Context
I have WKWebViewone that I programmatically embed in UIView, and this one UIViewis built in UIScrollView.
To visualize:

and here is a simplified version of what I did:
UIScrollView
|
+---- UIView
| |
| +-- UIButton
| |
| +-- UILabel
|
+---- UIView
|
+-- WKWebView
I don't want to scroll WKWebView, and I turned it off by entering the following script page on the page.
document.ontouchmove = function(event) { event.preventDefault(); }
Problem
Currently, scrolling does not work when I entered WKWebView. But as soon as I slammed back to UIViewabove, I can scroll again. I added a GIF below what happened. The red section is WKWebView, and the green is UIView.

What I've done
I disabled scrolling with scrollEnabledand it doesn’t work as I can still scroll WKWebView.
webView.scrollView.scrollEnabled = false
webView.scrollView.bounces = false
javascript - ( )
document.ontouchmove = function(event) { event.preventDefault(); }
UITableViewController , .
: