將簡單的Flash AS2代碼轉換爲AS3

Question

我是Flash初學者，並遵循教程：http://www.webwasp.co.uk/tutorials/018/tutorial.php ...瞭解如何進行「實時繪製/繪製」效果。我沒有意識到，如果我在AS2中創建了一些東西，我將無法將它嵌入（並使其工作）到我的根AS3文件中，在那裏我還有其他一些東西在進行。我已經嘗試瞭如何將AS2代碼更改爲AS3的提示，但它不起作用。我知道這是簡單的代碼，並且那裏有一些天才可以弄清楚，但我很茫然。請幫忙！

這裏的AS2代碼：

_root.createEmptyMovieClip("myLine", 0); 

_root.onMouseDown = function() { 
    myLine.moveTo(_xmouse, _ymouse); 
    ranWidth = Math.round((Math.random() * 10)+2); 
    myLine.lineStyle(ranWidth, 0xff0000, 100); 
    _root.onMouseMove = function() { 
     myLine.lineTo(_xmouse, _ymouse); 
    } 
} 

_root.onMouseUp = function() { 
    _root.onMouseMove = noLine; 
} 

Answer 1

這裏是AS3

import flash.display.Sprite; 
import flash.events.MouseEvent; 

var ranWidth:Number; 

//creation of a new clip (Sprite is the base class of MovieClip, 
//it's the same without the unneeded timeline) 
var myLine:Sprite = new Sprite(); 
addChild(myLine); 

//in AS3 the main container is stage, not _root 
//you see here the main difference between beginner AS3 and beginner AS2: 
//event listeners 
stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown); 


function onMouseDown(event:MouseEvent):void 
{ 
    myLine.graphics.moveTo(mouseX, mouseY); 
    ranWidth = Math.round((Math.random() * 10)+2); 
    myLine.graphics.lineStyle(ranWidth, 0xff0000, 100); 
    stage.addEventListener(MouseEvent.MOUSE_MOVE, onMouseMove); 
    stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUp); 
} 

//nesting function in other functions is not a good practice 
function onMouseMove(event:MouseEvent):void 
{ 
    myLine.graphics.lineTo(mouseX, mouseY); 
} 

function onMouseUp(event:MouseEvent):void 
{ 
    stage.removeEventListener(MouseEvent.MOUSE_MOVE, onMouseMove); 
    stage.removeEventListener(MouseEvent.MOUSE_UP, onMouseUp); 
}