如何使用 actionscript 3.0 在 flash cs5.5 中创建 bmi 计算器？

Question

I'm not very familiar with flash so this is my current problem to deal with. I've found some code but it's in actionscript 2.0 , when i tried to run it in my project, it shows the following error.

Here are my errors: 1. Scene 1, Layer 'Layer 2', Frame 1, Line 6

1067: Implicit coercion of a value of type Number to an unrelated type flash.text:TextField.

2. Scene 1, Layer 'Layer 2', Frame 1, Line 8

1180: Call to a possibly undefined method on.

3. Scene 1, Layer 'Layer 2', Frame 1, Line 8

1120: Access of undefined property release.

var weight_BMI;
var height_BMI;
var BMI_FINAL; 
total_BMI=Number(weight_BMI.text)/(Number(height_BMI.text)*Number(height_BMI.text));

on(release){
    trace(weight_BMI.text)
    trace(height_BMI.text)
    trace(BMI_FINAL)
}

Answer 1

AS2 is very different from AS3 . AS3 works by using methods (in the same way as Java , for example). See the code below as an example (note, you may need to edit/rename your fields to get it to compile)

It works by attaching a Click EventListener to your calculate button which when triggered it runs the calculateBMI method. This method then performs the calculation and prints the result to your text field.

var myBmi:TextField;
var total_BMI:Number;    

function calculateBMI(e:MouseEvent):void
{
    total_BMI = Number(weight_BMI.text)/(Number(height_BMI.text)*Number(height_BMI.text));  
    myBmi.text = String(total_BMI);
}

btnCalculate.addEventListener(MouseEvent.CLICK, calculateBMI);