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html - 绝对位置会导致图像变得比原来更大吗？

问题描述

我试图让div 与使用 z-index#features的部分重叠。.title-image当我将.title-image位置设置为绝对时，图像变得比以前大。我的问题是，如果.title-image包含在一个名为的 div 中col-lg-6，并且已经添加了尺寸尺寸，那么即使图像包含在 div 中，尺寸也会被丢弃吗？我使用了另一张图片，.title-image这样您就可以看到我正在经历的事情。我究竟做错了什么？

#title {
  background-color: #ff4c68;
  color: #fff;
}

body {
  font-family: 'Montserrat';
  font-weight: normal;
}

h1 {
  font-family: 'Montserrat';
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.5;
}

h2 {
  font-family: 'Montserrat';
  font-weight: bold;
  font-size: 3rem;
  line-height: 1.5;
}

h3 {
  font-family: 'Montserrat';
  font-weight: bold;
}

p {
  color: #8f8f8f;
}

.container-fluid {
  padding: 3% 15%;
}


/* Navigation Bar */

.navbar {
  padding: 0 0 4.5rem;
}

.navbar-brand {
  font-family: 'Ubuntu';
  font-size: 2.5rem;
  font-weight: bold;
}

.nav-item {
  padding: 0 18px;
}

.nav-link {
  font-size: 1.2rem;
  font-family: 'Montserrat';
  font-weight: 400;
}


/* Download Buttons */

.download-button {
  margin: 5% 3% 5% 0;
}


/* Title Image */

.title-image {
  width: 60%;
  transform: rotate(25deg);
  position: absolute;
}

#features {
  padding: 7% 15%;
  background-color: #fff;
  position: relative;
  z-index: 1;
}

.features-box {
  text-align: center;
  padding: 5%;
}

.icon {
  color: #ef8172;
  margin-bottom: 1rem;
}

.icon:hover {
  color: #ff4c68;
}


/* Testimonial Section */

#testimonials {
  text-align: center;
  background-color: #ef8172;
  color: #fff;
}

.testimonial-image {
  width: 10%;
  border-radius: 100%;
  margin: 20px;
}

#press {
  background-color: #ef8172;
  text-align: center;
  padding-bottom: 3%;
}

.press-logo {
  width: 15%;
  margin: 20px 20px 50px;
}

.carousel-item {
  padding: 7% 15%;
}


/* Pricing */

#pricing {
  padding: 100px;
}

.sign-up {
  margin-top: 35px;
}

.pricing-column {
  padding: 3% 2%;
}
<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>TinDog</title>

  <!-- Google Fonts -->
  <link href="https://fonts.googleapis.com/css2?family=Montserrat:wght@100;400;900&family=Ubuntu:wght@300;400;700&display=swap" rel="stylesheet">

  <!-- CSS Stylesheet -->
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-KyZXEAg3QhqLMpG8r+8fhAXLRk2vvoC2f3B09zVXn8CA5QIVfZOJ3BCsw2P0p/We" crossorigin="anonymous">
  <link rel="stylesheet" href="css/styles.css">

  <!-- Font Awesome -->
  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.15.4/css/all.css" integrity="sha384-DyZ88mC6Up2uqS4h/KRgHuoeGwBcD4Ng9SiP4dIRy0EXTlnuz47vAwmeGwVChigm" crossorigin="anonymous">

  <!-- Bootstrap script -->
  <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.2/dist/umd/popper.min.js" integrity="sha384-IQsoLXl5PILFhosVNubq5LC7Qb9DXgDA9i+tQ8Zj3iwWAwPtgFTxbJ8NT4GN1R8p" crossorigin="anonymous"></script>
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.min.js" integrity="sha384-cVKIPhGWiC2Al4u+LWgxfKTRIcfu0JTxR+EQDz/bgldoEyl4H0zUF0QKbrJ0EcQF" crossorigin="anonymous"></script>
</head>

<body>

  <section id="title">
    <div class="container-fluid">

      <!-- Nav Bar -->
      <nav class="navbar navbar-expand-lg navbar-dark">
        <a class="navbar-brand" href="">TinDog</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>

        <div class="collapse navbar-collapse" id="navbarNavDropdown">

          <ul class="navbar-nav ms-auto">
            <li class="nav-item">
              <a class="nav-link" href="">Contact</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="">Pricing</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="">Download</a>
            </li>
          </ul>
        </div>
      </nav>




      <!-- Title -->

      <div class="row">
        <div class="col-lg-6">
          <h1>Meet new and interesting dogs nearby</h1>
          <button type="button" class="btn btn-lg btn-dark download-button"><i class="fab fa-google-play"></i> Download</button>
          <button type="button" class="btn btn-lg btn-outline-light download-button"><i class="fab fa-apple"></i> Download</button>
        </div>

        <div class="col-lg-6">
          <img class="title-image" src="https://img.favpng.com/18/8/0/iphone-6s-plus-iphone-6-plus-apple-iphone-6s-png-favpng-2qagf951EWF4xaNNGb9WBPdNZ.jpg" alt="iphone-mockup">
        </div>

      </div>
    </div>

  </section>


  <!-- Features -->

  <section id="features">
    <div class="row">

      <div class="features-box col-lg-4">
        <i class="icon fas fa-check-circle fa-4x"></i>
        <h3>Easy to use</h3>
        <p>So easy to use, even your dog could do it.</p>

      </div>

      <div class="features-box col-lg-4">
        <i class="icon fas fa-bullseye fa-4x"></i>
        <h3>Elite Clientele</h3>
        <p>We have all the dogs, the greatest dogs.</p>

      </div>

      <div class="features-box col-lg-4">
        <i class="icon fas fa-heart fa-4x"></i>
        <h3>Guaranteed to work</h3>
        <p>Find the love of your dog's life or your money back.</p>

      </div>

    </div>







  </section>


  <!-- Testimonials -->

  <section id="testimonials">

    <div id="testimonial-carousel" class="carousel slide" data-bs-ride="false" data-bs-pause="hover">
      <div class="carousel-inner">
        <div class="carousel-item active">
          <h2>I no longer have to sniff other dogs for love. I've found the hottest Corgi on TinDog. Woof.</h2>
          <img class="testimonial-image" src="images/dog-img.jpg" alt="dog-profile">
          <em>Pebbles, New York</em>
        </div>
        <div class="carousel-item">
          <h2 class="testimonial-text">My dog used to be so lonely, but with TinDog's help, they've found the love of their life. I think.</h2>
          <img class="testimonial-image" src="images/lady-img.jpg" alt="lady-profile">
          <em>Beverly, Illinois</em>
        </div>

      </div>
      <button class="carousel-control-prev" type="button" data-bs-target="#testimonial-carousel" data-bs-slide="prev">
    <span class="carousel-control-prev-icon"></span>
    <span class="visually-hidden">Previous</span>
  </button>
      <button class="carousel-control-next" type="button" data-bs-target="#testimonial-carousel" data-bs-slide="next">
    <span class="carousel-control-next-icon"></span>
    <span class="visually-hidden">Next</span>
  </button>
    </div>





  </section>


  <!-- Press -->

  <section id="press">
    <img class="press-logo" src="images/techcrunch.png" alt="tc-logo">
    <img class="press-logo" src="images/tnw.png" alt="tnw-logo">
    <img class="press-logo" src="images/bizinsider.png" alt="biz-insider-logo">
    <img class="press-logo" src="images/mashable.png" alt="mashable-logo">

  </section>


  <!-- Pricing -->

  <section id="pricing">

    <h2>A Plan for Every Dog's Needs</h2>
    <p>Simple and affordable price plans for your and your dog.</p>

    <div class="row text-center">
      <div class="pricing-column col-lg-4 col-md-6">

        <div class="card h-100">
          <div class="card-header">
            <h3>Chihuahua</h3>
          </div>
          <div class="card-body">
            <h2>Free</h2>
            <p>5 Matches Per Day</p>
            <p>10 Messages Per Day</p>
            <p>Unlimited App Usage</p>
            <button type="button" class="sign-up w-100 btn btn-lg btn-outline-dark">Sign Up</button>
          </div>

        </div>
      </div>



      <div class="pricing-column col-lg-4 col-md-6">

        <div class="card h-100">
          <div class="card-header">
            <h3>Labrador</h3>
          </div>
          <div class="card-body">
            <h2>$49 / mo</h2>
            <p>Unlimited Matches</p>
            <p>Unlimited Messages</p>
            <p>Unlimited App Usage</p>
            <button type="button" class="sign-up w-100 btn btn-lg btn-dark">Sign Up</button>
          </div>

        </div>
      </div>



      <div class="pricing-column col-lg-4">
        <div class="card h-100">
          <div class="card-header">
            <h3>Mastiff</h3>
          </div>
          <div class="card-body">
            <h2>$99 / mo</h2>
            <p>Pirority Listing</p>
            <p>Unlimited Matches</p>
            <p>Unlimited Messages</p>
            <p>Unlimited App Usage</p>
            <button type="button" class="w-100 btn btn-lg btn-dark">Sign Up</button>
          </div>

        </div>
      </div>

    </div>







  </section>


  <!-- Call to Action -->

  <section id="cta">

    <h3>Find the True Love of Your Dog's Life Today.</h3>
    <button type="button">Download</button>
    <button type="button">Download</button>

  </section>


  <!-- Footer -->

  <footer id="footer">

    <p>© Copyright 2018 TinDog</p>

  </footer>


</body>

</html>

标签： htmlcssbootstrap-4

解决方案

这是浏览器打开absolute或fixed定位的默认行为。虽然它仍在容器内div，但width: 60%on.title-image不再影响它，因为它无法找到任何位置设置为relativeor的父元素absolute。

请记住，这些值将相对于具有相对（或绝对）定位的下一个父元素。如果没有这样的父元素，它将默认一直回到元素本身，这意味着它将相对于页面本身放置。

关于绝对定位的权衡（也是要记住的最重要的事情）是这些元素从页面上的元素流中删除。具有这种定位的元素不受其他元素的影响，也不会影响其他元素。每次使用绝对定位时都要考虑这一点。它的过度使用或不当使用会限制您网站的灵活性。

https://css-tricks.com/absolute-relative-fixed-positioining-how-do-they-differ/#absolute

如果您想要将.title-image相对位置定位到其父级，则div必须将其（父级div）位置设置为relativeor absolute。

示例：https ://jsfiddle.net/o9wjrcd7/

希望有帮助！

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