Help in retrieving the attributes of a node

[poojagaonkar]

Hello,

First of all, a very nice library you have created here. I am using it for a feature in my app where I need to load a HTML string , select node with particular tags and fetch the attributes of name and value from those tags. I have reached this far :

HTMLParser *parser = [[HTMLParser alloc]initWithString : htmlString];
HTMLElement *htmlElement = [[HTMLElement alloc] initWithTagName:@"//input[@type = 'hidden']"];
NSArray *nodes = [parser parseFragmentWithContextElement : htmlElement];

for(HTMLNode *node in nodes)
{
   // Here I want to have the attributes of the node 
  // e.g. something like node.Attributes["name"].Value and  node.Attributes["value"].Value

}

It would be great if you could help me out and guide me in the right direction as I am quite new to iOS. Thank you.

[iabudiab]

@poojagaonkar Hey, I see that you've closed the issue already. Do you still need help with your problem? Will be glad to help 😉

[poojagaonkar]

Hey,

Thanks for replying. I couldn't solve the issue, but could continue without using the feature for the time being.

It would be nice if you could still help me solve it if I need to implement it in future.

Thanks again :)

Pooja

On Feb 11, 2017 5:20 PM, "Iskandar Abudiab" notifications@github.com wrote:

@poojagaonkar https://github.com/poojagaonkar Hey, I see that you've closed the issue already. Do you still need help with your problem? Will be glad to help 😉

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/iabudiab/HTMLKit/issues/3#issuecomment-279139090, or mute the thread https://github.com/notifications/unsubscribe-auth/AHfiLJDBJgl_tYuX3m61f8jRtEdV0071ks5rbaBpgaJpZM4L-DeY .

[iabudiab]

Hey, no problem. First things first, I'm not really sure what you are trying to accomplish and why you are using the fragment parsing, so here is my interpretation:

// First you parse the htmlString into a document
HTMLDocument *doc = [HTMLDocument documentWithString:htmlString];
// Then you qeury the document for all input elements that are hidden
NSArray *hiddenInputs = [doc querySelectorAll:@"input[type=hidden]"];

// Now you iterate the elements array
for (HTMLElement *element in hiddenInputs) {
    NSLog(@"%@: %@", element.attributes[@"name"], element.attributes[@"value"]);
}

You couldn't access the attributes in your case because you were iterating an array of HTMLNodes. A HTMLNode can be any type of DOM node, e.g. a text node or comment node, but only HTMLElements have attributes.

So in your case you have to check the node's type and cast accordingly. something like this:

for (HTMLNode *node in nodes) {
    if (node.nodeType != HTMLNodeElement) {
        continue;
    }
    HTMLElement *element = (HTMLElement *)node;
    // You logic here
}

Let me know if this answers your questions.