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Bootstrap進(jìn)度條組件知識詳解

 更新時間:2016年05月01日 12:09:30   作者:洛水三千  
在網(wǎng)頁中,經(jīng)常見到進(jìn)度條效果,那么這些個性的進(jìn)度條組件效果是怎么實(shí)現(xiàn)的呢,下面腳本之家小編給大家分享Bootstrap進(jìn)度條組件知識詳解,感興趣的朋友要求學(xué)習(xí)吧

在網(wǎng)頁中,經(jīng)常見到進(jìn)度條效果,如:平分系統(tǒng)、加載狀態(tài)等,進(jìn)度條組件使用了css3的transition和animation屬性來完成一些特效,這些特效在IE9及IE9以下版本、Firefox的老版本中并不支持,Opera 12 不支持 animation 屬性。

進(jìn)度條和其他獨(dú)立組件一樣,開發(fā)者可以根據(jù)自己的需要選擇對應(yīng)的版本:

LESS: progress-bars.less

SASS: _progress-bars.scss

基礎(chǔ)進(jìn)度條

實(shí)現(xiàn)原理:

需要兩個容器,外容器使用類名.progress,子容器使用類名.progress-bar;其中.progress用來設(shè)置進(jìn)度條容器的背景色,容器的高度,間距等;而.progress-bar設(shè)置進(jìn)度方向,進(jìn)度條的背景色和過度效果;下面是css源碼:

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;
transition: width .6s ease;
}

例子:

<div class="progress">
<div class="progress-bar" style="width:30%;" role="progressbar" aria-valuenow="30" aria-valuemin="0" aria-valuemax="100">
<span class="sr-only">30%</span>
</div>
</div>

role屬性作用:告訴搜索引擎這個div的作用是進(jìn)度條;

aria-valuenow=”30”屬性作用:當(dāng)前進(jìn)度條的進(jìn)度為40%;

aria-valuemin=”0”屬性作用:進(jìn)度條的最小值為0%;

aria-valuemax=”100”屬性作用:進(jìn)度條的最大值為100%;

可以將設(shè)置了.sr-only類的<span>標(biāo)簽從進(jìn)度條組件中移除,而讓當(dāng)前進(jìn)度顯示出來;

<div class="progress">
<div class="progress-bar" style="width:40%;" role="progressbar" aria-valuenow="40" aria-valuemin="0" aria-valuemax="100" >40%</div>
</div>

彩色進(jìn)度條

彩色進(jìn)度條和警告進(jìn)度條一樣,為了能給用戶一個更好的體驗,也根據(jù)不同的狀態(tài)配置了不同的進(jìn)度條顏色,主要包括以下四種:

progress-bar-info:表示信息進(jìn)度條,藍(lán)色

progress-bar-success:表示成功進(jìn)度條,綠色

progress-bar-warning:表示警告進(jìn)度條,黃色

progress-bar-danger:表示錯誤進(jìn)度條,紅色

css源碼:

.progress-bar-success {
background-color: #5cb85c;
}
.progress-bar-info {
background-color: #5bc0de;
}
.progress-bar-warning {
background-color: #f0ad4e;
}
.progress-bar-danger {
background-color: #d9534f;
}

使用方法:

只需要在基礎(chǔ)進(jìn)度條上增加對應(yīng)的類名即可

例子:

<h1>彩色進(jìn)度條</h1>
<div class="progress">
<div class="progress-bar progress-bar-success" style="width:25%;" role="progressbar" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100">25%</div>
</div>
<div class="progress">
<div class="progress-bar progress-bar-info" style="width:40%;" role="progressbar" aria-valuenow="40" aria-valuemax="100" aria-valuemin="0">40%</div>
</div>
<div class="progress">
<div class="progress-bar progress-bar-warning" style="width:80%;" role="progressbar" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100">80%</div>
</div>
<div class="progress">
<div class="progress-bar progress-bar-danger" style="width:60%;" role="progressbar" aria-valuenow="40" aria-valuemax="100" aria-valuemin="0">60%</div>
</div>

效果如下:

條紋進(jìn)度條

條紋進(jìn)度條采用css3的線性漸變來實(shí)現(xiàn),并未借助任何圖片,使用條紋進(jìn)度條只需在進(jìn)度條的容器.progress基礎(chǔ)上追加類名”progress-striped”,如果要進(jìn)度條紋像彩色進(jìn)度一樣,具有彩色效果,只需在進(jìn)度條上增加相應(yīng)得顏色類名

下面是.progress-striped樣式源碼:

.progress-striped .progress-bar {
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: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-size: 40px 40px;
}

條紋進(jìn)度對應(yīng)的每種狀態(tài)也有不同的顏色

.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: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: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: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: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);
}

下面來看看條紋進(jìn)度條的運(yùn)用:

<h1>條紋進(jìn)度條</h1>
<div class="progress progress-striped">
<div class="progress-bar progress-bar-success" style="width:25%;" role="progressbar" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100">25%</div>
</div>
<div class="progress progress-striped">
<div class="progress-bar progress-bar-info" style="width:40%;" role="progressbar" aria-valuenow="40" aria-valuemax="100" aria-valuemin="0">40%</div>
</div>
<div class="progress progress-striped">
<div class="progress-bar progress-bar-warning" style="width:80%;" role="progressbar" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100">80%</div>
</div>
<div class="progress progress-striped">
<div class="progress-bar progress-bar-danger" style="width:60%;" role="progressbar" aria-valuenow="40" aria-valuemax="100" aria-valuemin="0">60%</div>
</div>


動態(tài)條紋進(jìn)度條

在進(jìn)度條.progress 、.progress-striped兩個類的基礎(chǔ)上在加入類名.active就能實(shí)現(xiàn)動態(tài)條紋進(jìn)度條。

其實(shí)現(xiàn)原理主要是通過css3的animation來完成。首先通過@keyframes創(chuàng)建了一個progress-bar-stripes的動畫,這個動畫主要做了一件事,就是改變背景圖像的位置,也就是 background-position的值。因為條紋進(jìn)度條是通過CSS3的線性漸變來制作的,而linear-gradient實(shí)現(xiàn)的正是對應(yīng)背景中的背景圖片

下面是css源碼:

@-webkit-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;
}
}

@keyframes僅僅是創(chuàng)建了一個動畫效果,如果要讓進(jìn)度條真正的動起來,我們需要通過一定的方式調(diào)用@keyframes創(chuàng)建的動畫 “progress-bar-stripes”,并且通過一個事件觸發(fā)動畫生效。在Bootstrap框架中,通過給進(jìn)度條容器“progress”添加一個類名“active”,并讓文檔加載完成就觸“progress-bar-stripes”動畫生效

調(diào)用動畫對應(yīng)的樣式代碼如下:

.progress.active .progress-bar {
-webkit-animation: progress-bar-stripes 2s linear infinite;
animation: progress-bar-stripes 2s linear infinite;
}

例子:

<h1>動態(tài)條紋進(jìn)度條</h1>
<div class="progress progress-striped active">
<div class="progress-bar progress-bar-success" style="width:25%;" role="progressbar" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100">25%</div>
</div>
<div class="progress progress-striped active">
<div class="progress-bar progress-bar-info" style="width:40%;" role="progressbar" aria-valuenow="40" aria-valuemax="100" aria-valuemin="0">40%</div>
</div>
<div class="progress progress-striped active">
<div class="progress-bar progress-bar-warning" style="width:80%;" role="progressbar" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100">80%</div>
</div>
<div class="progress progress-striped active">
<div class="progress-bar progress-bar-danger" style="width:60%;" role="progressbar" aria-valuenow="40" aria-valuemax="100" aria-valuemin="0">60%</div>
</div>


效果如下(由于是直接從網(wǎng)頁上結(jié)果來的圖,這里并看不到它的動態(tài)效果):


層疊進(jìn)度條:

層疊進(jìn)度可以將不容狀態(tài)的進(jìn)度條放在一起,按水平方式排列

例子:

<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>

除了層疊彩色進(jìn)度條之外,還可以層疊條紋進(jìn)度條,或者說條紋進(jìn)度條和彩色進(jìn)度條混合層疊,僅需要在“progress”容器中添加對應(yīng)的進(jìn)度條,同樣要注意,層疊的進(jìn)度條之和不能大于100%。

下面來看一個例子:

<div class="progress">
<div class="progress-bar progress-bar-success" style="width:20%"></div>
<div class="progress-bar progress-bar-info" style="width:20%"></div>
<div class="progress-bar progress-bar-warning" style="width:30%"></div>
<div class="progress-bar progress-bar-danger" style="width:15%"></div>
</div>
<div class="progress">
<div class="progress-bar progress-bar-success progress-bar-striped" style="width:20%"></div>
<div class="progress-bar progress-bar-info progress-bar-striped" style="width:20%"></div>
<div class="progress-bar progress-bar-striped progress-bar-warning" style="width:30%"></div>
<div class="progress-bar progress-bar-danger progress-bar-striped" style="width:15%"></div>
</div>
<div class="progress">
<div class="progress-bar progress-bar-success" style="width:20%"></div>
<div class="progress-bar progress-bar-info progress-bar-striped" style="width:20%"></div>
<div class="progress-bar progress-bar-warning" style="width:30%"></div>
<div class="progress-bar progress-bar-danger progress-bar-striped" style="width:15%"></div>
</div>

關(guān)于Bootstrap進(jìn)度條組件知識詳解到此就介紹了,希望對大家有所幫助!

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