ios h5 获取焦点时页面放大

通过添加meta标签来控制页面缩放

<meta name="apple-mobile-web-app-capable" content="yes" />
<meta
  name="viewport"
  content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
/>