在ios中SWreveal删除并添加后退按钮

Question

enter image description here我试过这样：

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button onclick="clickme()">click me</button>
<input list="countries" type = 'text' id='country'>
 <datalist id="countries">
    <option data-value='1' value='India'></option>
    <option data-value='2' value='USA'></option>
    <option data-value='3' value='UK'></option>
 </datalist>

谢谢..！