html 头部添加
<meta name="viewport" content="width=device-width, initial-scale=1.0,minimum-scale=1.0, maximum-scale=1.0, viewport-fit=cover">
css添加：
padding-bottom: 0px;
padding-bottom: constant(safe-area-inset-bottom);
padding-bottom: env(safe-area-inset-bottom);
结束