Question

我是HTML和CSS的新手。请帮助我对齐我在下面的代码段中使用的图像和悬停效果（叠加和文本）。我正在使用FlexBox，但是如果弄乱对齐可能是我做错了。

＆＃13;

.container {
  position: relative;
  width: 50%;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  align-content: center;
}

h1 {
  text-align: center;
  font-size: 50px;
  color: Grey;
}

.image {
  display: block;
  width: 100%;
  height: auto;
}

.overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100%;
  width: 100%;
  opacity: 0;
  transition: .5s ease;
  background-color: #008CBA;
  border-radius: 10px;
}

.text {
  color: white;
  background-color: #008CBA;
  opacity: 0;
  border-radius: 25px;
  font-size: 100px;
  position: absolute;
  top: 50%;
  left: 50%;
  padding: 10px;
  transition: 0.8s ease;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  text-align: center;
}

.container:hover .overlay {
  opacity: 0.5;
}

.container:hover .text {
  opacity: 1;
}

＆＃13;

<h1>Overlay Effect</h1>
<div class="container">
  <img src="http://www.freepngimg.com/download/technology/7-2-technology-picture.png" alt="Avatar" class="image">
  <div class="overlay"></div>
  <div class="text">Hey Sup!</div>
</div>

＆＃13;

以下是相同

的codepen Link

Answer 1

您需要添加保证金：0自动;到您的容器类。这将使容器和图像集中在其中。

.container {
  margin: 0 auto;
  position: relative;
  width: 50%;
  display: flex;
  justify-content:  center;
  align-items: center;
  align-content: center;
}

h1{
  text-align: center;
  font-size: 50px;
  color: Grey;
}

.image {
  
  width: 100%;
  height: auto;
}

.overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100%;
  width: 100%;
  opacity: 0;
  transition: .5s ease;
  background-color: #008CBA;
  border-radius: 10px;
}

.text {
  color: white;
  background-color: #008CBA;
  opacity: 0;
  border-radius: 25px;
  font-size: 100px;
  position: absolute;
  top: 50%;
  left: 50%;
  padding: 10px;
  transition: 0.8s ease;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  text-align: center;
}

.container:hover .overlay {
  opacity: 0.5;
}

.container:hover .text {
  opacity: 1;
}

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <link rel="stylesheet" href="style.css">
  <title>Overlay</title>
</head>
<body>
  <h1>Overlay Effect</h1>
  <div class="container">
    <img src="http://www.freepngimg.com/download/technology/7-2-technology-picture.png" alt="Avatar" class="image">
    <div class="overlay"></div>
    <div class="text">Hey Sup!</div>
  </div>
</body>

Answer 2

您没有正确使用flex。我已经以正确的方式应用了这些变化。

.container {  
  display: flex;
  justify-content:  center;
  align-items: center;
  align-content: center;
}
.container > div {
  width: 50%;
  position: relative;
}

h1{
  text-align: center;
  font-size: 50px;
  color: Grey;
}

.image {
  
  width: 100%;
  height: auto;
}

.overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100%;
  width: 100%;
  opacity: 0;
  transition: .5s ease;
  background-color: #008CBA;
  border-radius: 10px;
}

.text {
  color: white;
  background-color: #008CBA;
  opacity: 0;
  border-radius: 25px;
  font-size: 100px;
  position: absolute;
  top: 50%;
  left: 50%;
  padding: 10px;
  transition: 0.8s ease;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  text-align: center;
}

.container > div:hover .overlay {
  opacity: 0.5;
}

.container > div:hover .text {
  opacity: 1;
}

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <link rel="stylesheet" href="style.css">
  <title>Overlay</title>
</head>
<body>
  

    <h1>Overlay Effect</h1>
  <div class="container">
    <div> 
      <img src="http://www.freepngimg.com/download/technology/7-2-technology-picture.png" alt="Avatar" class="image">
      <div class="overlay"></div>
      <div class="text">Hey Sup!</div>
    </div>
  </div>
</body>

如何将此图像和悬停效果居中？

2 个答案: