Finding and auto-filling HTML login forms in a UIWebView using JavaScript

Question

i have a UIWebView which acts like an internet browser and loads the HTML of the webpages that it is at.

in the webViewController, the method webViewDidFinishLoad, w

Answer 1

I had some problems with finding the fields, so I adapted the code to target the fields more specific:

   - (void)webViewDidFinishLoad:(UIWebView*)theWebView
    {

    NSString *savedUsername = @"username";
    NSString *savedPassword = @"pass";

      if (savedUsername.length != 0 && savedPassword.length != 0) {

          NSString *loadUsernameJS = [NSString stringWithFormat:@"var inputFields = document.getElementsByTagName('input'); \
                                for (var i = inputFields.length >>> 0; i--;) { if(inputFields[i].name == 'username') inputFields[i].value = '%@';}", savedUsername];

          NSString *loadPasswordJS = [NSString stringWithFormat:@" \
                                for (var i = inputFields.length >>> 0; i--;) { if(inputFields[i].name == 'password') inputFields[i].value = '%@';}", savedPassword];

    //autofill the form
       [theWebView stringByEvaluatingJavaScriptFromString: loadUsernameJS];
       [theWebView stringByEvaluatingJavaScriptFromString: loadPasswordJS];
      }


    return [super webViewDidFinishLoad:theWebView];
  }