How to get html-elements from html string?

Question

I need to get an image and its title from html string. I heard, javascript may get elements via tags or ids, but I've never used javascript earlier. So I found a nice framework - JavaScriptCore and here's my code snippet:

JSContext* context = [[JSContext alloc] initWithVirtualMachine:[JSVirtualMachine new]];
NSString* jsString = [NSString stringWithFormat:@"var parser = new DOMParser();"
                          "var doc = parser.parseFromString(%@, \"text/html\");"
                          "var imgs = document.getElementsByTagName('img');", [htmlString stringByReplacingOccurrencesOfString:@"\n" withString:@""]];
[context evaluateScript:jsString];

But context[@"parser"], context[@"doc"] and context[@"imgs"] return undefined. What do I make wrong? Maybe I will be better to use some other approach without JavaScriptCore?

Ivan Fateev · Accepted Answer · 2014-06-09 10:16:10Z

1

You can use some third party library that supports XPath queries. IMHO that would be a better way to work with DOM.

Here's a link with example http://www.raywenderlich.com/14172/how-to-parse-html-on-ios

edited Jun 9, 2014 at 10:16

answered Jun 9, 2014 at 9:32

Ivan Fateev

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3 Comments

Valentin Shamardin Over a year ago

Your link use NSXMLDocument which is only of OS X

Ivan Fateev Over a year ago

@ValentinShamardin I'm sorry, my bad. I've misread the question. Updated an answer. Thank you for pointing it out

Valentin Shamardin Over a year ago

Yes, I saw this link, thank you. Thank you for your time, I vote up.

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