只从< div>获取文字和图片在目标C中 [英] Get only text and images from <div> in Objective C

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本文介绍了只从< div>获取文字和图片在目标C中的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在制作新闻阅读应用程序。我发现的最佳网站是 http://fulltextrssfeed.com/
它将文本和图像从任何网页,并返回干净的文本。由于他们没有API,我需要一些方法从< div> 获取数据。
这是div ID:

 < div id =preview> 

如何将 浸到Feed中并获取其内容如果没有HTML标签,那么这将是一个加号,如果有我可以做一个工作。)

不确定你的问题,但如果你使用obj-c,我真的推荐 Hpple 。这是一个很好的XML / HTML解析器。



要使用它,您需要添加 $ {SDKROOT} / usr / include / libxml2在你的项目选项中的

中添加,并将 -lxml2 添加到Other Linker Flag中。


$ b 然后,当你已经有Hpple文件时,将它拖到你的代码中: TFHpple.h TFHpple.m TFHppleElement.h TFHppleElement.m XPathQuery.h XPathQuery.m



代码(为了让你的div预览),添加:

  NSData * htmlData = [[NSString stringWithContentsOfURL:[NSURL URLWithString: @http://www.yoursite.com/index.html]] dataUsingEncoding:NSUTF8StringEncoding]; 

TFHpple * xpathParser = [[TFHpple alloc] initWithHTMLData:htmlData];
NSArray * elements = [xpathParser searchWithXPathQuery:@// div [@ id ='preview']]; //这里我们使用
TFHppleElement * element = [elements objectAtIndex:0];
NSString * string = [元素内容];
NSLog(@%@,string);

[xpathParser release];
[htmlData发布];

现在我们有了Hpple的预览div。要获得一些子类(如 p a ),请使用它:

  NSArray * elements = [xpathParser searchWithXPathQuery:@// div [@ id ='preview'] / p / text()]; 

为了深入了解,请看一看 XPath语法。另请参阅教程



希望它有帮助。


I'm making a news reading application. The best site I found was http://fulltextrssfeed.com/ It takes the text and images from any webpage and gives back clean text. As they don't have an API I need some way to get the data from the <div>. This is the div ID:

<div id="preview">

How can I leach onto the feed and get only its content (It would be a plus if there are no HTML tags, if there is I can make a work around.)

解决方案

I'm not sure about your question, but if you're using obj-c, I really recommend Hpple. It's a really good XML/HTML parser.

To use it, you'll need to add ${SDKROOT}/usr/include/libxml2 in "Header Search Path", in your project option and add -lxml2 to "Other Linker Flag".

Then, when you already have the Hpple files, drag it to your code: TFHpple.h, TFHpple.m, TFHppleElement.h, TFHppleElement.m, XPathQuery.h, XPathQuery.m.

In the code (To get your div "preview"), add:

NSData *htmlData = [[NSString stringWithContentsOfURL:[NSURL URLWithString: @"http://www.yoursite.com/index.html"]] dataUsingEncoding:NSUTF8StringEncoding];

TFHpple *xpathParser = [[TFHpple alloc] initWithHTMLData:htmlData];
NSArray *elements  = [xpathParser searchWithXPathQuery:@"//div[@id='preview']"]; // Here we use 
TFHppleElement *element = [elements objectAtIndex:0];
NSString *string = [element content];
NSLog(@"%@", string);

[xpathParser release];
[htmlData release];

Now we have the "preview div" with Hpple. To get some subclass (as p or a), use it:

NSArray *elements  = [xpathParser searchWithXPathQuery:@"//div[@id='preview']/p/text()"]; 

To undertand more, take a look at XPath Syntax. Also check a tutorial.

Hope it help.

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