关于移动端软键盘与输入框的遮挡问题

scrollIntoView(alignWithTop)  滚动浏览器窗口或容器元素,以便在当前视窗的可见范围看见当前元素。如果alignWithTop为true,或者省略它,窗口会尽可能滚动到自身顶部与元素顶部平齐。

<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
	<head>
		<title>TODO supply a title</title>
		<meta charset="UTF-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
	</head>
	<body>
		<a onClick="onc()">dasdasd</a>
		<div style="width:400px; height:400px; border: 1px solid #f00;"></div>
			<div id="nn" style="border:1px solid #666">
				<div style="height:900px;">sadasdasd</div>  
			</div>
	</body>
	<script type="text/javascript">
   //作为一个事件的函数来被调用
		function onc () {
		var dd = document.getElementById("nn").scrollIntoView(true);	
               //这个意思其实就是将这个元素到顶部来浏览器窗口的顶部来显示
	}
	</script>
</html>

这个id为nn的div就会到浏览器窗口的顶部显示;

至于false,你可以自行去尝试一下,效果也是很明显的,

=========================================

通过这个函数做的一个小实例,锁定网页的导航条,然后点击导航,调到指定的div,这个功能在一般的网页设计中是很常见的,看代码:

<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
	<head>
		<title>nav测试</title>
		<meta charset="UTF-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<style type="text/css">
			*{margin:0; padding:0}
			body{width:960px; height:2000px; margin:0 auto; border: 1px dotted #432432;}
			ul,li{list-style-type: none;}
			a{text-decoration: none;}
			.nav{border:1px solid #000; 
				 height:30px; 
				 z-index:9999; 
				position:fixed ; 
				top:0px;
				_position:absolute;
				_top:expression(documentElement.scrollTop + "px");
			}
			.nav ul li{
				float:left;
				font-size: 16px;
				line-height: 30px;
				padding:0px 63px;
			}
			.nav ul li:hover{
				background: #23ded3;
			}
			#main{
				height:1000px; 
				border:1px solid #f00;
				margin-top:30px;
			}
			#div1{
				height:400px;
				border: 1px solid #ccc;
			}
			 #div2{
				height:400px;
				border: 1px solid #ccc;
			}
			 #div3{
				height:400px;
				border: 1px solid #ccc;
			}
		</style>
	</head>
	<body>
		<div id="headr">
			<div class="nav">
				<ul>
					<li><a>首页</a></li>
					<li><a onclick="onc()">你好</a></li>
					<li><a>很好</a></li>
					<li><a>他好</a></li>
					<li><a>真的</a></li>
					<li><a>哦哦</a></li>
				</ul>
			</div>
		</div>
		<div id ="main" style="width:960px; height: auto;">
			<div id="div1">
				<p>我是div1的内容</p>
			</div>
			<div id="div2">
				<p>我是div2的内容</p>
			</div>
			<div id="div3">
				<p>我是div3的内容</p>
			</div>
		</div>
		<div id ="footr"></div>
	</body>
	<script type="text/javascript">
		var dHeight = document.documentElement.clientHeight;
		var div1 = document.getElementById("div1");
		var div2 = document.getElementById("div2");
		var div3 = document.getElementById("div3");
		div1.style.height = dHeight - 30 + "px";		
                //通过一个js动态的来确定每个div的高度,还可以通过循环来实现,这里就不加了,各位自己可尝试
		div2.style.height = dHeight -30 + "px";
		div3.style.height = dHeight -30 + "px";
			var li = document.getElementsByTagName("li");
			li[0].onclick = function(){
				div1.scrollIntoView(false);		 
                                //这里不能给true不然会将会与导航条重叠
			}
			li[1].onclick = function(){
				div2.scrollIntoView(false);
			}
			li[2].onclick = function(){
				div3.scrollIntoView(false);
			}
	</script>
</html>

测试微信浏览器输入框与软键盘交接demo

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name=viewport content="width=device-width, initial-scale=1">
	<title>qdabc.cn</title>
	<link rel="stylesheet" href="">
	<script src="https://cdn.bootcss.com/jquery/1.11.3/jquery.min.js"></script>
	<style>
		* {
			margin: 0;
			padding: 0;
			box-sizing: border-box;
		}

		body {
			position: relative;
			background: #ccc;
		}

		.sendMsg {
			width: 100%;
			height: 40px;
			padding: 0 15px;
			color: #000;
			outline: none;
			border: 1px solid #f60;
			position: absolute;
			bottom: 0;
			left: 0;
		}

	</style>
</head>
<body>
	<input class="sendMsg" type="text" placeholder="发送留言">

	<script type="text/javascript">
		var winHeight = $(window).height();
		$('body').css('height', winHeight);

		$('.sendMsg').click(function(e) {
			e.preventDefault();
			document.querySelector('.sendMsg').scrollIntoView(false);
		})
	</script>
</body>
</html>

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