Should set web view's config "allowFileAccessFromFileURLs" to true

like this;
`[_webview.configuration.preferences setValue:@(true) forKey:@"allowFileAccessFromFileURLs"];`

So when load local file, it can access all the resources in "allowingReadAccessToURL" folder.

In my project, the js code (loaded by the web view) reference one html file. If not set the config "allowFileAccessFromFileURLs", the html file can not be accessed with the error:
"XMLHttpRequest cannot load _**the referenced html file path**_. Cross origin requests are only supported for HTTP."

Start by locating where the WKWebView configuration and preferences are set, then trace the local-file loading path described in the issue. Verify that enabling allowFileAccessFromFileURLs lets JavaScript-loaded HTML access resources within the allowingReadAccessToURL folder, without the reported cross-origin error.

Written by the indexing model from the issue text.