[英]Parsing Html url in iphone
如何解析HTML文件?
我需要在span標簽之間的數據。
<div id=currency_converter_result>1 AED = <span class=bld>0.4765 ANG</span>
如果只需要標記“ span”,則可以使用NSRegularExpression這樣的
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,我更喜歡從xml或html數據創建一個NSDictionary並使用它。 您可以使用XML到NSDictionary庫來實現。
由於XHTML是XML,因此可以考慮使用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);
}
}
希望這可以幫助。
看看這個: 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
}
}
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