UIwebview和js交互问题

试试：NSString *js = @"var element = document.getElementById('header'); element. parentNode. removeChild(element);";
NSString *res = [webview stringByEvaluatingJavaScriptFromString:js];

解决方案 »

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还是不行哦，还有没有其他的方法？
把你web的源码发上来
还是不行哦，还有没有其他的方法？
把你web的源码发上来
<!DOCTYPE html>




 <html lang="en" class="no-js">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>我的考勤情况</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="shortcut icon" href="/tms/assets//favicon.ico" type="image/x-icon">
<link rel="apple-touch-icon" href="/tms/assets//apple-touch-icon.png">
<link rel="apple-touch-icon" sizes="114x114" href="/tms/assets//apple-touch-icon-retina.png">
<link rel="stylesheet" href="/tms/assets/application-8b6ca475405ef1bc971055ff3be99861.css"/>
<script src="/tms/assets/application-26c38fa7c3e6771360c437e258af7623.js" type="text/javascript" ></script><meta name="layout" content="main"/><link rel="stylesheet" href="/tms/assets/rollcall-statis/student-435c897fb7fd8239044f2a7cbca04e06.css"/>
<script src="/tms/assets/rollcall-statis/student-5793c86d4507c66f53dfe5900c6a5d6f.js" type="text/javascript" ></script>

</head>
<body>
<div id="header" class="navbar navbar-inverse navbar-static-top">
<div class="container">
<div class="navbar-header">
<button class="navbar-toggle" type="button" data-toggle="collapse" data-target=".bs-navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
       </button>
       <a class="navbar-brand"><span id="logo" style="display:inline-block;width:30px"></span></a>
     </div>
<div class="collapse navbar-collapse bs-navbar-collapse">
<ul class="nav navbar-nav"><li><a href="/tms/">Home</a></li><li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Activity <b class="caret"></b></a><ul class="dropdown-menu"><li><a href="/tms/leaves/new">Create Leave</a></li><li><a href="/tms/cardReissueRequests/new">Reissue Student Card</a></li><li><a href="/tms/bookings/new">Classroom booking</a></li></ul></li><li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Query <b class="caret"></b></a><ul class="dropdown-menu"><li><a href="/tms/rollcall/personal">My Rollcall</a></li><li><a href="/tms/leaves">My Leaves</a></li><li><a href="/tms/schedule/student">My Schedule</a></li><li><a href="/tms/bookings">My Bookings</a></li><li><a href="/tms/placeUsage">menu.queryPlaceUsage</a></li><li><a href="/tms/addresses">AdminClass Address List</a></li></ul></li><li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Feedback <b class="caret"></b></a><ul class="dropdown-menu"><li><a href="/tms/issues/new">Create Issue</a></li><li><a href="/tms/issues">All Issues</a></li><li><a href="/tms/issues?personal">My Issues</a></li></ul></li></ul>
<ul class="nav navbar-nav navbar-right">
<li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">陈杰豪 <b class="caret"></b></a>
<ul class="dropdown-menu">
<li><a href="/tms/profile">修改个人信息</a></li>
<li class="divider"></li>
<li><a href="/tms/logout">退出</a></li>
</ul>
</li>
</ul>
</div>
</div>
</div>
<div class="container">

    <div id="rollcallStatis"></div>
    <script id="statis-template" type="text/x-dot-template">
<h4>考勤</h4>
<ul class='list-unstyled rollcall-items'>
{{? it.rollcallItems.length}}
{{~ it.rollcallItems :ri}}
<li>
<label class='label {{= ri.typeClass()}}'>{{= ri.typeText()}}</label>
<span {{? ri.type < 0}}style="text-decoration:line-through;"{{?}}>
{{=ri.weekText()}} 
{{=ri.arrangement.dayOfWeekText()}} 
{{=ri.arrangement.sectionsText()}} 
{{=ri.teacher}} 
{{=ri.arrangement.courseText()}}
</span>
</li>
{{~}}
{{?? true}}
<li>暂无考勤数据</li>
{{?}}
</ul>
<h4>请假</h4>
<ul class='list-unstyled leave-items'>
{{? it.leaveItems.length }}
{{~ it.leaveItems :li}}
<li>
<label class='label {{= li.typeClass()}}'>{{= li.typeText()}}</label>
<span>
{{=li.weekText()}} 
{{=li.dayOfWeekText()}} 
{{=li.sectionsText()}} 
{{=li.courseText()}} 
</span>
</li>
{{~}}
{{?? true}}
<li>暂无请假数据</li>
{{?}}
</ul>
<h4>课程</h4>
<ul class='list-unstyled course-items'>
{{? it.courses.length}}
{{~ it.courses :ci}}
<li>
<label class='label {{=(ci.statis / ci.hours >= 1 / 9) ? "label-danger": "label-default"}}'>
{{= ci.statis}}/{{= ci.hours}}
</label>
<span>{{= ci.course}}</span>
</li>
{{~}}
{{?? true}}
<li>暂无课程数据</li>
{{?}}
</ul>
</script></div>
<div id="footer">
<div class="container">
   <span class="pull-right"><a href="http://www.bnuz.edu.cn" target="_blank">北京师范大学珠海分校</a></span>
   <span><a href="/tms/about">关于我们</a> </span>
</div>
</div>
<script src="/tms/assets/logo-35ac5e4e90a099142f72c28dbf683d2e.js" type="text/javascript" ></script>
<script >
$(function(){
$("#rollcallStatis").rollcallStatisStudent({
rollcallItems: [{"week":11,"dayOfWeek":2,"courseClass":"管理信息系统","teacher":"赵丕显","totalSection":3,"type":2,"startSection":7},{"week":11,"dayOfWeek":3,"courseClass":"财务管理","teacher":"毕劲","totalSection":2,"type":2,"startSection":3}],
leaveItems:    [],
courses:       [{"course":"管理信息系统","hours":51.0,"statis":1.5},{"course":"财务管理","hours":34.0,"statis":1.0}]
});
});
</script>
</body>
</html>
我就是想把id为header的层删掉
那基本上可以确定是stringByEvaluatingJavaScriptFromString这个方法执行时机的问题了，你应该把它放在webViewDidFinishLoad回调里执行