class.

So for instance, I need the object myObject1, a member of MyClass, to store the variable myNumber.

From the main timeline, if I trace myObject1.myNumber, I get whatever number I've stored.

However, I need to check the numbers against another parameter, so I need to be able to test if myObject.myNumber == myOtherNumber. But from within the class, if I trace this.myNumber or myNumber I get null.

What is the proper syntax for accessing a variable within a class?

kglad · Accepted Answer

look for a timing issue, where you're trying to access the variable in your class before it's defined (on the main timeline). the following would be a typical error:

var yc:YourClass=new YourClass();

yc.var1="HI";

///////////

package{

import...

public class YourClass...

.

public function YourClass(){

//any attempt to access this.var1 here (the constructor) will fail

}

Ambari · Answer

After some more testing it doesn't look like it's the accessing of the variables but rather when I set them in the first place.

In the main timeline, if I do a trace (myObject.myNumber) it will return myNumber. Within the class, if I do a trace of (this.myNumber) it returns null.

However, if I add a line of code in my class and add this.myNumber = 3, then trace (this.myNumber) traces 3.

So it's obviously not the "this." that's the problem. Somehow my declaration in the maintime of myObject.myNumber = 3 is not actually initializing it properly.

What am I doing wrong? Why can't I get myObject to correctly change its own parameters?

Sign up

To post, reply, or follow discussions, please sign in with your Adobe ID.

Sign in to Adobe Community

To post, reply, or follow discussions, please sign in with your Adobe ID.

Scanning file for viruses.

This file cannot be downloaded