我想在图像上显示一个箭头。每次都应使该箭头居中。我该怎么做?
这是我在jsfiddle中的代码:
CSS:
.t1_img {
background-image:url('http://www.4freephotos.com/medium/batch/Branch-of-acacia-with-flowers777.jpg');
position: relative;
background-size: cover;
background-position: center center;
overflow: hidden;
border-radius: 10px 0 0 0;
height: 200px;
}
.t1_arrow {
position: absolute;
bottom: 0;
width: 60px;
border-left: 40px solid #cfcfcf;
border-right: 40px solid #cfcfcf;
border-top: 20px solid transparent;
}
.t1_content {
background-color: #cfcfcf;
height: 150px;
padding-top: 20px;
margin-bottom: 40px;
}
HTML:
<div class="container">
<div class="row">
<div class="col-md-3">
<div class="t1_img">
<div class="t1_arrow"></div>
</div>
<div class="t1_content">
Textinhalt
</div>
</div>
<div class="col-md-3">
<div class="t1_img">
<div class="t1_arrow"></div>
</div>
<div class="t1_content">
Textinhalt
</div>
</div>
<div class="col-md-3">
<div class="t1_img">
<div class="t1_arrow"></div>
</div>
<div class="t1_content">
Textinhalt
</div>
</div>
<div class="col-md-3">
<div class="t1_img">
<div class="t1_arrow"></div>
</div>
<div class="t1_content">
Textinhalt
</div>
</div>
</div>
</div>
你知道箭头的宽度,所以如果你把它放左:50%;和margin-left:-30px; 因为它的宽度是60px,所以每次都居中。所以加这个
.t1_arrow {left:50%;margin-left:-30px;}
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