bootstrap 4转盘标题在小设备上不可见

Question

我正在练习http://v4-alpha.getbootstrap.com/examples/中给出的bootstrap 4 carousal示例。当测试移动设备或小屏幕时，carousal标题不可见。请任何帮助。

<div id="myCarousel" class="carousel slide" data-ride="carousel"> 
<ol class="carousel-indicators"> 
<li data-target="#myCarousel" data-slide-to="0" class="active"></li> 
<li data-target="#myCarousel" data-slide-to="1"></li> 
<li data-target="#myCarousel" data-slide-to="2"></li> 
</ol> 
<div class="carousel-inner" role="listbox"> 
<div class="carousel-item active"> 
<img class="first-slide" src="data:image/gif;base64,R0lGODlhAQABAIAAAHd3dwAAACH5BAAAAAAALAAAAAABAAEAAAICRAEAOw==" alt="First slide"> 
<div class="container"> 
<div class="carousel-caption d-none d-md-block text-left"> 
<h1>Example headline.</h1> 
<p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p> 
<p><a class="btn btn-lg btn-primary" href="#" role="button">Sign up today</a></p> 
</div> 
</div> 
</div> 
<div class="carousel-item"> 
<img class="second-slide" src="data:image/gif;base64,R0lGODlhAQABAIAAAHd3dwAAACH5BAAAAAAALAAAAAABAAEAAAICRAEAOw==" alt="Second slide"> 
<div class="container"> 
<div class="carousel-caption d-none d-md-block"> 
<h1>Another example headline.</h1> 
<p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p> 
<p><a class="btn btn-lg btn-primary" href="#" role="button">Learn more</a></p> 
</div> 
</div> 
</div> 
<div class="carousel-item"> 
<img class="third-slide" src="data:image/gif;base64,R0lGODlhAQABAIAAAHd3dwAAACH5BAAAAAAALAAAAAABAAEAAAICRAEAOw==" alt="Third slide"> 
<div class="container"> 
<div class="carousel-caption d-none d-md-block text-right"> 
<h1>One more for good measure.</h1> 
<p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p> 
<p><a class="btn btn-lg btn-primary" href="#" role="button">Browse gallery</a></p> 
</div> 
</div> 
</div> 
</div> 
<a class="carousel-control-prev" href="#myCarousel" role="button" data-slide="prev"> 
<span class="carousel-control-prev-icon" aria-hidden="true"></span> 
<span class="sr-only">Previous</span> 
</a> 
<a class="carousel-control-next" href="#myCarousel" role="button" data-slide="next"> 
<span class="carousel-control-next-icon" aria-hidden="true"></span> 
<span class="sr-only">Next</span> 
</a> 
</div> 

Answer 1

卸下类从所有carousel-caption类d-none d-md-block，类d-none给出了标题无的显示和类d-md-block给它MD和上述屏幕块的显示。

注意：如果字幕中有很多文字，则可能需要在较小的屏幕上调整文字大小以使所有内容都适合。