如何修复Adobe Animate CC AS3中的警告1082（迁移问题）和1008？

Question

当我调试项目，我被接到222个报警，它仅包含两个警告：

Warning: 1082: Migration issue: Method %s will behave differently in ActionScript 3.0 due to the change in scoping for the this keyword. See the entry for warning 1083 for additional information. 

而另一个问题：

Warning: 1008: return value for function '%s' has no type declaration 

然后，我提供了一个screenshot of warnings。我找到了它的解决方案，尤其是我不知道什么。我读了约Warning: 1082: Migration issue，它说，从AS2导入到AS3，但在我的情况下，我从来没有使用AS2。是的，我从另一个文件导入代码，但在AS3中。我该如何解决这些错误？任何想法如何解决它？任何建议或帮助将不胜感激。谢谢！

编辑：

这里是我的代码在我的AS文件：

package { 

    import flash.display.*; 
    import flash.text.*; 
    import flash.events.Event; 
    import flash.display.MovieClip; 
    import flash.events.MouseEvent; 

    public class Main extends MovieClip { 
     public var mainmenu: MainMenu = new MainMenu(); 
     public var scrollinstructwin: ScrollInstructWin = new ScrollInstructWin(); 
     public var startopt: StartOpt = new StartOpt(); 
     public var learnopt: LearnOpt = new LearnOpt(); 
     public var newload: NewLoad = new NewLoad(); 
     public var propocon: PropoCon = new PropoCon(); 
     public var setcon: SetCon = new SetCon(); 
     public var relationcon: RelationCon = new RelationCon(); 
     public var scrollstorywin: ScrollStoryWin = new ScrollStoryWin(); 

     public function Main() { 
      super(); 
      addChild(mainmenu); 

      mainmenu.x = 350; 
      mainmenu.y = 290; 

      mainmenu.btnStart.addEventListener(MouseEvent.CLICK, start);//warning 1082 
      mainmenu.btnInstruct.addEventListener(MouseEvent.CLICK, instruct); 
     } 
     public function start(event: MouseEvent) {//warning 1008 
      removeChild(mainmenu); 
      addChild(startopt); 

      startopt.x = 350; 
      startopt.y = 290; 

      startopt.btnLearn.addEventListener(MouseEvent.CLICK, learn); 
      startopt.btnPlay.addEventListener(MouseEvent.CLICK, laro); 
      startopt.btnBack.addEventListener(MouseEvent.CLICK, back); 
     } 
     public function instruct(event: MouseEvent) { 
      removeChild(mainmenu); 
      addChild(scrollinstructwin); 

      scrollinstructwin.x = 36.20; 
      scrollinstructwin.y = 21.50; 

      scrollinstructwin.btnGi.addEventListener(MouseEvent.CLICK, gi); 
     } 
     public function gi(event: MouseEvent) { 
      removeChild(scrollinstructwin); 
      addChild(mainmenu); 
     } 
     public function back(event: MouseEvent) { 
      removeChild(startopt); 
      addChild(mainmenu); 
     } 
     public function learn(event: MouseEvent) { 
      removeChild(startopt); 
      addChild(learnopt); 

      learnopt.x = 350; 
      learnopt.y = 290; 

      learnopt.btnPropo.addEventListener(MouseEvent.CLICK, propo); 
      learnopt.btnSets.addEventListener(MouseEvent.CLICK, sets); 
      learnopt.btnRelations.addEventListener(MouseEvent.CLICK, relations); 
      learnopt.btnBack3.addEventListener(MouseEvent.CLICK, backo); 
     } 
     public function laro(event: MouseEvent) { 
      removeChild(startopt); 
      addChild(newload); 

      newload.x = 350; 
      newload.y = 290; 

      newload.btnNew.addEventListener(MouseEvent.CLICK, neww); 
      newload.btnBack2.addEventListener(MouseEvent.CLICK, backu); 
     } 
     public function backo(event: MouseEvent) { 
      removeChild(learnopt); 
      addChild(startopt); 
     } 
     public function neww(event: MouseEvent) { 
      removeChild(learnopt); 
      addChild(scrollstorywin); 

      scrollstorywin.x = 51.15; 
      scrollstorywin.y = 30.05; 
     } 
     public function backu(event: MouseEvent) { 
      removeChild(newload); 
      addChild(startopt); 
     } 
     public function propo(event: MouseEvent) { 
      removeChild(learnopt); 
      propocon.gotoAndStop(1); 
      addChild(propocon); 

      propocon.x = 414.80; 
      propocon.y = 218.60; 

      propocon.btnExit.addEventListener(MouseEvent.CLICK, byeol); 
     } 
     public function byeol(event: MouseEvent) { 
      removeChild(propocon); 
      addChild(learnopt); 
     } 
     /*propocon.btnBtm.addEventListener(MouseEvent.CLICK, byl); 
     public function byl(event: MouseEvent) { 
      removeChild(propocon); 
      addChild(learnopt); 
     }*/ 

     public function sets(event: MouseEvent) { 
      removeChild(learnopt); 
      addChild(setcon); 

      setcon.x = 412.45; 
      setcon.y = 225.00; 
     } 
     public function relations(event: MouseEvent) { 
      removeChild(learnopt); 
      addChild(relationcon); 

      relationcon.x = 400.00; 
      relationcon.y = 225.00; 
     } 
    } 
} 

我已经在评论1082警告之一，1008你认为什么是这些警告的原因是什么？谢谢！

Answer 1

警告1008足够清楚;你的函数定义不包括返回类型声明。你的功能都没有返回任何东西，所以这是无害的。尽管如此，消除警告，你可以这样做：

public function start(event: MouseEvent):void { 

代替

public function start(event: MouseEvent) {