Bootstrap单选按钮 - 使用jQuery添加变量

Question

我使用Bootstrap构建了一个表单。用户点击单选按钮后，在页面底部会显示一个数字。

   <!-- FOOTER -->
   <div class="container">
   <div class="row">
    <div class="col-lg-offset-3 col-xs-12 col-lg-6">
      <div class="jumbotron">
        <div class="row text-center">
          <div class="text-center col-xs-12 col-sm-12 col-md-12 col-lg-12">
            <h2>Broadband Speed Calculator</h2>
          </div>
          <div class="text-center col-lg-12"> 
            <!-- CONTACT FORM https://github.com/jonmbake/bootstrap3-contact-form -->
                <form class="form-horizontal" role="form" method="post" action="" id="broadbandForm">

                    <div class="form-group">
                        <label for="video" class="col-xs-12 control-label text-left">Number of people who use streaming video (eg. Youtube or Netflix) on your network</label>
                        <div class="col-xs-12 btn-group" data-toggle="buttons">
                            <label class="btn btn-primary active"><input class="BroadbandRadioClass" type="radio" name="videoStream" value="0" checked>0</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="videoStream" value="9">1</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="videoStream" value="18">2</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="videoStream" value="27">3</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="videoStream" value="36">4+</label>
                        </div>
                    </div>                

                    <div class="form-group">
                        <label for="videoChat" class="col-xs-12 control-label text-left">Number of people who use video chat (eg. Skype or Facetime) on your network</label>
                        <div class="col-xs-12 btn-group" data-toggle="buttons">
                            <label class="btn btn-primary active"><input class="BroadbandRadioClass" type="radio" name="videoChat" value="0" checked>0</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="videoChat" value="9">1</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="videoChat" value="18">2</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="videoChat" value="27">3</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="videoChat" value="36">4+</label>
                        </div>
                    </div>

                    <div class="form-group">
                        <label for="gaming" class="col-xs-12 control-label text-left">Number of people who use online gaming on your network</label>
                        <div class="col-xs-12 btn-group" data-toggle="buttons">
                            <label class="btn btn-primary active"><input class="BroadbandRadioClass" type="radio" name="gaming" value="0" checked>0</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="gaming" value="5">1</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="gaming" value="10">2</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="gaming" value="15">3</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="gaming" value="20">4+</label>
                        </div>
                    </div>                       

                    <div class="form-group">
                        <label for="audioStream" class="col-xs-12 control-label text-left">Number of people who use streaming audio on your network</label>
                        <div class="col-xs-12 btn-group" data-toggle="buttons">
                            <label class="btn btn-primary active"><input class="BroadbandRadioClass" type="radio" name="audioStream" value="0" checked>0</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="audioStream" value=".32">1</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="audioStream" value=".64">2</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="audioStream" value=".96">3</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="audioStream" value="1.28">4+</label>
                        </div>
                    </div>    

                    <div class="form-group">
                        <label for="generalUse" class="col-xs-12 control-label text-left">Number of people who use the Internet for general use (shopping, banking, e-mail, social media, etc.) on your network</label>
                        <div class="col-xs-12 btn-group" data-toggle="buttons">
                            <label class="btn btn-primary active"><input class="BroadbandRadioClass" type="radio" name="generalUse" value="0" checked>0</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="generalUse" value=".5">1</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="generalUse" value="1">2</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="generalUse" value="1.5">3</label>
                            <label class="btn btn-primary"><input class="BroadbandRadioClass" type="radio" name="generalUse" value="2">4+</label>
                        </div>
                    </div>

                    <div class="form-group">
                        <div id="CalculationResult" class="col-sm-8 col-sm-offset-4">
                        </div>
                    </div>
                </form>
            <!-- END CONTACT FORM -->
          </div>
        </div>
      </div>
    </div>
  </div>
</div>
<!-- / FOOTER --> 

我先使用了以下代码，它运行良好，但是当包含 Bootstrap 脚本时就会出现问题。我理解这是因为 Bootstrap 处理表单的方式导致的。

$("input[type=radio]").click(function() {
var Broadbandtotal = 0;
$("input[type=radio]:checked").each(function() {
    Broadbandtotal += parseFloat($(this).val());
});

$( "#CalculationResult" ).html( "You need at least " + Broadbandtotal );
console.log(Broadbandtotal);
});

这很好，但我想使用Bootstrap。所以我替换了一些东西，最终得到了这个：

$(".btn").click(function() {
var Broadbandtotal = 0;
$(" .active input:radio").each(function() {
    Broadbandtotal += parseFloat($(this).val());
});
$( "#CalculationResult" ).html( "You need at least " + Broadbandtotal ); 
console.log(Broadbandtotal);    
});

这实际上是有效的，但有一个非常奇怪的问题。您需要单击两个按钮才能在底部显示数字（即单击按钮1，它告诉您答案是“0” - 单击按钮2，它告诉您答案是“1”，这实际上是您通过单击第一个按钮应该得到的结果）。

我错过了什么吗？它似乎应该与没有问题的第一段代码运行相同。它似乎是在代码的其余部分运行后将变量相加，但我还没有能够弄清楚这一点。控制台也会说同样的话。迫切需要提示！谢谢...

Fiddle: https://jsfiddle.net/99x50s2s/234/

- Cliff

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你能否包含HTML代码，使得这个问题更加完整？ - Richard

@Richard 我已经更新了，谢谢。 - Cliff

你确定在点击事件被处理之前已经应用了.active类吗？我怀疑它是在之后应用的。 - stephen.vakil

@stephen.vakil 这个看起来是正确的。不过我还是不知道该怎么修复它。我在这里尝试了很多不同的方法。 - Cliff

使用 mouseup 代替 click 可以解决这个问题吗？ - stephen.vakil

Answer 1

我将您的两个点击事件合并为一个更改事件：

$("input[type=radio]").on('change',function() {
    var Broadbandtotal = 0;
    $("input[type=radio]:checked").each(function() {
        Broadbandtotal += parseFloat($(this).val());
    });

    $( "#CalculationResult" ).html( "You need at least " + Broadbandtotal );
    console.log(Broadbandtotal);

    $(" .active input:radio").each(function() {
        Broadbandtotal += parseFloat($(this).val());
    });

});

- phteven

---

就是这样！感谢所有的回复。 - Cliff