Question

我想创建一个拆分屏幕的Bootstrap 4页面，并将图像放置在与两列重叠的中心。我创建了两个相等的列，但是我不知道如何放置图像使其重叠。

我尝试过position:absolute和float:left，但没有帮助。谢谢您的帮助！

预期： Photo

html,
body {
  height: 100%;
  margin: 0;
}

body {
  overflow-x: hidden;
}

col {
  height: 100vh;
}

img {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

<!DOCTYPE html>
<html lang="en">

<head>
  <title>Website</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
  <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js" integrity="sha384-wHAiFfRlMFy6i5SRaxvfOCifBUQy1xHdJ/yoi7FRNXMRBu5WHdZYu1hA6ZOblgut" crossorigin="anonymous"></script>
  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js" integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k" crossorigin="anonymous"></script>
</head>

<body>
  <img src="https://imgur.com/Qk5Qa9M.jpg" class="mx-auto d-block" style="width:auto">
  <div class="row h-100">
    <div class="col" style="background-color:blue">
      Left
    </div>
    <div class="col" style="background-color:red">
      Right
    </div>
  </div>
</body>

</html>

Answer 1

只需将z-index添加到您的img类中

z-index属性指定元素的堆叠顺序。具有较高堆叠顺序的元素始终位于具有较低堆叠顺序的元素之前。

注意：z-index仅适用于定位的元素（position：absolute，position：relative或position：fixed）

html,
body {
  height: 100%;
  margin: 0;
}

body {
  overflow: hidden;
}

col {
  height: 100vh;
}

img {
  position: absolute;
  top: 15%;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1001;
  height: 100%;
}

<!DOCTYPE html>
<html lang="en">

<head>
  <title>Website</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
  <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js" integrity="sha384-wHAiFfRlMFy6i5SRaxvfOCifBUQy1xHdJ/yoi7FRNXMRBu5WHdZYu1hA6ZOblgut" crossorigin="anonymous"></script>
  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js" integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k" crossorigin="anonymous"></script>
</head>

<body>
  <img src="https://imgur.com/Qk5Qa9M.jpg" class="mx-auto d-block" style="width:auto">
  <div class="row h-100">
    <div class="col" style="background-color:blue">
      Left
    </div>
    <div class="col" style="background-color:red">
      Right
    </div>
  </div>
</body>

</html>

Answer 2

在您的z-index: 1; CSS中添加img

img {
  z-index: 1;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

Answer 3

这正在解决您的问题：

html,
body {
  height: 100%;
  margin: 0;
}

body {
  overflow-x: hidden;
}

col {
  height: 100vh;
}

img {
  position: absolute;
  bottom: 0; /* i deleted top:0; */
  left: 50%; /* this and below code for excellent centered */
  transform:translateX(-50%);
  z-index:2;
}

<!DOCTYPE html>
<html lang="en">

<head>
  <title>Website</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
  <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js" integrity="sha384-wHAiFfRlMFy6i5SRaxvfOCifBUQy1xHdJ/yoi7FRNXMRBu5WHdZYu1hA6ZOblgut" crossorigin="anonymous"></script>
  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js" integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k" crossorigin="anonymous"></script>
</head>

<body>
  <img src="https://picsum.photos/400/500">
  <div class="row h-100">
    <div class="col" style="background-color:blue">
      Left
    </div>
    <div class="col" style="background-color:red">
      Right
    </div>
  </div>
</body>

</html>

我也从class标记中删除了style和img属性。因为他们没有必要。

如何在引导程序中将图像居中2列

3 个答案: