CSS加载屏幕问题

Question

我试图在用户的某个动作之后显示加载区域.我想在屏幕中央显示加载动画,同时在后台显示页面的其余部分显示为灰色.

在这一点上,我的问题是加载动画也是灰色的,我只是想让背景变灰.白框应该是不透明的,但也有点透明.有帮助吗？

$('input[type=button]').click(function() {
  $("#shader").fadeIn();
});

.loadingContainer {
    width: 50%;
    height: 50%;
    overflow: auto;
    margin: auto;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

.shader {
    width: 100%;
    height: 100%;
    background-color: black;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    position: fixed;
    opacity: 0.5;
    display: none;
}

#divLoading3 {
    border-radius: 40px;
    margin: auto;
    overflow: hidden;
    width: 100%;
    height: 100%;
    background-color: white;
}

#loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
}

#loader {
    display: block;
    position: relative;
    left: 50%;
    top: 50%;
    width: 150px;
    height: 150px;
    margin: -75px 0 0 -75px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #3498db;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
}

#loader:before {
    content:"";
    position: absolute;
    top: 5px;
    left: 5px;
    right: 5px;
    bottom: 5px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #e74c3c;
    -webkit-animation: spin 3s linear infinite;
    animation: spin 3s linear infinite;
}

#loader:after {
    content:"";
    position: absolute;
    top: 15px;
    left: 15px;
    right: 15px;
    bottom: 15px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #f9c922;
    -webkit-animation: spin 1.5s linear infinite;
    animation: spin 1.5s linear infinite;
}

@-webkit-keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

@keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<input type="button" value="load button">
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>

<div id="shader" class="shader">
  <div class="loadingContainer">
    <div id="divLoading3">
      <div id="loader-wrapper">
        <div id="loader"></div>
      </div>
    </div>
  </div>
</div>

查看整页以获得更好的视图

Answer 1

background-color: rgba(0, 0, 0, 0.65);使用不透明度的RGB 背景

你已经添加了opacity，所以孩子们也会inherit这么做

演示 - http://jsfiddle.net/kw7302rb/

.shader {
    width: 100%;
    height: 100%;
    background-color: black; /** change it to this background-color: rgba(0, 0, 0, 0.65) **/
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    position: fixed;
    opacity: 0.5; /** you can remove this **/
    display: none;
}

.shader {
    width: 100%;
    height: 100%;
    background-color: black; /** change it to this background-color: rgba(0, 0, 0, 0.65) **/
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    position: fixed;
    opacity: 0.5; /** you can remove this **/
    display: none;
}

$('input[type=button]').click(function() {
  $("#shader").fadeIn();
});

.loadingContainer {
    width: 50%;
    height: 50%;
    overflow: auto;
    margin: auto;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

.shader {
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.65);
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    position: fixed;
    display: none;
}

#divLoading3 {
    border-radius: 40px;
    margin: auto;
    overflow: hidden;
    width: 100%;
    height: 100%;
    background-color: white;
}

#loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
}

#loader {
    display: block;
    position: relative;
    left: 50%;
    top: 50%;
    width: 150px;
    height: 150px;
    margin: -75px 0 0 -75px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #3498db;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
}

#loader:before {
    content:"";
    position: absolute;
    top: 5px;
    left: 5px;
    right: 5px;
    bottom: 5px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #e74c3c;
    -webkit-animation: spin 3s linear infinite;
    animation: spin 3s linear infinite;
}

#loader:after {
    content:"";
    position: absolute;
    top: 15px;
    left: 15px;
    right: 15px;
    bottom: 15px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #f9c922;
    -webkit-animation: spin 1.5s linear infinite;
    animation: spin 1.5s linear infinite;
}

@-webkit-keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

@keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

或者类似的东西

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<input type="button" value="load button">
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>

<div id="shader" class="shader">
  <div class="loadingContainer">
    <div id="divLoading3">
      <div id="loader-wrapper">
        <div id="loader"></div>
      </div>
    </div>
  </div>
</div>

$('input[type=button]').click(function() {
  $("#shader").fadeIn();
});

.loadingContainer {
    width: 50%;
    height: 50%;
    overflow: auto;
    margin: auto;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

.shader {
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.65);
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    position: fixed;
    display: none;
}

#divLoading3 {
    border-radius: 40px;
    margin: auto;
    overflow: hidden;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.65);
}

#loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
}

#loader {
    display: block;
    position: relative;
    left: 50%;
    top: 50%;
    width: 150px;
    height: 150px;
    margin: -75px 0 0 -75px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #3498db;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
}

#loader:before {
    content:"";
    position: absolute;
    top: 5px;
    left: 5px;
    right: 5px;
    bottom: 5px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #e74c3c;
    -webkit-animation: spin 3s linear infinite;
    animation: spin 3s linear infinite;
}

#loader:after {
    content:"";
    position: absolute;
    top: 15px;
    left: 15px;
    right: 15px;
    bottom: 15px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #f9c922;
    -webkit-animation: spin 1.5s linear infinite;
    animation: spin 1.5s linear infinite;
}

@-webkit-keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

@keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

另一种解决方案是你可以添加一个额外div的opacity

html

<div id="shader" class="shader">
    <div class="overlay"></div>  <!-- new div added which will act as greyed background -->
    <div class="loadingContainer">
        <div id="divLoading3">
            <div id="loader-wrapper">
                <div id="loader"></div>
            </div>
        </div>
    </div>
</div>

CSS

.overlay {
    background-color: black;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    opacity:.5;
    position: fixed;
}

演示 - http://jsfiddle.net/kw7302rb/3/

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<input type="button" value="load button">
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>
<p>background contents background contents background contents</p>

<div id="shader" class="shader">
  <div class="loadingContainer">
    <div id="divLoading3">
      <div id="loader-wrapper">
        <div id="loader"></div>
      </div>
    </div>
  </div>
</div>

<div id="shader" class="shader">
    <div class="overlay"></div>  <!-- new div added which will act as greyed background -->
    <div class="loadingContainer">
        <div id="divLoading3">
            <div id="loader-wrapper">
                <div id="loader"></div>
            </div>
        </div>
    </div>
</div>

.overlay {
    background-color: black;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    opacity:.5;
    position: fixed;
}