Failed with selector "h1:first" on webpage http://en.m.wikipedia.org/wiki/Katy_Perry

[jnixdev]

Getting following error/exception:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Attempted to use selector with error: Error Domain=HTMLSelectorErrorDomain Code=1 "Unrecognized pseudo class" UserInfo=0x7fd24389f2d0 {NSLocalizedFailureReason=Error near character 8: Unrecognized pseudo class

h1:first
^        , HTMLSelectorInputString=h1:first, HTMLSelectorLocation=8, NSLocalizedDescription=Unrecognized pseudo class}'

At below line number two
#1 HTMLDocument *document = [HTMLDocument documentWithString:markup];
#2 HTMLElement * element = [document firstNodeMatchingSelector:@"h1:first"];

[nolanw]

That error is trying to tell you that :first isn't a thing in CSS selectors.

Which element are you trying to get to on that page? If it's just the first <h1> anywhere in the page, you can simply do [document firstNodeMatchingSelector:@"h1"].

[jnixdev]

Thanks, You are correct.

[nolanw]

Did you manage to get the elements you needed from the page?

[jnixdev]

Yes, thanks a lot.
I was considering it will fork for CSS Pseudo-classes as well. (ref:http://www.w3schools.com/css/css_pseudo_classes.asp),
I really appreciate your work, really great library.

[nolanw]

Most of those should work. The ones that won't work are the ones that don't make much sense for HTMLReader, like :visited (because HTMLReader doesn't know what you've visited).