Pre-fill WebView text fields

Question

I need to pre-fill text fields in a `UIWebView` and am given to understand that `javascript` is the best way to go about this. Unfortunately I know nothing of `javascript` and have been fumbling about for the last few hours, getting nowhere. Latest botched attempt: ``` - (void)webViewDidFinishLoad:(UIWebView *)webView { // username field id = username_5 & pw field id = password_5 NSString *javascript = @"\ var user = 'testUser';\ var pw = 'testPW';\ document.getElementById('username_5').value = user; \ document.getElementById('password_5').value = pw; \ ;"; // Execute JS [_emailWebView stringByEvaluatingJavaScriptFromString:javascript]; } ``` Can anyone point me in the right direction? -EDIT- I also tried tried delaying the call in case the page had not fully loaded and if I call something like: ``` - (void)webViewDidFinishLoad:(UIWebView *)wv { [NSObject cancelPreviousPerformRequestsWithTarget:self]; [self performSelector:@selector(injectJavascript) withObject:nil afterDelay:1.0]; }…

Accepted Answer

I had obtained the element IDs by highlighting them in Firefox and selecting `inspect element`. Turns out this gives different IDs to those returned with:

```
NSString *body = [self.emailWebView stringByEvaluatingJavaScriptFromString:
                  @"document.getElementsByTagName('body')[0].outerHTML"];            
NSLog(@"%@", body);
```

Plugging these IDs (which apparently vary dependent upon what was used to navigate to the page) into:

```
[self.emailWebView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.getElementById('username').value = '%@';", user]];
[self.emailWebView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.getElementById('password').value = '%@';", pw]];
[self.emailWebView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.getElementById('input_LoginPage-ipad_1').click();"]];
```

Solved it.

Thanks for all your help folks.

Pre-fill WebView text fields

Solution

Problem