Accessing text from a JavaScript class in iPhone SDK

I have been attempting to extract specific information from Gmail using javascript, but so far, I have not been successful. The code snippet that I am trying to retrieve is below:

<a href="https://mail.google.com/mail/u/0/#inbox" target="_top" class="J-Ke n0" title="Inbox (182)" tabindex="0">Inbox (182)</a>

My goal is to capture the text "Inbox (182)." To achieve this, I have implemented the following line of code:

    NSString *js_result = [webview1 stringByEvaluatingJavaScriptFromString:@"document.getElementsByClassName('J-Ke n0').innerText"];

Unfortunately, this approach has not yielded any results as I receive an empty result. I have explored several alternatives without success. Any guidance on how to successfully extract the "Inbox (182)" text would be greatly appreciated. Thank you.

javascriptiosios4xcode4

Answer №1

Your JavaScript code might need some adjustments, especially because there are several elements with the same class name. For example, when I log in to my Gmail account, I use this line of code:

document.getElementsByClassName('J-Ke n0')[0].innerText

However, using this method in a live environment may not be ideal due to its fragility. Google could easily modify the class or element order at any time.

Additionally, ensure that the page has fully loaded before running the JavaScript code. This can often be done by utilizing a webViewDidFinishLoad: callback function. If your code is correct but still not producing results, this could be the underlying issue.

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