问题
how can i get specific elements from html page if i have this nsstring with this value
<body style="background-color: 3399CC;font-size: 200.5%;font-family:monospace;font-style:oblique;">
<div id="1" align="center" style="padding-top: 10%;" >
<h1 style="color: #FFFFFF">fawazapp</h1>
<p style="color: #C0C0C0;"> bbb</p>
<p style="color: #FFFFFF;">aaaaaaaaa</p>
</div>
<div id="2" align="center" style="padding-top: 10%;" >
<h1 style="color: #FFFFFF">fawazapp</h1>
<p style="color: #C0C0C0;"> bbb</p>
<p style="color: #FFFFFF;">aaaaaaaaa</p>
</div>
I want to clear everything except div with id number 2 to be like this
</div>
<div id="2" align="center" style="padding-top: 10%;" >
<h1 style="color: #FFFFFF">fawazapp</h1>
<p style="color: #C0C0C0;"> bbb</p>
<p style="color: #FFFFFF;">aaaaaaaaa</p>
</div>
回答1:
UIWebView has a method stringByEvaluatingJavaScriptFromString: so if you have (or create) some javascript to navigate / manipulate / interrogate the page contents you can run it to obtain the result.
来源：https://stackoverflow.com/questions/17522181/get-specific-elements-from-html-in-uiwebview