twitter-bootstrap-3 – Bootstrap Glyphicons没有显示

我正在使用bootstrap 3并且我将一个Glyphicons与输入文本放在一起并且Glyphicons没有显示(但是btn-info显示)我正在使用：class =“input-group”来包含glyphicon,输入文本和提交按钮.

这是代码：

<body>
    <nav class="navbar navbar-default" role="navigation">
        <div class="container">
            <!-- Brand and toggle get grouped for better mobile display -->
            <div class="navbar-header">
                <button class="navbar-toggle" type="button" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"> 
                    <span class="sr-only">Toggle navigation</span> 
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button> 
                <a class="navbar-brand" href="#">Meu Site</a>
            </div>
            <!-- Collect the nav links,forms,and other content for toggling -->
            <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
                <ul class="nav navbar-nav navbar-right">
                    <li><a href="#">News</a></li>
                    <li><a href="#">Login</a></li>
                    <li><a href="#">Create Account</a></li>
                </ul>
            </div><!-- /.navbar-collapse -->
        </div><!-- /.container -->
    </nav>
 
    <div class="container">
        <div class="row">
            <div class="span7 text-center col-md-4 col-md-offset-3" style="float: none; margin-left: auto;margin-right: auto;">
                <img src="../../app.images/logo.jpg" />
            </div>
            <form class="span7 text-center col-md-4 col-md-offset-3" style="float: none; margin-left: auto;margin-right: auto;" role="search">
                <div class="form-group">
                    <label class="radio-inline"><input type="radio" name="optradio">Opt1</label>
                    <label class="radio-inline"><input type="radio" name="optradio" checked="">Opt2</label>
                    <label class="radio-inline"><input type="radio" name="optradio">Opt3</label>
                </div>
 
                <div class="input-group">
                    <a href="#" class="btn btn-info input-group-btn">
                      <span class="glyphicon glyphicon-th"></span>
                    </a>
                    <input class="form-control " type="text" placeholder="Search" />
                    <div class="input-group-btn">
                        <button class="btn btn-default" type="submit">Search</button>
                    </div>
                </div>
            </form>
            <div class="span7 text-center col-md-4 col-md-offset-3" style="float: none; margin-left: auto;margin-right: auto;">
                Slogan
            </div>
            <div class="span7 text-center col-md-4 col-md-offset-3" style="float: none; margin-left: auto;margin-right: auto;">
                <a href="#">Mobile</a>
                <a href="#">Addons</a>
                <a href="#">Contact</a>
            </div>
        </div>
    </div>
</body>

解决方法

似乎是由.input-group-btn引起的.有一个规则将此元素的font-size设置为0.使用以下方法添加样式规则：

div.container a.input-group-btn {
    font-size: 14px;
}

Working sample

twitter-bootstrap-3 – Bootstrap Glyphicons没有显示

解决方法

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