Identify submit button click of UIWebview

Question

I have a UIWebView page with multiple button . Need to identify which button is clicked of the UIWebView.

Page source for UIWebview load contents:

Answer 1

Do this with HTML Code

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:
    (NSURLRequest *)request navigationType: 
    (UIWebViewNavigationType)navigationType {
        if ([request.URL.scheme isEqualToString:@"inapp"]) {
            if ([request.URL.host isEqualToString:@"capture"]) {
            // do capture action
        }  
        return NO;
     }  

   return YES;
}