基本样式
要实现进度条效果要使用两个容器,外容器使用“progress”样式,子容器使用“progress-bar”样式。例如:
<div class="progress"> <div class="progress-bar" style="width:40%"></div> </div>
progress样式主要设置进度条容器的背景色,容器高度、间距等,progress-bar样式设置进度,主要是设置了进度条的背景颜色和过渡效果。实现源码如下:
.progress { height: 20px; margin-bottom: 20px; overflow: hidden; background-color: #f5f5f5; border-radius: 4px; -webkit-box-shadow: inset 0 1px 2px rgba(0, 0, 0, .1); box-shadow: inset 0 1px 2px rgba(0, 0, 0, .1); } .progress-bar { float: left; width: 0; height: 100%; font-size: 12px; line-height: 20px; color: #fff; text-align: center; background-color: #428bca; -webkit-box-shadow: inset 0 -1px 0 rgba(0, 0, 0, .15); box-shadow: inset 0 -1px 0 rgba(0, 0, 0, .15); -webkit-transition: width .6s ease; -o-transition: width .6s ease; transition: width .6s ease; }
彩色进度条
在基础的进度条上追加对应的类名即可:
.progress-bar-info:信息进度条,进度条颜色为蓝色
.progress-bar-success:成功进度条,进度条颜色为绿色
.progress-bar-warning:警告进度条,进度条颜色为黄色
.progress-bar-danger:错误进度条,进度条颜色为红色
实现源码如下:
.progress-bar-success { background-color: #5cb85c; } .progress-bar-info { background-color: #5bc0de; } .progress-bar-warning { background-color: #f0ad4e; } .progress-bar-danger { background-color: #d9534f; }
条纹进度条
要实现条纹进度条效果只需要在进度条的容器“progress”基础上增加类名“progress-striped”即可。
实现源码如下:
.progress-striped .progress-bar, .progress-bar-striped { background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); -webkit-background-size: 40px 40px; background-size: 40px 40px; } .progress-striped .progress-bar-success { background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); } .progress-striped .progress-bar-info { background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); } .progress-striped .progress-bar-warning { background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); } .progress-striped .progress-bar-danger { background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); }
动态条纹进度条
在进度条“progress progress-striped”两个类的基础上再加入“active”类名即可。例如:
<div class="progress progress-striped active"> <div class="progress-bar progress-bar-success" style="width:40%"></div> </div>
实现原理主要通过CSS3的animation来完成。首先通过@keyframes创建了一个progress-bar-stripes的动画,这个动画主要做了一件事,就是改变背景图像的位置,也就是background-position的值。因为条纹进度条是通过CSS3的线性渐变来制作的,而linear-gradient实现的正是对应背景中的背景图片。动画的实现源码如下:
@-webkit-keyframes progress-bar-stripes { from { background-position: 40px 0; } to { background-position: 0 0; } } @-o-keyframes progress-bar-stripes { from { background-position: 40px 0; } to { background-position: 0 0; } } @keyframes progress-bar-stripes { from { background-position: 40px 0; } to { background-position: 0 0; } }
调用动画的实现源码如下:
.progress.active .progress-bar, .progress-bar.active { -webkit-animation: progress-bar-stripes 2s linear infinite; -o-animation: progress-bar-stripes 2s linear infinite; animation: progress-bar-stripes 2s linear infinite; }
层叠进度条
层叠进度条可以将不同状态的进度条放置在一起,按水平方式排列。例如:
<div class="progress"> <div class="progress-bar progress-bar-success" style="width:20%"></div> <div class="progress-bar progress-bar-info" style="width:10%"></div> <div class="progress-bar progress-bar-warning" style="width:30%"></div> <div class="progress-bar progress-bar-danger" style="width:15%"></div> </div>
我们可以发现,层叠进度条并没有额外的样式代码,之所以这样就能生效是因为在“progress-bar”上有一个左浮动的样式。要注意,层叠进度条宽度之和不能大于100%。
带Label的进度条
要实现带Label的进度条,只需要在进度条中添加你需要的值即可。例如:
<div class="progress"> <div class="progress-bar progress-bar-success" style="width:20%">20%</div> </div>
要是那进度条的值为0%时,可以这么写:
<div class="progress"> <div class="progress-bar" role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100">0%</div> </div>
以上所述是小编给大家介绍的 Bootstrap源码学习笔记之bootstrap进度条,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对三水点靠木网站的支持!
Bootstrap源码学习笔记之bootstrap进度条
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