您好，感谢您的时间。我有一个AS3 code的随机选取5张出7，无重复。

Hello and thank you for your time. I have an as3 code which randomly picks 5 frames out of 7, no repeats.

var mygroup1:RadioButtonGroup = new RadioButtonGroup("group1");
q1a1.group = q1a2.group = q1a3.group = q1a4.group = q1a5.group = mygroup1;

var number_array:Array = [8158,8159,8160,8161,8162,8163,8164];
var final_array:Array = [];
var count_selected:int = 5;
var i:int;

for(i = 0; i < count_selected; i++)
   {
      if(number_array.length == 0)
         break;
      else
         final_array.push(number_array.splice(Math.floor(Math.random() * number_array.length), 1)[0]);
   }

var index = 0;
var currentQuestion:int = final_array[index];
var answers:Object = {
    8158: 'B) 12',
    8159: 'F) All of the above',
    8160: 'A) True',
    8161: 'B) False',
    8162: 'C) 4',
    8163: 'F) D and E',
    8164: 'B) B'
};

var getAnswer = mygroup1.selection.label;  //Getting the selection from RadioButtonGroup

submitBtn.addEventListener(MouseEvent.CLICK, onSubmitClicked);

function onSubmitClicked(e:MouseEvent):void {
var answer:String = getAnswer();
   if (answer === answers[currentQuestion]) 
      awardScore(currentQuestion);
      ++index;
      currentQuestion = final_array[index];
      gotoAndStop(final_array[index]);
   }

，当你点击startBtn，它把你的第一个随机生成的帧（final_array [0]），这一切都极大的随机启动程序。

and when you click on the "startBtn", it takes you to the first randomly generated frame(final_array[0]) and it's all great to start the process randomly.

每个接下来的7帧的有一个提交按钮（B1，B2 ...... B7），其跟踪的得分，并提交答案，并应到下一步随机挑选框架，但只有5次，下面其余生成frames....gotoAndStop(final_array[1])...(final_array[2])....(final_array[3])....(final_array[4]).

Each of the next 7 frames has a submit button(b1,b2...b7) which keeps track of the score and submits the answer and also should go to the next randomly picked frame but only 5 times, following the remaining generated frames....gotoAndStop(final_array[1])...(final_array[2])....(final_array[3])....(final_array[4]).

    b1.addEventListener(MouseEvent.CLICK, quizHandler1)
    function  quizHandler1(event:MouseEvent):void{
    if(mygroup1.selection.label=="B) 12") {
        count = count + 20;
        scoreresult.text = (count).toString();
        gotoAndStop(final_array[1]);    
    }
    else{
        gotoAndStop(final_array[1]);
        }
    }

我的问题是...因为用户将只能到5随机挑选帧出7，我怎么能保证这一切的一切7帧的按钮会听，并按照gotoAndStop（final_array []）;声明在5秩序？因为到了最后，2帧都将被排除在外，而这两个框架将在每卷随意改变。我希望我可以解释我的困境。再次感谢你。

My problem is...Since the user will only go to 5 randomly picked frames out of 7, how can I make sure all the buttons in all 7 frames will listen and follow the gotoAndStop(final_array[]); statement in the order of 5? Because at the end, 2 frames will be left out, and those two frames will change randomly in every roll. I hope I could explain my dilemma. Thank you again.

推荐答案

要做到像你这样的问答，我认为你不需要重复在每一帧的所有内容。你可以把你的问题在​​影片剪辑（或一个影片剪辑有许多帧），然后你可以把它添加到您的舞台，并为您的支票中，您可以创建它一次，每一次你可以改变只是他们的价值观和标签。对于按钮，你只需要一个按钮，它会验证和检查当前的问题和去到下一个。

To do a quiz like yours, I think that you don't need to duplicate all content on every frame. You can put your questions in MovieClips ( or one MovieClip with many frames ) and then you can add it to your stage, and for your check box you can create it once and every time you can change just their values and labels. For buttons, you need only one button which will validate and check the current question and the go to the next one.

就以这个例子来看看：

var score:int;
var max_score:int;
const default_score:int = 20;

// create our questions list (7 questions) : 
var questions_list:Object = {
    // index        : to identify our question
    // movie_clip   : the class name used for AS linkage    
    1: { index : 1, movie_clip : Question1, good_answer : 'css3', first_answer : 'html5', second_answer : 'jquery', third_answer : 'css3', score : default_score }, 
    2: { index : 2, movie_clip : Question2, good_answer : 'html5', first_answer : 'html5',  second_answer : 'less', third_answer : 'ruby', score : 50 }, 
    3: { index : 3, movie_clip : Question3, good_answer : 'jquery', first_answer : 'ruby',  second_answer : 'jquery', third_answer : 'css3', score : default_score }, 
    4: { index : 4, movie_clip : Question4, good_answer : 'less', first_answer : 'less', second_answer : 'html5', third_answer : 'css3', score : 15 }, 
    5: { index : 5, movie_clip : Question5, good_answer : 'nodejs', first_answer : 'python', second_answer : 'nodejs', third_answer : 'jquery', score : 10 }, 
    6: { index : 6, movie_clip : Question6, good_answer : 'python', first_answer : 'css3', second_answer : 'html5', third_answer : 'python', score : default_score }, 
    7: { index : 7, movie_clip : Question7, good_answer : 'ruby', first_answer : 'ruby', second_answer : 'html5', third_answer : 'less', score : default_score }
};

var enabled_questions:Array = [1, 2, 3, 4, 5, 6, 7];    
var current_question:int = 0;

//----------------------------------------------------------------------------------------------------

// sprite that shows our questions 
var questions_container:Sprite = new Sprite();
    questions_container.x = questions_container.y = 20;
    questions_container.visible = false;
    addChild(questions_container);

var checks_group:RadioButtonGroup = new RadioButtonGroup('checks_group');

// sprite that contains our 3 check box 
var checks_container:Sprite = new Sprite();
    checks_container.visible = false;
    checks_container.x = int(stage.stageWidth / 2);
    checks_container.y = 50;
    addChild(checks_container);

// create our check box, 3 buttons in my case
// the 4th one is used only to uncheck every time all check box
for(var i:int = 0; i < 4; i++)
{
    var btn_check:RadioButton = new RadioButton();
        if(i != 3){
            btn_check.y = i * 30;       
        } else {

            // our 4th check box is hidden
            btn_check.visible = false;
        }
        btn_check.group = checks_group; 
        btn_check.name = 'btn_check' + i;
        checks_container.addChild(btn_check);
}

// start button
var btn_start:Button = new Button();
    btn_start.label = 'Start ! ';
    btn_start.width = 180;
    btn_start.height = 60;
    btn_start.x = int((stage.stageWidth - btn_start.width)/2);
    btn_start.y = int((stage.stageHeight - btn_start.height)/2) - 20;
    btn_start.addEventListener(MouseEvent.CLICK, startQuiz);
    addChild(btn_start);

// next button, to go to the next question
var btn_next:Button = new Button()
    btn_next.label = 'Next  >> ';
    btn_next.width = 90;
    btn_next.height = 30;
    btn_next.visible = false;
    btn_next.x = stage.stageWidth - btn_next.width - 10;
    btn_next.y = stage.stageHeight - btn_next.height - 10;
    btn_next.addEventListener(MouseEvent.CLICK, checkAnswer);
    addChild(btn_next); 

// a text field which will show the score and the current question number
var txt_score:TextField = new TextField();
    txt_score.width = 200;
    txt_score.height = 30;
    txt_score.x = stage.stageWidth - txt_score.width;
    txt_score.y = 10;
    txt_score.visible = false;
    txt_score.selectable = false;
    addChild(txt_score);

//----------------------------------------------------------------------------------------------------

function startQuiz(e:MouseEvent):void
{   
    // here we will get only 5 questions
    // I used a method from http://stackoverflow.com/questions/11980657/as3-random-array-randomize-array-actionscript-3 to shuffle the array
    // and then I remove the last 2 elements from the array
    enabled_questions = enabled_questions.sort(function(i:*,j:*){return(Math.random()<.5)?-1:1;}).slice(0,enabled_questions.length-2);

    for(var i:int = 0; i < enabled_questions.length; i++){
        var q_i:int = enabled_questions[i];
        var q:Object = questions_list[q_i];
        max_score += q.score;

        // create our questions instance and hide it
        // every question is an instance of a movieclip in our library
        // we can alse use only one movieclip and then we can use its timeline to go from a question to another
        var question = new (q.movie_clip);
            question.index = q_i;
            question.visible = false;
            questions_container.addChild(question);
    }       

    // hide the start button
    e.target.visible = false;

    // show other elements 
    questions_container.visible = checks_container.visible = btn_next.visible = txt_score.visible = true    

    // load the first question
    loadQuestion(current_question);

}

// check the answer and update score
function checkAnswer(e:MouseEvent):void 
{   
    var question:Object = questions_list[enabled_questions[current_question]];

    if(question.good_answer == checks_group.selectedData){

        // update the score
        setScore(question.score);       
    }

    if(current_question < enabled_questions.length - 1){        

        current_question ++;
        loadQuestion(current_question);

    } else {

        e.target.x = e.target.y = 0;
        e.target.enabled = false;
        e.target.width = stage.stageWidth;
        e.target.height = stage.stageHeight;
        e.target.label = 'You have finished the quiz, your score is : ' + score;

        checks_container.visible = questions_container.visible = txt_score.visible = false;

    }
}

// load question (show it) and update our check box
function loadQuestion(index:int):void 
{   
    var question:Object = questions_list[enabled_questions[index]];

    for(var i:int = 0; i < checks_container.numChildren; i++){      
        if(checks_container.getChildAt(i) is RadioButton){
            var btn:RadioButton = RadioButton(checks_container.getChildAt(i));          
            switch (btn.name){              
                case 'btn_check0' : btn.value = btn.label = question.first_answer; break;
                case 'btn_check1' : btn.value = btn.label = question.second_answer; break;
                case 'btn_check2' : btn.value = btn.label = question.third_answer; break;   
                case 'btn_check3' : btn.selected = true; break; 
            }               
        }       
    }

    for( i=0; i < questions_container.numChildren; i++){            
        if(questions_container.getChildAt(i) is MovieClip){
            var mc:MovieClip = MovieClip(questions_container.getChildAt(i));
                mc.visible = mc.index == question.index;    
        }       
    }

    // setScore is used here just to update the question number in the score text field
    setScore();

}

// show the score and current question
function setScore(new_score:int = 0){
    score += new_score;
    txt_score.text = 'Score : ' + score.toString() + ' / ' + max_score.toString() + ', Question : ' + (current_question+1) + ' / ' + enabled_questions.length;
}

// icons used in this example by Jozef Krajčovič : https://www.iconfinder.com/Jozef89

这code给你这样的东西：

This code gives you something like this :

您还可以看到它的工作这里。

You can also see it working here.

当然，这只是一个简单的例子，你可以改善并使之适应您的需求。

Of course this is just a simple example, you can improve and adapt it to your needs.

希望能有所帮助。