我正在尝试使用radio按钮创建一个简单的javascript测验应用程序。我几乎已经完成了应用程序，但是如果我想向allQuestions数组添加一个问题，该选项没有选项等于3（例如2或4）。
例如，根据问题的选项数量，我可以执行哪些操作来移除或添加radio按钮，例如，问题1只有2个选项，但有3个radio按钮＆amp;问题2有4个选项，但有3个radio按钮。
代码：
var allQuestions = [{
question: "Who is the Prime Minister of the United Kingdom?",
choices: ["David Cameron", "Gordon Brown"],
correctAnswer: 0
},
{
question: "Who is the Prime Minister of India?",
choices: ["Rahul Gandhi", "Arvind Kejrival", "Narendra Damodardas Modi","Dr.Manmohan Singh"],
correctAnswer: 2
},
{
question: "Who is the Prime Minister of America?",
choices: ["Donald Trump", "Barack Obama", "Hilary Clinton"],
correctAnswer: 1
},
{
question: " Who averaged one patent for every three weeks of his life?",
choices: ["Thomas Edison", "Tesla", "Einstein"],
correctAnswer: 0
},
{
question: "What continent is cut into two fairly equal halves by the Tropic of Capricorn?",
choices: ["Africa", "South America", "Australia"],
correctAnswer: 2
},
{
question: "What explorer introduced pigs to North America?",
choices: ["Christopher Columbus", "Galileo", "Mussorie"],
correctAnswer: 0
},
{
question: "What F-word is defined in physics as a “nuclear reaction in which nuclei combine to form more massive nuclei”? ",
choices: ["Furnace", "Fusion", "Fission"],
correctAnswer: 1
},
{
question: "What was the first planet to be discovered using the telescope, in 1781?",
choices: ["Uranus", "Jupiter", "Mars"],
correctAnswer: 0
},
{
question: "Who is the chief minister of West Bengal, India?",
choices: ["Buddhadev Bhattacharya", "Jyoti Basu", "Mamta Banerjee"],
correctAnswer: 2
},
{
question: "Which is the fastest growing religion in the world?",
choices: ["Islam", "Christianity", "Hinduism"],
correctAnswer: 0
}
/*
{
question: "Who is the Prime Minister of America?",
choices: ["Donald Trump","Barack Obama","Hilary Clinton"],
correctAnswer:1
},
{
question: "Who is the Prime Minister of America?",
choices: ["Donald Trump","Barack Obama","Hilary Clinton"],
correctAnswer:1
},
{
question: "Who is the Prime Minister of America?",
choices: ["Donald Trump","Barack Obama","Hilary Clinton"],
correctAnswer:1
},
{
question: "Who is the Prime Minister of America?",
choices: ["Donald Trump","Barack Obama","Hilary Clinton"],
correctAnswer:1
},
{
question: "Who is the Prime Minister of America?",
choices: ["Donald Trump","Barack Obama","Hilary Clinton"],
correctAnswer:1
} */
];
$(document).ready(function() {
var currentquestion = 0;
var correctAnswers = 0;
$("#container").hide();
$('#start').click(function() {
$("#container").fadeIn();
$(this).hide();
});
$(function() {
$("#progressbar").progressbar({
max: allQuestions.length - 1,
value: 0
});
});
$('#question').html(allQuestions[currentquestion].question);
$('label[for=option0]').html(allQuestions[currentquestion].choices[0] + "<br/>");
$('label[for=option1]').html(allQuestions[currentquestion].choices[1] + "<br/>");
$('label[for=option2]').html(allQuestions[currentquestion].choices[2] + "<br/>");
$("#next").click(function() {
if ($("input[name=option]:checked").val() == allQuestions[currentquestion].correctAnswer) {
correctAnswers++;
};
currentquestion++;
$(function() {
$("#progressbar").progressbar({
value: currentquestion
});
});
if (currentquestion < allQuestions.length) {
$('#question').html(allQuestions[currentquestion].question);
$('label[for=option0]').html(allQuestions[currentquestion].choices[0] + "<br/>");
$('label[for=option1]').html(allQuestions[currentquestion].choices[1] + "<br/>");
$('label[for=option2]').html(allQuestions[currentquestion].choices[2] + "<br/>");
if (currentquestion == allQuestions.length - 1) {
$('#next').html("Submit");
//$('#next').off("click");
$('#next').click(function() {
$("#container").hide();
$("#result").html("Your Score is " + correctAnswers + " out of " + currentquestion + " and your percentage is " + (correctAnswers * 100 / (currentquestion)) + "%").hide();
$("#result").fadeIn(1500);
});
}
};
});
});.button {
display: inline-block;
padding: 1em;
background-color: #79BD9A;
text-decoration: none;
color: white;
}
body {
text-align: center;
}
.ui-widget-header {
background-image: none !important;
background-color: #FF7860 !important; //Any colour can go here
}
label {
display: inline-block;
/*text-align: center;*/
}
h3,
#next {
text-align: center;
display: inline-block;
border-radius: 20%;
}
input[name="option"] {
float: left;
}
#form div {
margin: auto;
max-width: 205px;
}
#progressbar {
margin: auto;
margin-top: 20px;
float: none;
width: 50%;
/*height: 100%;*/
}
#container {
text-align: center;
}
span {
margin: 5em;
padding: 3em;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<link href="https://code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css" rel="stylesheet" />
<script src="https://code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<body>
<h1>Quiz</h1>
<a href="#" id="start" class="button">Let's Begin</a>
<br/>
<div id="container">
<h3 id="question"></h3>
<form id="form">
<div>
<input type="radio" name="option" value="0" id="option0" checked>
<label for='option0'></label>
<br/>
</div>
<div>
<input type="radio" name="option" value="1" id="option1">
<label for='option1'></label>
<br/>
</div>
<div>
<input type="radio" name="option" value="2" id="option2">
<label for='option2'></label>
<br/>
</div>
</form>
<br/>
<a href="#" id="next" class="button">Next</a>
<br/>
<div id="progressbar"></div>
</div>
<div id="result"></div>
</body>
以下是JSFiddle
答案 0 :(得分：1)
尝试这种方式：我也编辑了jsfiddle https://jsfiddle.net/kingychiu/vLwjzx8o/16/
function setupOptions(){
$('#question').html(allQuestions[currentquestion].question);
var options = allQuestions[currentquestion].choices;
var formHtml ='';
for (var i = 0; i < options.length; i++){
formHtml += '<div><input type="radio" name="option" value="'+i+'" id="option'+i+'"><label for="option'+i+'">'+allQuestions[currentquestion].choices[i]+'<br/></label><br/></div>';
}
$('#form').html(formHtml);
}
顺便说一下，要用ui进行动态数据绑定，我建议你使用Angular js，ng-repeat，这样可以使代码看起来更好。
答案 1 :(得分：0)
您可能想为每个循环尝试一次：
cmdexe.Start()