定位div容器

问题描述

.containerBigOverview{
    display: block;
    position: absolute;
    margin: 3%;
    padding-bottom: 0;
    background-color:red;
}
.containerOverview {
  position: relative;
  width: 31%;
  margin: 1%;
  float: left;
}

@media screen and (max-width: 600px) {
    .containerOverview {
      position: relative;
      width: 100%;
      width: 100%;
      margin: 3%;
      float: none;
    }
}
.image {
  display: block;
  width: 100%;
  height: auto;
}

.overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgb(176,224,230,0.9);
  overflow: hidden;
  width: 100%;
  height: 0;
  transition: .5s ease;
}

.containerOverview:hover .overlay {
  height: 50%;
}

.text {
  color: white;
  font-size: 20px;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%,-50%);
  -ms-transform: translate(-50%,-50%);
  transform: translate(-50%,-50%);
  text-align: center;
}

/* FOOTER */

.footer {
    position:absolute;
    width:100%;
    background-color: #aaa;
    color: white;
    padding: 2%;
}

.footer a{
    text-decoration: none;
    color:white;
    padding: 1%;
}
<p>Hover over the image to see the effect.</p>
<div class="containerBigOverview">
    <div class="containerOverview">
      <img src="https://gradle.org/images/gradle-400x400.png" alt="Forbildung1" class="image">
      <div class="overlay">
        <div class="text">Hello World</div>
      </div>
    </div>
    <div class="containerOverview">
      <img src="https://gradle.org/images/gradle-400x400.png" alt="Forbildung2" class="image">
      <div class="overlay">
        <div class="text">Hello World 2</div>
      </div>
    </div>
    <div class="containerOverview">
      <img src="https://gradle.org/images/gradle-400x400.png" alt="Forbildung3" class="image">
      <div class="overlay">
        <div class="text">Hello World 3</div>
      </div>
    </div>
</div>
    

<div class="footer">
    <a href="impressum.html"> Impressum </a>
    <a href="datenschutz.html"> Datenschutz </a>
</div>

我正在尝试建立一个网站。 一个问题出现了: 我有一个用于页脚的div,一个div是包含图像的几个div的容器。 现在,页脚显示在我的图像容器上,我不知道为什么。

enter image description here

如果我删除位置:亲戚,则我的页脚包含图像容器。

enter image description here

解决方法

我找到的最简单的解决方案是使用display: flex将所有容器转换为Flexbox。 Flexbox比块显示更清晰-试试看。 另外,HTML <footer>中的页脚有一个特殊标记,因此您无需创建新类。 这是固定代码:https://codepen.io/wiszuc/pen/RwaRLQK

,

如果您从页脚中删除了position: relative,则该位置默认为position: static,在这种情况下,这就是您可能会看到的叠加效果。

根据您要实现的目标,可以使用不同的positioning

通常在页脚中可以使用:

.footer {
  position: fixed;
  bottom: 0;
}

以将其附加到页面底部。


完整的示例:

body {
  min-height: 20rem;
}
.containerBigOverview{
  display: flex;
  postion: relative;
  justify-content: center;
  margin: 3%;
  padding-bottom: 0;
  background-color:red;
}
.containerOverview {
  position: relative;
  display: flex;
  justify-content: space-evenly;
  width: 31%;
  margin: 1%;
}

@media screen and (max-width: 600px) {
  .containerOverview {
    position: relative;
    width: 100%;
    width: 100%;
    margin: 3%;
    float: none;
  }
}
.svg {
  display: block;
  width: 100%;
  height: auto;
}

.overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgb(176,224,230,0.9);
  overflow: hidden;
  width: 100%;
  height: 0;
  transition: .5s ease;
}

.containerOverview:hover .overlay {
  height: 50%;
}

.text {
  color: white;
  font-size: 20px;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%,-50%);
  -ms-transform: translate(-50%,-50%);
  transform: translate(-50%,-50%);
  text-align: center;
}

/* FOOTER */

.footer {
  position: fixed;
  bottom: 0;
  width:100%;
  background-color: #aaa;
  color: white;
  padding: 2%;
}

.footer a{
  text-decoration: none;
  color:white;
  padding: 1%;
}
<div class="containerBigOverview">
        <div class="containerOverview">
          <svg width="10em" height="1oem" viewBox="0 0 16 16" class="bi bi-alarm-fill" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
  <path fill-rule="evenodd" d="M5.5.5A.5.5 0 0 1 6 0h4a.5.5 0 0 1 0 1H9v1.07a7.002 7.002 0 0 1 3.537 12.26l.817.816a.5.5 0 0 1-.708.708l-.924-.925A6.967 6.967 0 0 1 8 16a6.967 6.967 0 0 1-3.722-1.07l-.924.924a.5.5 0 0 1-.708-.708l.817-.816A7.002 7.002 0 0 1 7 2.07V1H5.999a.5.5 0 0 1-.5-.5zM.86 5.387A2.5 2.5 0 1 1 4.387 1.86 8.035 8.035 0 0 0 .86 5.387zM13.5 1c-.753 0-1.429.333-1.887.86a8.035 8.035 0 0 1 3.527 3.527A2.5 2.5 0 0 0 13.5 1zm-5 4a.5.5 0 0 0-1 0v3.882l-1.447 2.894a.5.5 0 1 0 .894.448l1.5-3A.5.5 0 0 0 8.5 9V5z"/>
</svg>
          <div class="overlay">
            <div class="text">Hello World</div>
          </div>
        </div>
        <div class="containerOverview">
          <svg width="10em" height="1oem" viewBox="0 0 16 16" class="bi bi-alarm-fill" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
  <path fill-rule="evenodd" d="M5.5.5A.5.5 0 0 1 6 0h4a.5.5 0 0 1 0 1H9v1.07a7.002 7.002 0 0 1 3.537 12.26l.817.816a.5.5 0 0 1-.708.708l-.924-.925A6.967 6.967 0 0 1 8 16a6.967 6.967 0 0 1-3.722-1.07l-.924.924a.5.5 0 0 1-.708-.708l.817-.816A7.002 7.002 0 0 1 7 2.07V1H5.999a.5.5 0 0 1-.5-.5zM.86 5.387A2.5 2.5 0 1 1 4.387 1.86 8.035 8.035 0 0 0 .86 5.387zM13.5 1c-.753 0-1.429.333-1.887.86a8.035 8.035 0 0 1 3.527 3.527A2.5 2.5 0 0 0 13.5 1zm-5 4a.5.5 0 0 0-1 0v3.882l-1.447 2.894a.5.5 0 1 0 .894.448l1.5-3A.5.5 0 0 0 8.5 9V5z"/>
</svg>
          <div class="overlay">
            <div class="text">Hello World 2</div>
          </div>
        </div>
        <div class="containerOverview">
          <svg width="10em" height="1oem" viewBox="0 0 16 16" class="bi bi-alarm-fill" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
  <path fill-rule="evenodd" d="M5.5.5A.5.5 0 0 1 6 0h4a.5.5 0 0 1 0 1H9v1.07a7.002 7.002 0 0 1 3.537 12.26l.817.816a.5.5 0 0 1-.708.708l-.924-.925A6.967 6.967 0 0 1 8 16a6.967 6.967 0 0 1-3.722-1.07l-.924.924a.5.5 0 0 1-.708-.708l.817-.816A7.002 7.002 0 0 1 7 2.07V1H5.999a.5.5 0 0 1-.5-.5zM.86 5.387A2.5 2.5 0 1 1 4.387 1.86 8.035 8.035 0 0 0 .86 5.387zM13.5 1c-.753 0-1.429.333-1.887.86a8.035 8.035 0 0 1 3.527 3.527A2.5 2.5 0 0 0 13.5 1zm-5 4a.5.5 0 0 0-1 0v3.882l-1.447 2.894a.5.5 0 1 0 .894.448l1.5-3A.5.5 0 0 0 8.5 9V5z"/>
</svg>
          <div class="overlay">
            <div class="text">Hello World 3</div>
          </div>
        </div>
    </div>
        
    
<div class="footer">
    <a href="impressum.html"> Impressum </a>
    <a href="datenschutz.html"> Datenschutz </a>
</div>

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