錯誤使用數組更改動畫片段的x和y位置

Question

我試圖創建一個使用動作腳本3.0的程序，其中單擊一個元素，單擊另一個元素，第一個元素轉到第二個元素。

這是我的代碼：

import flash.display.MovieClip; 
import flash.display.SimpleButton; 
import flash.display.MovieClip; 
import flash.events.MouseEvent; 

stop(); 

var Plchange:MovieClip; 
var As:Array = new Array(A1,A2,A3,A4,A5,A6,A7,A8,A9); 
var Bs:Array = new Array(B1,B2,B3,B4,B5,B6,B7,B8,B9); 
var Cs:Array =new Array(C1,C2,C3,C4,C5,C6,C7,C8,C9,C10,C11,C12); 
var Cs1:Array=new Array(C13,C14,C15,C16,C17,C18,C19,C20,C21,C22,C23,C24); 

for (var i:int =0; i<=8 ;i++) 
{ 
As[i].addEventListener(MouseEvent.CLICK, function(me:MouseEvent):void{ gotoPlace(me, As[i])}); 
Bs[i].addEventListener(MouseEvent.CLICK, function(me:MouseEvent):void{ gotoPlace(me, Bs[i])}); 


} 
for (var Y:int =0; i<=12 ;Y++) 
{ 
Cs[Y].addEventListener(MouseEvent.CLICK, function(me:MouseEvent):void{ Set(me, Cs[Y])}); 
Cs1[Y].addEventListener(MouseEvent.CLICK, function(me:MouseEvent):void{ Set(me,  Cs1[Y])}); 
} 
function gotoPlace(event:MouseEvent, boing:MovieClip) 
{ 
boing = Plchange; 
} 
function Set(event:MouseEvent, clip:MovieClip) 
{ 
Plchange.x = clip.x; 
Plchange.y = clip.y; 
} 

我得到一個錯誤：

TypeError: Error #1010: A term is undefined and has no properties. at NineMen_fla::MainTimeline/frame1()

我要去哪裏錯了？請告訴我。

Answer 1

首先，在gotoPlace中，您應該輸入Plchange = boing;而不是反之。其次，你必須檢查Plchange是否在函數Set()內被分配了一個值。像這樣：

var Plchange:MovieClip=null; 
function gotoPlace(event:MouseEvent, boing:MovieClip) 
{ 
    Plchange = boing; 
} 
function Set(event:MouseEvent, clip:MovieClip) 
{ 
    if (!Plchange) return; // Plchange is not assigned 
    Plchange.x = clip.x; 
    Plchange.y = clip.y; 
}