how to assign actionscript variable value to spark component in flex - actionscript-3

Question

I have a variable in actionscript. How can I set the label text with the variable value? I have the following code:
public function setObjVal(obj1:InvPrintRRTObj):void
{
obj = obj1;
var date:String = obj.receive_Date;
var yy:String = date.substring(0,3);
var mm:String = date.substring(5,6);
var dd:String = date.substring(8,9);
}
I want to assign the yy value to a spark label. Please help.
The mxml code goes here
s:Label width="35" height="25" textDecoration="none" verticalAlign="middle" text="{yy}"
sorry, i was not able to format this mxml code

Answer 1

Another way to achieve this is to access the label by id.
<s:Label
id="myLabel"
width="35"
height="25"
textDecoration="none"
verticalAlign="middle" />
Then in your function
public function setObjVal(obj1:InvPrintRRTObj):void
{
...
myLabel.text = yy;
}

Answer 2

So, the problem is that the label does not have access to the yy variable, since it is defined in the setObjVal method. There are two ways to fix this:
make the yy variable global, i.e. define it outside of the method so the label component can access it
add an id to the label (e.g. 'myLabel') and add a line to the setObjMethod which updates the label's text, like so:
myLabel.text = yy; //in this case, the label should be accessible to the method