AS3 iOS 'catch'/'recognise' that user pressed return key on the soft keyboard

Question

I was trying to find a solution online but couldn't find a proper answer. Does anyone know how to 'catch'/'recognise' that user pressed return key on the soft keyboard (iOS)? And how to check if the input equals to eg correct answer?

Thanks a lot.

My code:

nt = new NativeText(1);
            this.nt = nt;
            this.nt.returnKeyLabel = ReturnKeyLabel.DONE;
            this.nt.autoCorrect = true;
            this.nt.fontSize = 40;
            this.nt.borderThickness = 1;
            this.nt.fontFamily = "Arial";
            this.nt.text = "pica";
            this.nt.color = 0xFFFFFF;
            this.nt.borderColor = 0xFFFFFF;
            this.nt.width = 500;
            this.nt.x = 70;
            this.nt.y = 70;

            LEVEL_02_STAGE.addChild(this.nt);

Answer 1

You can't pull much data from user keystrokes in iOS. But you can pull the enter command from the KeyboardEvent if the keycode is 13.

So if you had a text input already defined as 'var textfield:Textfield;'

textfield.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDownPress);

function onKeyDownPress(e:KeyboardEvent):void
{
    if (e.keyCode == 13)
    {
        // Return key (done in iOS is pressed)
        if (textfield.text == "equalstothisstring")
        {
             trace("The input is valid and equals to 'equalstothisstring'");
        }
    }
}

Answer 2

I want to point out something misleading in this post.

on iOS, Return is not the same thing as Enter.

If you make a multiline textfield, give it focus, thekeyboard will say "Return" instead of "Done".... the keyboard event will only fire for "Done" and NOT for "Return"...