在iphone中parsingHTMLurl

我如何parsing一个html文件？

我需要span标记之间的数据。

<div id=currency_converter_result>1 AED = <span class=bld>0.4765 ANG</span> 

Answer 1

如果你只需要标签“span”，你可以使用NSRegularExpression，比如这个

 NSString *html = @"<div id=currency_converter_result>1 AED = <span class=bld>0.4765 ANG</span>"; NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"<span[^>]*>(.+?)</span>" options:NSRegularExpressionCaseInsensitive error:nil]; NSTextCheckingResult *textCheckingResult = [regex firstMatchInString:html options:0 range:NSMakeRange(0, html.length)]; NSLog(@"found: '%@'", [html substringWithRange:[textCheckingResult rangeAtIndex:1]]); 

或者，我更喜欢从xml或html数据创buildNSDictionary并使用它。 你可以用XML-to-NSDictionary库来做到这一点。

Answer 2

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

基本用法：

 NSError *error = nil; NSString *htmlString = @"<div id=currency_converter_result>1 AED = <span class=bld>0.4765 ANG</span>"; HTMLParser *p = [[HTMLParser alloc] initWithString:htmlString error:&error]; if (error) { NSLog(@"Error: %@", error); return; } HTMLNode *bodyNode = [p body]; NSArray *spanNodes = [bodyNode findChildTags:@"span"]; for (HTMLNode *spanNode in spanNodes) { if ([[spanNode getAttributeNamed:@"class"] isEqualToString:@"bld"]) { NSLog(@"%@", [spanNode rawContents]); //Answer to second question } } 

Answer 3

由于XHTML是XML，所以可以考虑使用NSXMLParser：

 @interface HTMLParser: NSObject <NSXMLParserDelegate> // or whichever superclass you have { // own declarations NSMutableString *str; NSXMLParser *parser; } // somewhere in a method of self, for example, init, or something named -(void) parseHtml - (void) parseHtml { parser = [[NSXMLParser alloc] initWithData:[@"<div id=currency_converter_result>1 AED = <span class=bld>0.4765 ANG</span>" dataUsingEncoding:NSUTF8StringEncoding]]; // of course you can substitute any string you want here, for example, the result of [NSString stringWithContentsOfFile:@"inex.html"] or whatever you need. parser.delegate = self; [parser parse]; [parser release]; } - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict { if ([elementName isEqualToString:@"span"] && [[attributeDict objectForKey:@"class"] isEqualToString:@"bld"]) { str = [NSMutableString string]; } } - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { [str appendString:string]; } - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { if ([elementName isEqualToString:@"span"]) { // now str contains the value you want! DoSomethingWith(str); } } 

希望这可以帮助。