Bootstrap3模态框Modal垂直居中样式

1，Bootstrap 模态框插件Bootbox垂直居中样式：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Bootstrap </title>
    <!--[if lt IE 9]>
    <script src="https://cdn.bootcss.com/html5shiv/3.7.3/html5shiv.js"></script>
    <script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.js"></script>
    <![endif]-->
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.css" rel="stylesheet">
    <script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.js"></script>
    <script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.js"></script>
    <script src="https://cdn.bootcss.com/bootbox.js/4.4.0/bootbox.js"></script>

    <style>
        /* 模态框居中样式 */
        .bootbox-container {
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            z-index: 1049;
            overflow-y: auto;
        }

        .bootbox-container:empty {
            position: static;
        }

        .modal {
            display: table;
            width: 600px;
            height: 100%;
            margin: 0 auto;
        }

        .modal-dialog {
            display: table-cell;
            vertical-align: middle;
        }
        /* //模态框居中样式 */
    </style>
    <script>
        $(function () {
            /*设置bootbox*/
            bootbox.setLocale("zh_CN");
            bootbox.setDefaults({container: '.bootbox-container'});

            /*使用bootbox*/
            bootbox.dialog({message: '<img src="https://www.cnblogs.com/images/logo_small.gif"/>'}).width(155);
        });
    </script>
</head>
<body>

<h1>Hello, world!</h1>

<!--bootbox容器-->
<div class="bootbox-container"></div>
</body>
</html>

2，Bootstrap模态框Modal垂直居中样式：

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Bootstrap </title>
    <!--[if lt IE 9]>
    <script src="https://cdn.bootcss.com/html5shiv/3.7.3/html5shiv.js"></script>
    <script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.js"></script>
    <![endif]-->
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.css" rel="stylesheet">
    <script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.js"></script>
    <script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.js"></script>
    <script src="https://cdn.bootcss.com/bootbox.js/4.4.0/bootbox.js"></script>

    <style>
        /* 模态框居中样式 */
        .modal {
            display: table;
            width: 600px;
            height: 100%;
            margin: 0 auto;
        }

        .modal-dialog {
            display: table-cell;
            vertical-align: middle;
        }

        /* //模态框居中样式 */
    </style>
</head>

<body>

    <h2>创建模态框（Modal）</h2>
    <!-- 按钮触发模态框 -->
    <button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">开始演示模态框</button>
    <!-- 模态框（Modal） -->
    <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header">
                    <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                    <h4 class="modal-title" id="myModalLabel">模态框（Modal）标题</h4>
                </div>
                <div class="modal-body">
                    <p>在这里添加一些文本</p>
                    <p>在这里添加一些文本</p>
                    <p>在这里添加一些文本</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">提交更改</button>
                </div>
            </div>
            <!-- /.modal-content -->
        </div>
        <!-- /.modal -->
    </div>

</body>

</html>