Catch JavaScript exceptions from WebView in ios

Question

I need to catch errors that occur in WebView if WebView is present in the screen. That is not to bind to a specific WebView.

Answer 1

Not sure if you have already tried this solution,You can catch the exception in your JS code and call a native method to log this information. You can inject this native method implementation into JS context of the UIWebview after a receiving below UIWebView delegate callback that JS context for the webView has been created.

- (void)webView:(id)webView didCreateJavaScriptContext:(JSContext *)context forFrame:(id)frame {
//this injects the MyNativeLog in your UIWebView JS context and you can call this function in your JS code.
context[@"MyNativeLog"] = ^(NSString *string){
            NSLog(@"%@", string);
        };
}

Hope this helps!!