Objective-C: Set UIWebView's ScrollView

I am trying to set the webview's scrollview using the code below but it disabled the scrolling/interaction of the webview.

[webView sizeToFit];
    webView.scrollView.scrollEnabled = YES;
    webView.scrollView.contentSize = CGSizeMake(375, rfqWeb.scrollView.contentSize.height + 700);
    rfqWeb.userInteractionEnabled = YES;