Bootstrap 3.4 使用图片时的网格布局问题

Question

我正在学习制作简单相册的 bootstrap 教程。使用网格系统对我来说完全有意义，但是当我按照教程进行操作时，我得到了不同的结果。 3x3 网格中应该有 9 张图像，但由于某种原因，某些图像“pushed/pulled”不合适。感谢您的帮助。

代码：

<div class="container"> 
    <div class="row">   
            <div class="col-lg-4 "> <img class="img-thumbnail" src="https://images.unsplash.com/photo-1596877098462-fd1cfc6482c4?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60" alt=""></div>
            <div class="col-lg-4 "> <img class="img-thumbnail" src="https://images.unsplash.com/photo-1587712606457-20d42e24300e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60" alt=""></div>
            <div class="col-lg-4 "> <img class="img-thumbnail" src="https://images.unsplash.com/photo-1596716999716-544f09b06743?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60" alt=""></div>        
            <div class="col-lg-4 "> <img class="img-thumbnail" src="https://images.unsplash.com/photo-1596716999716-544f09b06743?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60" alt=""></div>        
            <div class="col-lg-4 "> <img class="img-thumbnail" src="https://images.unsplash.com/photo-1596716999716-544f09b06743?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60" alt=""></div>        
            <div class="col-lg-4 "> <img class="img-thumbnail" src="https://images.unsplash.com/photo-1596716999716-544f09b06743?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60" alt=""></div>
            <div class="col-lg-4 "> <img class="img-thumbnail" src="https://images.unsplash.com/photo-1596716999716-544f09b06743?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60" alt=""></div>        
            <div class="col-lg-4 "> <img class="img-thumbnail" src="https://images.unsplash.com/photo-1596716999716-544f09b06743?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60" alt=""></div>        
            <div class="col-lg-4 "> <img class="img-thumbnail" src="https://images.unsplash.com/photo-1596716999716-544f09b06743?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60" alt=""></div>
    </div>

</div>

Answer 1

最可能的原因是您忘记在代码中将 link 添加到 Bootstrap CDN。

<head>
    <meta charset="utf-8">
    <title>TRIALS</title>
    <link rel="stylesheet" href="master.css">
      <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
  </head>

此 link 适用于 Bootstrap 4.5，但您可以获得 link 到您的版本 here

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