如何检查(动态)选中了哪个单选按钮？

Question

我正在创建一个在线考试门户，下面是向考生显示问题的代码。我不知道如何处理考生点击的答案

$("input[name='hello']").click(function(){
    alert("you clicked on");
});

单选按钮是为100个问题动态创建的，每个问题4个

Answer 1

试试这个-

​

$('input[data-type=choice]').change(function() {
  var Question = $(this).attr('name');
  var Checked = $(this).attr('value');
  console.log('Selected Choice for ' + Question + ' is ' + Checked);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="button" value="Log all Answers" onclick="logAllAnswers()">
<input type="button" value="Clear Log" onclick="console.clear();">
<hr>
<form>
  <fieldset>
    <legend>1. Select the answer for the first question.</legend>
    <input type="radio" data-type="choice" name="Q1" value="1">Option 1
    <br>
    <input type="radio" data-type="choice" name="Q1" value="2">Option 2
    <br>
    <input type="radio" data-type="choice" name="Q1" value="3">Option 3
    <br>
    <input type="radio" data-type="choice" name="Q1" value="4">Option 4
  </fieldset>
  <fieldset>
    <legend>2. Select the answer for the second question.</legend>
    <input type="radio" data-type="choice" name="Q2" value="1">Option 1
    <br>
    <input type="radio" data-type="choice" name="Q2" value="2">Option 2
    <br>
    <input type="radio" data-type="choice" name="Q2" value="3">Option 3
    <br>
    <input type="radio" data-type="choice" name="Q2" value="4">Option 4
  </fieldset>
  <fieldset>
    <legend>3. Select the answer for the third question.</legend>
    <input type="radio" data-type="choice" name="Q3" value="1">Option 1
    <br>
    <input type="radio" data-type="choice" name="Q3" value="2">Option 2
    <br>
    <input type="radio" data-type="choice" name="Q3" value="3">Option 3
    <br>
    <input type="radio" data-type="choice" name="Q3" value="4">Option 4
  </fieldset>
</form>



<script>
  function logAllAnswers() {
    $('input[data-type=choice]:checked').each(function() {
      var Question = $(this).attr('name');
      var Checked = $(this).attr('value');
      console.log('Selected Choice for ' + Question + ' is ' + Checked);
    });
  }
</script>

​

Answer 2

考虑每个选项的值

然后使用下面的代码来了解单击的是哪一个：

$("input[name='hello']:checked").val();

你可以像这样重写你的代码：

$("input[name='hello']").click(function(){
   var v=$("input[name='hello']:checked").val();
   alert("you clicked on"+v);
});

Answer 3

假设你有一个包含每4个框的questionWrapper类的div，你可以这样做：

var collection = $(".questionWrapper");
$.each(collection, function(i, $questionWrapper, function(){
    //Do this for all the questions
    //Find the checked input (maybe use classes here...) and get its value
    var clickedAnswer = $($questionWrapper).find("input:checked").val();
    //Do something with the clicked var, maybe push it to an array and then compare the array to the solution
});