解决ios底部固定输入框，获取焦点时弹出输入法键盘挡住输入框

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ios端比较常见的，就是在页面底部固定的输入框，如下，一旦获取焦点，弹出的输入法键盘就会把input输入框完全挡住，解决方法很简单，加上下面的几行代码即可

     

	      	$(".replay_text").on("click", function() {
		        setTimeout(function(){ 
		            document.body.scrollTop = document.body.scrollHeight; 
		        },300); 
		    })

完整dome：

<template>
	<div class="templ">
		<div>123</div><br />
		<div>123</div><br />
		<div>123</div><br />
		<div>123</div><br />
		<div>123</div><br />
		<br /><br /><br />
		<div>123</div><br />
		<div>123</div><br />
		<div>123</div><br />
		<div>123</div><br />
		<br /><br /><br />
		<div>123</div><br />
		<div>123</div><br />
		<div>123</div><br />
		<div>123</div><br />
	    
	    <div class="replyBox">
	      <div class="reply">
	        <textarea class="replay_text" rows="1" cols="10" maxlength="140" autofocus="autofocus" ref="content" :placeholder="placeText"/>
	        <button class="send">发送</button>
	      </div>
	    </div>
  	</div>
</template>

<script>
	export default {
	    data() {
	      return {

	      };
	    },
	    mounted() {
	      	$(".replay_text").on("click", function() {
		        setTimeout(function(){ 
		            document.body.scrollTop = document.body.scrollHeight; 
		        },300); 
		    })
	    }
	}
</script>

<style scoped lang="less">
.replyBox{
    width: 100%;
    height: 0.8rem;
    padding: 0.1rem 0.2rem;
    position: fixed;
    bottom: 0;
    background: #fff;
    font-size: 0.26rem;
    border-top: 0.01rem solid #f2f2f2;
    z-index: 1;
    .reply{
	    height: 100%;
	    display: flex;
	    justify-content: space-between;
	    textarea{
		    height: 100%;
		    outline: none;
		    background: #f2f2f2;
		    padding: 0.1rem 0.1rem;
		    border: none;
		    resize: none;
		    caret-color: #fc9729;
	    }
	    .send{
		    display: inline-block;
		    padding: 0.1rem 0.1rem;
		    width: 18%;
		    border-radius: 0.06rem;
		    color: #fff;
		    font-size: 0.28rem;
		    background: #ffb955;
		    text-align: center;
		    margin-left: 0.2rem;
	    }
    }
}
</style>