模态弹出框--结构分析，玩转Bootstrap（基础）教程-慕课网

index.html bootstrap.css

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>结构分析</title>
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
</head>
<body>
<div class="modal show">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>
                <h4 class="modal-title">模态弹出窗标题</h4>
            </div>
            <div class="modal-body">
                <p>模态弹出窗主体内容</p>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">关闭</button>
                <button type="button" class="btn btn-primary">保存</button>
            </div>
        </div><!-- /.modal-content -->
    </div><!-- /.modal-dialog -->
</div><!-- /.modal -->
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script> 
</body>
</html>

/*模态弹出窗是固定在浏览器中的: */
/*bootstrap.css文件第5379行～第5389行*/
.modal {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1050;
  display: none;
  overflow: hidden;
  -webkit-overflow-scrolling: touch;
  outline: 0;
}
 
/*给.modal增加类名fade添加了一个过渡动画效果：*/
/*bootstrap.css文件第5390行～第5402行*/
.modal.fade .modal-dialog {
  -webkit-transition: -webkit-transform .3s ease-out;
       -o-transition:      -o-transform .3s ease-out;
          transition:         transform .3s ease-out;
  -webkit-transform: translate3d(0, -25%, 0);
       -o-transform: translate3d(0, -25%, 0);
          transform: translate3d(0, -25%, 0);
}
.modal.in .modal-dialog {
  -webkit-transform: translate3d(0, 0, 0);
       -o-transform: translate3d(0, 0, 0);
          transform: translate3d(0, 0, 0);
}
 
/*在全屏状态下，模态弹出窗宽度是自适应的，而且modal-dialog水平居中:*/
/*bootstrap.css文件第5407行～第5411行*/
.modal-dialog {
  position: relative;
  width: auto;
  margin: 10px;
}
 
/*浏览器视窗大于768px时，模态弹出窗的宽度为600px:*/
/*bootstrap.css文件第5479行～第5491行*/
@media (min-width: 768px) {
  .modal-dialog {
    width: 600px;
    margin: 30px auto;
  }
  .modal-content {
    -webkit-box-shadow: 0 5px 15px rgba(0, 0, 0, .5);
            box-shadow: 0 5px 15px rgba(0, 0, 0, .5);
  }
  .modal-sm {
    width: 300px;
  }
}
 
/*对于一个模态弹出窗而言，modal-content才是样式的关键:*/
/*bootstrap.css文件第5412行～第5423行*/
.modal-content {
  position: relative;
  background-color: #fff;
  -webkit-background-clip: padding-box;
         background-clip: padding-box;
  border: 1px solid #999;
  border: 1px solid rgba(0, 0, 0, .2);
  border-radius: 6px;
  outline: 0;
  -webkit-box-shadow: 0 3px 9px rgba(0, 0, 0, .5);
          box-shadow: 0 3px 9px rgba(0, 0, 0, .5);
}
 
/*modal-content还包括了modal-header、modal-body和modal-footer三个部分：*/
/*bootstrap.css文件第5441行～第5461行*/
.modal-header {
  min-height: 16.42857143px;
  padding: 15px;
  border-bottom: 1px solid #e5e5e5;
}
.modal-header .close {
  margin-top: -2px;
}
.modal-title {
  margin: 0;
  line-height: 1.42857143;
}
.modal-body {
  position: relative;
  padding: 15px;
}
.modal-footer {
  padding: 15px;
  text-align: right;
  border-top: 1px solid #e5e5e5;
}
 
/*modal-footer都是用来放置按钮，现在底部还对包含的按钮做一定的样式处理：*/
/*bootstrap.css文件第5462行～第5471行*/
.modal-footer .btn + .btn {
  margin-bottom: 0;
  margin-left: 5px;
}
.modal-footer .btn-group .btn + .btn {
  margin-left: -1px;
}
.modal-footer .btn-block + .btn-block {
  margin-left: 0;
}
 
/*蒙层样式“modal-backdrop”，他默认情况下是全屏黑色的:*/
/*bootstrap.css文件第5424行～第5432行*/
.modal-backdrop {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1040;
  background-color: #000;
}
 
/*添加了一个过渡动画，从fade到in，把opacity值从0变成了0.5:*/
/*bootstrap.css文件第5433行～第5440行*/
.modal-backdrop.fade {
  filter: alpha(opacity=0);
  opacity: 0;
}
.modal-backdrop.in {
  filter: alpha(opacity=50);
  opacity: .5;
}
 
/*媒体查询：*/
@media (min-width: 768px) {
  .modal-sm {
    width: 300px;
  }
}
@media (min-width: 992px) {
  .modal-lg {
    width: 900px;
  }
}

模态弹出框--结构分析

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