CODEWITHSUNDEEP
iphonehtmlxmlxpathhpple
libai
libai

Reputation: 195

How to get elements of html,xml by hpple ( xpath )?

please use hpple(xpath), This is a followup to my previous question: 

http://stackoverflow.com/questions/6723244/iphone-how-to-select-this-label

How can I get the number in seekVideo(number)? For example:

<a href="#" class="transcriptLink" onclick="seekVideo(2000); return false;"

I want to get "2000".

I have tried:

NSArray *elements = [xpathParser search:@"//div[@id='transcriptText']/div/p/number(substring-before(substring-after(@onclick, '('), ')'))"];

But that's not right. How should i do this?

If someone can you use the code framework named hpple(xpath) , it would be great.

this is my code for get text ,now how to change for getting number?????

  #define WebSite @"http://www.ted.com/talks/matt_cutts_try_something_new_for_30_days.html"

- (void)setLoadData
{
    NSData *siteData = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:WebSite]];



    TFHpple *xpathParser = [[TFHpple alloc] initWithHTMLData:siteData];
    NSArray *elements = [xpathParser search:@"//div[@id='transcriptText']/div/p/a[number(substring-before(substring-after(@onclick, '('), ')')) >2000]/text()"];

    NSMutableArray *arr = [[NSMutableArray alloc] init];

    for (TFHppleElement *element in elements) 
    {

        NSString *strs = [element content];
        NSLog(@"cc: %@", strs);
        [arr addObject:strs];
        NSLog(@"arr: %@", arr);

    }
    self.listData = arr;
    [arr release];
    [xpathParser release];
}

Upvotes: 0

Views: 1157

Answers (1)

Dimitre Novatchev
Dimitre Novatchev

Reputation: 243479

I have tried:

     NSArray *elements = [xpathParser
 search:@"//div[@id='transcriptText']/div/p/number(substring-before(substring-after(@onclick,
 '('), ')'))"];

But that's not right. How should i do ?

In XPath 1.0 it is syntactically illegal to have a function call as a location step.

Try:

substring-before(substring-after(.../a/@onclick, 'seekVideo('), 
                 ')'
                 )

Or try:

number(
       substring-before(substring-after(.../a/@onclick, 'seekVideo('), 
                        ')'
                        )
       )

where ... must be substituted with the XPath expression that selects the parent of a.

Upvotes: 1

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