bootstrap怎么使图片垂直居中？

Question

bootstrap怎么使图片垂直居中？

<div class="mbrand">
                    <a href="#"><img src="img/mbarnd1.gif" class="img-responsive center-block"/></a>
                    <a href="#"><img src="img/mbarnd2.gif" class="img-responsive center-block"/></a>
                    <a href="#"><img src="img/mbarnd3.gif" class="img-responsive center-block"/></a>
                    <a href="#"><img src="img/mbarnd4.gif" class="img-responsive center-block"/></a>
                    <a href="#"><img src="img/mbarnd5.gif" class="img-responsive center-block"/></a>
                </div>

Answer 1

把图片添加css类img-responsive center-block