创建一个可自动显示答案说明的JavaScript测验 [英] Creating a JavaScript Quiz that shows answer explanation automatically
本文介绍了创建一个可自动显示答案说明的JavaScript测验的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
提琴手演示: http://jsfiddle.net/natmit/7Du6N/
我一直在拔头发，所以非常感谢JavaScript/Jquery天才的任何帮助...我已经联系了这段代码的作者，而他没有回答.
I have been pulling out my hair so any help from JavaScript/Jquery geniuses out there is much appreciated... I have already contacted the writer of this code and he has not replied.
我需要帮助使测验做到以下列出的这些事情:
I need help making the quiz do these things listed below:
-
用户单击选择后，立即显示说明 无需单击检查答案".
After user clicks choice, show the explanation immediately without clicking "Check Answer".
我根本不需要检查答案"按钮. 在用户单击之前，应该隐藏提交"按钮 选择，然后应显示标记为下一个问题"，并在单击时移至 测验中的下一个问题.
I don't want the "Check Answer" button at all. The submit button should be hidden until user clicks choice, and then it should show labeled "Next Question" and on click, move to next question in quiz.
将说明移至答案选项下方.
Move the explanation to display below the answer choices.
在结果页面上，我需要一种方法来显示一张图像(如果它们 取得1-5分正确，如果获得6-8分则获得另一张图片 (假设总共有8个问题).
On the results page, I need a way to display one image if they scored 1-5 correct, and a different image if they scored 6-8 correct (assuming there are 8 questions total).
预先感谢您， N
var quiztitle = "Quiz Title";
/**
* Set the information about your questions here. The correct answer string needs to match
* the correct choice exactly, as it does string matching. (case sensitive)
*
*/
var quiz = [
{
"question" : "Q1: Who came up with the theory of relativity?",
"image" : "http://upload.wikimedia.org/wikipedia/commons/thumb/d/d3/Albert_Einstein_Head.jpg/220px-Albert_Einstein_Head.jpg",
"choices" : [
"Sir Isaac Newton",
"Nicolaus Copernicus",
"Albert Einstein",
"Ralph Waldo Emmerson"
],
"correct" : "Albert Einstein",
"explanation" : "Albert Einstein drafted the special theory of relativity in 1905.",
},
{
"question" : "Q2: Who is on the two dollar bill?",
"image" : "http://upload.wikimedia.org/wikipedia/commons/thumb/9/94/US_%242_obverse-high.jpg/320px-US_%242_obverse-high.jpg",
"choices" : [
"Thomas Jefferson",
"Dwight D. Eisenhower",
"Benjamin Franklin",
"Abraham Lincoln"
],
"correct" : "Thomas Jefferson",
"explanation" : "The two dollar bill is seldom seen in circulation. As a result, some businesses are confused when presented with the note.",
},
{
"question" : "Q3: What event began on April 12, 1861?",
"image" : "",
"choices" : [
"First manned flight",
"California became a state",
"American Civil War began",
"Declaration of Independence"
],
"correct" : "American Civil War began",
"explanation" : "South Carolina came under attack when Confederate soldiers attacked Fort Sumter. The war lasted until April 9th 1865.",
},
];
/******* No need to edit below this line *********/
var currentquestion = 0, score = 0, submt=true, picked;
jQuery(document).ready(function($){
/**
* HTML Encoding function for alt tags and attributes to prevent messy
* data appearing inside tag attributes.
*/
function htmlEncode(value){
return $(document.createElement('div')).text(value).html();
}
/**
* This will add the individual choices for each question to the ul#choice-block
*
* @param {choices} array The choices from each question
*/
function addChoices(choices){
if(typeof choices !== "undefined" && $.type(choices) == "array"){
$('#choice-block').empty();
for(var i=0;i<choices.length; i++){
$(document.createElement('li')).addClass('choice choice-box').attr('data-index', i).text(choices[i]).appendTo('#choice-block');
}
}
}
/**
* Resets all of the fields to prepare for next question
*/
function nextQuestion(){
submt = true;
$('#explanation').empty();
$('#question').text(quiz[currentquestion]['question']);
$('#pager').text('Question ' + Number(currentquestion + 1) + ' of ' + quiz.length);
if(quiz[currentquestion].hasOwnProperty('image') && quiz[currentquestion]['image'] != ""){
if($('#question-image').length == 0){
$(document.createElement('img')).addClass('question-image').attr('id', 'question-image').attr('src', quiz[currentquestion]['image']).attr('alt', htmlEncode(quiz[currentquestion]['question'])).insertAfter('#question');
} else {
$('#question-image').attr('src', quiz[currentquestion]['image']).attr('alt', htmlEncode(quiz[currentquestion]['question']));
}
} else {
$('#question-image').remove();
}
addChoices(quiz[currentquestion]['choices']);
setupButtons();
}
/**
* After a selection is submitted, checks if its the right answer
*
* @param {choice} number The li zero-based index of the choice picked
*/
function processQuestion(choice){
if(quiz[currentquestion]['choices'][choice] == quiz[currentquestion]['correct']){
$('.choice').eq(choice).css({'background-color':'#50D943'});
$('#explanation').html('<strong>Correct!</strong> ' + htmlEncode(quiz[currentquestion]['explanation']));
score++;
} else {
$('.choice').eq(choice).css({'background-color':'#D92623'});
$('#explanation').html('<strong>Incorrect.</strong> ' + htmlEncode(quiz[currentquestion]['explanation']));
}
currentquestion++;
$('#submitbutton').html('NEXT QUESTION »').on('click', function(){
if(currentquestion == quiz.length){
endQuiz();
} else {
$(this).text('Check Answer').css({'color':'#222'}).off('click');
nextQuestion();
}
})
}
/**
* Sets up the event listeners for each button.
*/
function setupButtons(){
$('.choice').on('mouseover', function(){
$(this).css({'background-color':'#e1e1e1'});
});
$('.choice').on('mouseout', function(){
$(this).css({'background-color':'#fff'});
})
$('.choice').on('click', function(){
picked = $(this).attr('data-index');
$('.choice').removeAttr('style').off('mouseout mouseover');
$(this).css({'border-color':'#222','font-weight':700,'background-color':'#c1c1c1'});
if(submt){
submt=false;
$('#submitbutton').css({'color':'#000'}).on('click', function(){
$('.choice').off('click');
$(this).off('click');
processQuestion(picked);
});
}
})
}
/**
* Quiz ends, display a message.
*/
function endQuiz(){
$('#explanation').empty();
$('#question').empty();
$('#choice-block').empty();
$('#submitbutton').remove();
$('#question').text("You got " + score + " out of " + quiz.length + " correct.");
$(document.createElement('h2')).css({'text-align':'center', 'font-size':'4em'}).text(Math.round(score/quiz.length * 100) + '%').insertAfter('#question');
}
/**
* Runs the first time and creates all of the elements for the quiz
*/
function init(){
//add title
if(typeof quiztitle !== "undefined" && $.type(quiztitle) === "string"){
$(document.createElement('h1')).text(quiztitle).appendTo('#frame');
} else {
$(document.createElement('h1')).text("Quiz").appendTo('#frame');
}
//add pager and questions
if(typeof quiz !== "undefined" && $.type(quiz) === "array"){
//add pager
$(document.createElement('p')).addClass('pager').attr('id','pager').text('Question 1 of ' + quiz.length).appendTo('#frame');
//add first question
$(document.createElement('h2')).addClass('question').attr('id', 'question').text(quiz[0]['question']).appendTo('#frame');
//add image if present
if(quiz[0].hasOwnProperty('image') && quiz[0]['image'] != ""){
$(document.createElement('img')).addClass('question-image').attr('id', 'question-image').attr('src', quiz[0]['image']).attr('alt', htmlEncode(quiz[0]['question'])).appendTo('#frame');
}
$(document.createElement('p')).addClass('explanation').attr('id','explanation').html(' ').appendTo('#frame');
//questions holder
$(document.createElement('ul')).attr('id', 'choice-block').appendTo('#frame');
//add choices
addChoices(quiz[0]['choices']);
//add submit button
$(document.createElement('div')).addClass('choice-box').attr('id', 'submitbutton').text('Check Answer').css({'font-weight':700,'color':'#222','padding':'30px 0'}).appendTo('#frame');
setupButtons();
}
}
init();
});
</script>
<style type="text/css" media="all">
/*css reset */
html,body,div,span,h1,h2,h3,h4,h5,h6,p,code,small,strike,strong,sub,sup,b,u,i{border:0;font-size:100%;font:inherit;vertical-align:baseline;margin:0;padding:0;}
article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block;}
body{line-height:1; font:normal 0.9em/1em "Helvetica Neue", Helvetica, Arial, sans-serif;}
ol,ul{list-style:none;}
strong{font-weight:700;}
#frame{max-width:620px;width:auto;border:1px solid #ccc;background:#fff;padding:10px;margin:3px;}
h1{font:normal bold 2em/1.8em "Helvetica Neue", Helvetica, Arial, sans-serif;text-align:left;border-bottom:1px solid #999;padding:0;width:auto}
h2{font:italic bold 1.3em/1.2em "Helvetica Neue", Helvetica, Arial, sans-serif;padding:0;text-align:center;margin:20px 0;}
p.pager{margin:5px 0 5px; font:bold 1em/1em "Helvetica Neue", Helvetica, Arial, sans-serif;color:#999;}
img.question-image{display:block;max-width:250px;margin:10px auto;border:1px solid #ccc;width:100%;height:auto;}
#choice-block{display:block;list-style:none;margin:0;padding:0;}
#submitbutton{background:#5a6b8c;}
#submitbutton:hover{background:#7b8da6;}
#explanation{margin:0 auto;padding:20px;width:75%;}
.choice-box{display:block;text-align:center;margin:8px auto;padding:10px 0;border:1px solid #666;cursor:pointer;-webkit-border-radius: 5px;-moz-border-radius: 5px;border-radius: 5px;}
</style>
推荐答案
尝试下面的代码.选择答案后，它将显示3秒钟的解释，然后移至下一个问题.
Try the code below. On selecting an answer, it'll show the explanation for 3 seconds and will then move onto next question.
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script language="javascript" type="text/javascript">
var quiztitle = "Social Security Quiz";
var quiz = [
{
"question" : "Q1: Who came up with the theory of relativity?",
"image" : "http://upload.wikimedia.org/wikipedia/commons/thumb/d/d3/Albert_Einstein_Head.jpg/220px-Albert_Einstein_Head.jpg",
"choices" : [
"Sir Isaac Newton",
"Nicolaus Copernicus",
"Albert Einstein",
"Ralph Waldo Emmerson"
],
"correct" : "Albert Einstein",
"explanation" : "Albert Einstein drafted the special theory of relativity in 1905.",
},
{
"question" : "Q2: Who is on the two dollar bill?",
"image" : "http://upload.wikimedia.org/wikipedia/commons/thumb/9/94/US_%242_obverse-high.jpg/320px-US_%242_obverse-high.jpg",
"choices" : [
"Thomas Jefferson",
"Dwight D. Eisenhower",
"Benjamin Franklin",
"Abraham Lincoln"
],
"correct" : "Thomas Jefferson",
"explanation" : "The two dollar bill is seldom seen in circulation. As a result, some businesses are confused when presented with the note.",
},
{
"question" : "Q3: What event began on April 12, 1861?",
"image" : "",
"choices" : [
"First manned flight",
"California became a state",
"American Civil War began",
"Declaration of Independence"
],
"correct" : "American Civil War began",
"explanation" : "South Carolina came under attack when Confederate soldiers attacked Fort Sumter. The war lasted until April 9th 1865.",
},
];
var currentquestion = 0,
score = 0,
submt = true,
picked;
$(document).ready(function(){
$("#submitbutton").hide();
function htmlEncode(value) {
return $(document.createElement('div')).text(value).html();
}
function addChoices(choices) {
if (typeof choices !== "undefined" && $.type(choices) == "array") {
$('#choice-block').empty();
for (var i = 0; i < choices.length; i++) {
$(document.createElement('li')).addClass('choice choice-box').attr('data-index', i).text(choices[i]).appendTo('#choice-block');
}
}
}
function nextQuestion() {
submt = true;
//alert("nQ");
$('#explanation').empty();
$('#question').text(quiz[currentquestion]['question']);
$('#pager').text('Question ' + Number(currentquestion + 1) + ' of ' + quiz.length);
if (quiz[currentquestion].hasOwnProperty('image') && quiz[currentquestion]['image'] != "") {
if ($('#question-image').length == 0) {
$(document.createElement('img')).addClass('question-image').attr('id', 'question-image').attr('src', quiz[currentquestion]['image']).attr('alt', htmlEncode(quiz[currentquestion]['question'])).insertAfter('#question');
} else {
$('#question-image').attr('src', quiz[currentquestion]['image']).attr('alt', htmlEncode(quiz[currentquestion]['question']));
}
} else {
$('#question-image').remove();
}
addChoices(quiz[currentquestion]['choices']);
setupButtons();
}
function processQuestion() {
//alert(choice);
currentquestion++;
//alert(currentquestion);
$("#submitbutton").hide();
if (currentquestion == quiz.length) {
endQuiz();
} else {
nextQuestion();
}
}
function setupButtons() {
$('.choice').on('mouseover', function () {
$(this).css({
'background-color': '#e1e1e1'
});
});
$('.choice').on('mouseout', function () {
$(this).css({
'background-color': '#fff'
});
})
$('.choice').on('click', function () {
//alert("");
choice = $(this).attr('data-index');
$('.choice').removeAttr('style').off('mouseout mouseover');
$(this).css({
'border-color': '#222',
'font-weight': 700,
'background-color': '#c1c1c1'
});
if (quiz[currentquestion]['choices'][choice] == quiz[currentquestion]['correct']) {
$('.choice').eq(choice).css({
'background-color': '#50D943'
});
$('#explanation').html('<strong>Correct!</strong> ' + htmlEncode(quiz[currentquestion]['explanation']));
score++;
} else {
$('.choice').eq(choice).css({
'background-color': '#D92623'
});
$('#explanation').html('<strong>Incorrect.</strong> ' + htmlEncode(quiz[currentquestion]['explanation']));
}
if (submt) {
//alert("submit");
submt = false;
setTimeout(processQuestion,3000);
}
})
}
function endQuiz() {
$('#explanation').empty();
$('#question').empty();
$('#choice-block').empty();
$('#submitbutton').remove();
$('#question').text("You got " + score + " out of " + quiz.length + " correct.");
$(document.createElement('h2')).css({
'text-align': 'center',
'font-size': '4em'
}).text(Math.round(score / quiz.length * 100) + '%').insertAfter('#question');
var result = Math.round(score / quiz.length * 100);
var g = document.createElement('img');
g.id = 'imgId';
$(g).css({
'height':'100px',
'width': '100px',
'margin-left':'40%'
}).insertAfter('#explanation');
if(result < 33){
$("#imgId").attr("src","http://www.chaaps.com/wp-content/uploads/2010/07/fail.jpg");
}
else if(result < 67){
$("#imgId").attr("src","http://www.ytechie.com/2008/04/how-does-your-boss-know-youre-doing-a-great-job/good-job.png");
}
else if(result < 100){
$("#imgId").attr("src","http://www.ytechie.com/2008/04/how-does-your-boss-know-youre-doing-a-great-job/good-job.png");
}
else if(result == 100){
$("#imgId").attr("src","http://www.getaheadinmarketing.com/wp-content/themes/myjournal/js/timthumb.php?src=http://www.getaheadinmarketing.com/wp-content/uploads/evaluation-tick.jpg&w=653&h=260");
}
}
function init() {
//add title
if (typeof quiztitle !== "undefined" && $.type(quiztitle) === "string") {
$(document.createElement('h1')).text(quiztitle).appendTo('#frame');
} else {
$(document.createElement('h1')).text("Quiz").appendTo('#frame');
}
//add pager and questions
if (typeof quiz !== "undefined" && $.type(quiz) === "array") {
//add pager
$(document.createElement('p')).addClass('pager').attr('id', 'pager').text('Question 1 of ' + quiz.length).appendTo('#frame');
//add first question
$(document.createElement('h2')).addClass('question').attr('id', 'question').text(quiz[0]['question']).appendTo('#frame');
//add image if present
if (quiz[0].hasOwnProperty('image') && quiz[0]['image'] != "") {
$(document.createElement('img')).addClass('question-image').attr('id', 'question-image').attr('src', quiz[0]['image']).attr('alt', htmlEncode(quiz[0]['question'])).appendTo('#frame');
}
//questions holder
$(document.createElement('ul')).attr('id', 'choice-block').appendTo('#frame');
//add choices
addChoices(quiz[0]['choices']);
$(document.createElement('p')).addClass('explanation').attr('id', 'explanation').html(' ').appendTo('#frame');
setupButtons();
}
}
init();
});
</script>
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