问题
Is there a way to focus on the field, but without this jarring animation? The behavior is especially bad when the keyboard is visible.
Demo
http://plnkr.co/edit/9OydOFO0KUeKuaH8u70A?p=info
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="style.css">
<script src="script.js"></script>
</head>
<body>
<form>
<input>
<input>
<input>
<input>
<input>
...
<input>
</form>
</body>
</html>

回答1:
After some more research, this appears to be related to a focus jumping bugs in iOS. (https://remysharp.com/2012/05/24/issues-with-position-fixed-scrolling-on-ios#focus-jumping)
One neat trick that fixed it some instances was to set float: left; clear: left;
on the input field (Jumping input fields in Safari)
But that fix doesn't work if it needs to interact with a position: fixed
element. The jumping bug persists.
来源:https://stackoverflow.com/questions/31126330/tabbing-through-input-fields-in-mobile-safari-makes-browser-jump