iOS - Adding Advertiser ID param to all url in webview

customWebview.m

#pragma mark - WebView

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{

    NSString *url = request.URL.absoluteString;
    NSString *advertiserId = [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString];
    NSString *adIdParam = [NSString stringWithFormat:@"api_user_id=%@",advertiserId];
    NSRange extraParam = [url rangeOfString:adIdParam];
    if (extraParam.location == NSNotFound) {
        if ([url rangeOfString:@"?"].location == NSNotFound) {
            url = [url stringByAppendingString:@"?"];
        }
        else {
            url = [url stringByAppendingString:@"&"];
        }

        url = [url stringByAppendingString:adIdParam];
        
        NSURLRequest *newRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:url]];
        [webView loadRequest:newRequest];
        
        return NO;
    }
    
    return YES;
}