用于初始化flash中对象的外部文件as3

Question

我是AS3编程课程的新手，我第一次使用类，我正在开发一款游戏。我的问题是我有一堆对象来启动，我不希望这在我的文档类中完成，但我不知道我是否可以使用另一个文件，以及如何在那里做所有这些。我的代码（文档类）是：

package { 

    import flash.display.MovieClip; 
    import flash.utils.getDefinitionByName; 

    public class Ingredient_game extends MovieClip { 

     //variables 
     var allFoods:Array; 


     //functions 
     public function Ingredient_game() { 
      // constructor code 
      //add an event listener to update position 
      addEventListener(Event.ENTER_FRAME, moveOnEscalator); 
      //initialise allFoods array 
      allFoods = new Array(); 
      var mc1:MovieClip = new carrot(); 
      var mc2:MovieClip = new lemon(); 
      var mc3:MovieClip = new potato(); 
      var mc4:MovieClip = new tomato(); 
      var mc5:MovieClip = new cereals(); 
      var mc6:MovieClip = new milk(); 
      var mc7:MovieClip = new yoghurt(); 
      var mc8:MovieClip = new apple(); 
      var mc9:MovieClip = new bananas(); 
      var mc10:MovieClip = new grapes(); 
      var mc11:MovieClip = new orange(); 
      var mc12:MovieClip = new pear(); 
      var mc13:MovieClip = new strawberry(); 
      var mc14:MovieClip = new watermelon(); 

      allFoods.push(mc1); 
      allFoods.push(mc2); 
      allFoods.push(mc3); 
      allFoods.push(mc4); 
      allFoods.push(mc5); 
      allFoods.push(mc6); 
      allFoods.push(mc7); 
      allFoods.push(mc8); 
      allFoods.push(mc9); 
      allFoods.push(mc10); 
      allFoods.push(mc11); 
      allFoods.push(mc12); 
      allFoods.push(mc13); 
      allFoods.push(mc14); 

      for(var i = 0; i < allFoods.length; i++){ 
       var newx:Number = 800+100*i; 
       allFoods[i].initialisePosition(newx, 500); 
       addChild(allFoods[i]); 
      } 

     } 

     function moveOnEscalator(e:Event):void{ 
      for(var i = 0; i < allFoods.length; i++){ 

       if(allFoods[i].x >= 0){ 
        allFoods[i].x -= 5; 
       } 
       else{ 
        allFoods[i].x = allFoods.length*100; 
       } 
      } 
     } 
    } 

} 

我需要的正是被放在另一个文件中的代码从var mc1到allFoods.push(mc14);别的地方！任何想法如何？

Answer 1

您可以创建一个实用工具类：

package 
{ 

    public class UtilityClass 
    { 

     public function buildMCs():Array 
     { 
      var result:Array = new Array(); 
      result.push(new carrot()); 
      result.push(new lemon()); 
      result.push(new potato()); 
      result.push(new tomato()); 
      result.push(new cereals()); 
      result.push(new milk()); 
      result.push(new yoghurt()); 
      result.push(new apple()); 
      result.push(new bananas()); 
      result.push(new grapes()); 
      result.push(new orange()); 
      result.push(new pear()); 
      result.push(new strawberry()); 
      result.push(new watermelon()); 
      return result; 
     } 
    } 
} 

，然后修改你的函数调用buildMCs（）：

public function Ingredient_game() 
{ 
    addEventListener(Event.ENTER_FRAME, moveOnEscalator); 

    //create instance of utility class 
    var builder:UtilityClass = new UtilityClass(); 
    //call buildMCs to populate array 
    allFoods = builder.buildMCs(); 

    for (var i = 0; i < allFoods.length; i++) 
    { 
     var newx:Number = 800+100*i; 
     allFoods[i].initialisePosition(newx, 500); 
     addChild(allFoods[i]); 
    } 
}