Question

我有这个HTML标记：

    <div class="media-container">
        <iframe width="365" height="200" src="https://www.youtube.com/embed/JqjIb6FhU_k" frameborder="0" allowfullscreen></iframe>
    </div>

使用以下css：

.media-container {
    position: fixed;
    right: 28px;
    bottom: 77px;
    width: 340px;
    height: 200px;
    border-radius: 7px 7px 0 0;
    overflow: hidden;
    text-align: center;
    iframe {
        margin-left: -16px;
    }
}

.media-container:after, .media-container:before {
    bottom: 0%;
    left: 0%;
    border: solid transparent;
    content: " ";
    height: 0;
    width: 164px;
    position: absolute;
    pointer-events: none;
}

.media-container:after {
    border-color: rgba(255, 255, 255, 0);
    border-bottom-color: #fff;
    border-width: 16px;
    margin-left: -16px;
}

.media-container:before {
    border-color: rgba(245, 41, 34, 0);
    border-bottom-color: #fff;
    border-width: 16px;
    margin-left: 175px;
}

我想在视频的底部也有圆角，就像在顶部一样。问题是我使用伪元素在底部绘制箭头，我很难在这个设置中围绕底角。

任何人都知道如何解决这个问题？

谢谢！

Answer 1

通过添加另一个元素并使用框阴影，您可以创建背景颜色的“反边框”，屏蔽您的视频。请参阅下面的元素“.bottom-borders”：

.media-container {
    position: relative;
    width: 340px;
    height: 200px;
    border-radius: 7px 7px 0 0;
    overflow: hidden;
    text-align: center;
}
iframe {
    margin-left: -16px;
}
.media-container:after, .media-container:before {
    bottom: 0%;
    left: 0%;
    border: solid transparent;
    content:" ";
    height: 0;
    width: 164px;
    position: absolute;
    pointer-events: none;
}
.media-container:after {
    border-color: rgba(255, 255, 255, 0);
    border-bottom-color: #fff;
    border-width: 16px;
    margin-left: -16px;
}
.media-container:before {
    border-color: rgba(245, 41, 34, 0);
    border-bottom-color: #fff;
    border-width: 16px;
    margin-left: 175px;
}
.bottom-borders {
    height: 7px;
    position: absolute;
    bottom: 16px;
    width: 100%;
}
.bottom-borders:before,
.bottom-borders:after {
    content: "";
    position: absolute;
    top: 0;
    width: 7px;
    height: 7px;
}
.bottom-borders:before {
    left: 0;
    border-bottom-left-radius: 7px;
    box-shadow: -3.5px 3.5px 0 3.5px white;
}
.bottom-borders:after {
    right: 0;
    border-bottom-right-radius: 7px;
    box-shadow: 3.5px 3.5px 0 3.5px white;
}

<div class="media-container">
    <iframe width="365" height="200" src="https://www.youtube.com/embed/JqjIb6FhU_k" frameborder="0" allowfullscreen></iframe>
    <div class="bottom-borders"></div>
</div>

Answer 2

我坚持使用一个伪元素的阴影和另一个伪元素的渐变 - 不需要那种额外的真实元素。这是小提琴：https://jsfiddle.net/gb8h983r/1/

.media-container {
    position: relative;
    width: 340px;
    height: 200px;
    overflow: hidden;
    border-radius: 7px 7px 0 0;
}

.media-container iframe {
    width: 110%;
    height: 110%;
    margin-left: -5%;
}

.media-container:after, .media-container:before {
    content: "";
    position: absolute;
    pointer-events: none;
}

.media-container:after {
    right: 0;
    left: 0;
    bottom: 16px;
    height: 14px;

    border-radius: 7px;
    box-shadow: -333px 7px #ffffff, 333px 7px #ffffff;
    /* 333px = 340px -7px */
}

.media-container:before {
    right: 0;
    bottom: 0;
    left: 0;
    height: 16px;

    background:
        linear-gradient(45deg, rgba(255,255,255,1) 0%, rgba(255,255,255,1) 49.99%, rgba(255,255,255,0) 50%, rgba(255,0,0,0) 100%) -8px 100%,
        linear-gradient(135deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0) 49.99%, rgba(255,255,255,1) 50%, rgba(255,255,255,1) 100%) 8px 100%;
    /* 8px = 16px / 2 */
    background-repeat: no-repeat;
}

Answer 3

我认为通过蒙版图像覆盖视频会更容易。像这样：

＆＃13;

img {
    width: 340px;
    height: 200px;
    position: absolute;
    z-index: 2;
    /*right: 28px;
	bottom: 77px;*/
}

.media-container {
    position: fixed;
    z-index: 1;
    right: 28px;
    bottom: 77px;
    width: 340px;
    height: 200px;
    overflow: hidden;
    text-align: center;
}

＆＃13;

<img src="http://www.joomlaworks.net/images/demos/galleries/abstract/7.jpg">
<div class="media-container">
    <iframe width="365" height="200" src="https://www.youtube.com/embed/JqjIb6FhU_k" frameborder="0" allowfullscreen wmode="Opaque"></iframe>
    <div>

＆＃13;

但是想象一下这张图片是专门绘制PNG的，以覆盖0不透明度的视频。

Answer 4

这样做：

<div class="fixed">
<div class="media-container">
        <iframe width="340" height="200" src="https://www.youtube.com/embed/JqjIb6FhU_k" frameborder="0" allowfullscreen></iframe>
    </div>
</div>

的CSS：

.fixed{
    position:fixed;
      right: 28px;
    bottom: 77px;
    width: 340px;
    height: 200px;
}
.media-container {
    position: relative;
    border-radius: 7px;
    text-align: center;
    background: #ddd;
    width:340px;
}

.media-container:after {
    top: 100%;
    left: 50%;
    border: solid transparent;
    content: " ";
    height: 0;
    width: 0;
    position: absolute;
    pointer-events: none;
    border-color: rgba(0, 0, 0, 0);
    border-top-color: #ddd;
    border-width: 30px;
    margin-left: -30px;
}

这是Fiddle。这个工具很方便，需要Look！

带有伪元素css

4 个答案: