二选一，好几个二

package com{

import flash.display.MovieClip;
    import flash.events.MouseEvent;
    import flash.display.SimpleButton;
    import flash.display.Stage;
    import flash.geom.Point;
    import flash.text.TextField;

    public class SecondFrame extends MovieClip {

        private var thisMc:MovieClip;
        private var btnMc:MovieClip;
        public static var answerArr:Array=[];
        public function SecondFrame(_thisMc:MovieClip,_btnMc:MovieClip ) {
            thisMc=_thisMc;
            btnMc=_btnMc;
            btnMc.buttonMode=true;
            btnMc.addEventListener(MouseEvent.CLICK,onBtn);
            for (var i:uint=0; i<btnMc.numChildren; i++) {
                btnMc.getChildAt(i).alpha=0;
            }
        }
        private function onBtn(e:MouseEvent) {
            e.target.alpha=1;
            for (var i:uint=0; i<btnMc.numChildren; i++) {
                if (e.target.name==btnMc.getChildAt(i).name) {
                    if (i%2==0) {
                        btnMc.getChildAt(i+1).alpha=0;
                    } else {
                        btnMc.getChildAt(i-1).alpha=0;
                    }
                }
            }
        }


        private var nextBtn:SimpleButton;
        public function nextFun(_nextBtn:SimpleButton ) {
            nextBtn=_nextBtn;
            nextBtn.addEventListener(MouseEvent.CLICK,onNextBtn);
        }
        private function onNextBtn(e:MouseEvent) {
            for (var i:uint=0; i<btnMc.numChildren; i++) {
                if (i%2==0) {
                    if (btnMc.getChildAt(i).alpha==1) {
                        answerArr.push(i);
                    } else if (btnMc.getChildAt(i+1).alpha==1) {
                        answerArr.push(i+1);
                    }else{
                        answerArr.push();
                    }
                }
            }
            trace(answerArr);
            btnMc.removeEventListener(MouseEvent.CLICK,onBtn);
            nextBtn.removeEventListener(MouseEvent.CLICK,onNextBtn);
            thisMc.nextFrame();

        }
    }
}

 

//答案

        private var arr2:Array=[0,3];
        public function Answer2(_mc:MovieClip ) {

            for (var j:Number=0; j<_mc["diMc"].numChildren; j++) {
                _mc["diMc"].getChildAt(j).alpha=0;
            }
            for (var i:Number=0; i<arr2.length; i++) {
                _mc["answerMc"].getChildAt(i).alpha=0;
                if (SecondFrame.answerArr[i]!=undefined) {
                    _mc["diMc"].getChildAt(SecondFrame.answerArr[i]).alpha=1;
                }
                if (SecondFrame.answerArr[i]==arr2[i]) {
                    funnum0();
                } else {
                    _mc["right"].nextFrame();
                    _mc["answerMc"].getChildAt(i).alpha=1;
                }
            }
        }