actionscript-3 - AS3 获取播放器的宽度

Question

这位于公共类中以找到播放器宽度的一半：

   public class Player extends MovieClip
{    
   private var playerHalfWidth:int = this.width/2;

我收到此错误：

1119:Access of possibly undefined property width through a 
reference with static type class

Answer 1

this您甚至在创建Player对象之前尝试引用。

将它移动到构造函数中，将是正确的方法：

public class Player extends MovieClip {

   private var playerHalfWidth:int;

   public function Player() {

     playerHalfWidth = this.width/2;
   }