给body加的css
padding-top: constant(safe-area-inset-top);
padding-left: constant(safe-area-inset-left);
padding-right: constant(safe-area-inset-right);
padding-bottom: constant(safe-area-inset-bottom);
<meta name="viewport" content="initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, width=device-width, viewport-fit=cover">
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, initial-scale=1, maximum-scale=1, viewport-fit=cover"/>