Antd Fixed Header In Layout

The demo in @benjycui's anwser is published at ant.design site now: https://ant.design/components/layout/#components-layout-demo-fixed

All you need is some CSS to achieve this

#header {
    position:fixed;
    width:100%;
    left:0;
    top:0;
    right: 0;
    z-index: 1000;
}