bootstrap居中

1.页面

<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 col-centered">
                </div>
        </div>
</div>

2.css

.container {
    display: table;
    height: 100%;
}

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

.row-centered {
    text-align: center;
}

.col-centered {
    display: inline-block;
    float: none;
    text-align: left;
    margin-right: -4px;
}