Html Bootstrap 单选按钮“已检查”标志
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Bootstrap radio button "checked" flag
提问by Khrys
In case #1 works, in case #2 it do not works. Check the code bellow:
在#1 的情况下，在#2 的情况下它不起作用。检查下面的代码：
<div class="container">
<div class="row">
<h1>Radio Group #1</h1>
<label class="radio-inline">
<input name="radioGroup" id="radio1" value="option1" type="radio"> 1
</label>
<label class="radio-inline">
<input name="radioGroup" id="radio2" value="option2" checked="checked" type="radio"> 2
</label>
<label class="radio-inline">
<input name="radioGroup" id="radio3" value="option3" type="radio"> 3
</label>
</div>
<div class="row">
<h1>Radio Group #2</h1>
<label for="year" class="control-label input-group">Year</label>
<div class="btn-group" data-toggle="buttons">
<label class="btn btn-default">
<input name="year" value="2011" type="radio">2011
</label>
<label class="btn btn-default">
<input name="year" value="2012" type="radio">2012
</label>
<label class="btn btn-default">
<input name="year" value="2013" checked="checked" type="radio">2013
</label>
</div>
</div>
</div>
You can see it in action here: http://bootply.com/84165
你可以在这里看到它的实际效果：http: //bootply.com/84165
回答by Trevor
Assuming you want a default button checked.
假设您想要选中一个默认按钮。
<div class="row">
<h1>Radio Group #2</h1>
<label for="year" class="control-label input-group">Year</label>
<div class="btn-group" data-toggle="buttons">
<label class="btn btn-default">
<input type="radio" name="year" value="2011">2011
</label>
<label class="btn btn-default">
<input type="radio" name="year" value="2012">2012
</label>
<label class="btn btn-default active">
<input type="radio" name="year" value="2013" checked="">2013
</label>
</div>
</div>
Add the activeclass to the button (labeltag) you want defaulted and checked=""to its inputtag so it gets submitted in the form by default.
将该active类添加到label您想要默认的按钮（标签）checked=""及其input标签，以便默认情况下在表单中提交。
回答by rawrkats
A javascript fix to apply the 'active' class to all labels that are parents of checked inputs:
将 'active' 类应用于作为已检查输入的父级的所有标签的 javascript 修复：
$(':input:checked').parent('.btn').addClass('active');
insert right after
紧随其后插入
$('.btn').button();
回答by Gi1ber7
You have to use active in the label to make it work as mentioned above. But you can use checked="checked" and it will work too. It's not necessary but it's more legible and makes more sense as it is more html format compliance.
您必须在标签中使用 active 才能使其按上述方式工作。但是您可以使用 checked="checked" 并且它也可以使用。这不是必需的，但它更清晰，更有意义，因为它更符合 html 格式。
回答by Cyclotron3x3
Use activeclass with labelto make it auto select and use checked="".
使用带标签的活动类使其自动选择和使用.checked=""
<label class="btn btn-primary active" value="regular" style="width:47%">
<input type="radio" name="service" checked="" > Regular </label>
<label class="btn btn-primary " value="express" style="width:46%">
<input type="radio" name="service"> Express </label>
