标志和视频导航栏应该响应
标志和视频导航栏应该响应
提问于 2018-12-14 05:50:49
我的问题是关于在视频上放置导航栏和徽标，它应该是响应它已经杀了我的时间像地狱。任何人都可以请帮助我，为什么这在所有屏幕上都没有响应。我想要在后台和视频中播放视频我希望导航栏位于顶部，而徽标位于所有屏幕的中心加上横向模式。我已经尝试了我的水平，但我失败了。因此，请在所有屏幕中查看并使其响应，有时候导航栏会自动消失。
#background {
width: 100%;
}
.main {
position: relative;
text-align: center;
}
.centered {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.btn {
border: none;
outline: none;
padding: 10px 16px;
background-color: none;
cursor: pointer;
}
.active,
.btn:hover {
background-color: #666;
color: white;
}
<!--Head-->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" integrity="sha384-9gVQ4dYFwwWSjIDZnLEWnxCjeSWFphJiwGPXr1jddIhOegiu1FwO5qRGvFXOdJZ4" crossorigin="anonymous">
<!--Body-->
<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav ml-auto" id="myDIV">
<li class="nav-item active">
<a class="nav-link btn" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link btn" href="#">Link</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle btn" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
</ul>
</div>
</nav>
<!-- Below Navbar -->
<div class="main">
<video autoplay loop muted id="background" class="mb-0">
<source src="video1.mp4">
</video>
<div class="centered">
<img src="http://www.clker.com/cliparts/5/e/2/9/1195435333236037637jeanmichel_logo2.svg.hi.png" width="80%" />
</div>
</div>
<!--Footer -->
<footer class="bg-danger" style="margin-top: -6px">
hello world
<br> hello world<br> hello world<br> hello world<br> hello world<br>
</footer>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
Stack Overflow用户
发布于 2018-12-14 15:02:45
#background {
width: 100%;
}
.main {
position: relative;
text-align: center;
}
.centered {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.btn {
border: none;
outline: none;
padding: 10px 16px;
background-color: none;
cursor: pointer;
}
.active,
.btn:hover {
background-color: #666;
color: white;
}
img, video {
width: 80%;
}<!--Head-->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" integrity="sha384-9gVQ4dYFwwWSjIDZnLEWnxCjeSWFphJiwGPXr1jddIhOegiu1FwO5qRGvFXOdJZ4" crossorigin="anonymous">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<!--Body-->
<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav ml-auto" id="myDIV">
<li class="nav-item active">
<a class="nav-link btn" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link btn" href="#">Link</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle btn" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
</ul>
</div>
</nav>
<!-- Below Navbar -->
<div class="main">
<video id="video1" controls="">
<source src="https://www.w3schools.com/html/mov_bbb.mp4" type="video/mp4">
<source src="https://www.w3schools.com/html/mov_bbb.ogg" type="video/ogg">
Your browser does not support HTML5 video.
</video>
<div class="centered">
<img src="http://www.clker.com/cliparts/5/e/2/9/1195435333236037637jeanmichel_logo2.svg.hi.png" />
</div>
</div>
<!--Footer -->
<footer class="bg-danger" style="margin-top: -6px">
hello world
<br> hello world<br> hello world<br> hello world<br> hello world<br>
</footer>页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/-100003073
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