UIWebview gets stuck with the following message in console

Question

UIWebview gets stuck with the following message in console.

void SendDelegateMessage(NSInvocation*): delegate (webView:didFinishLoadForFrame:)   
failed to         


        

Answer 1

FWIW, it looks like my particular timeout was occurring due to a javascript error in rare scenarios. You might try wrapping your JS in a try/catch or improving it to be more error-tolerant.

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More details: I was using the following JS string:

NSString* js = @"document.getElementById(\"main\").offsetHeight";
int height = [[_web_view stringByEvaluatingJavaScriptFromString:js] intValue];

I knew that this UIWebView problem could happen if the web view was not fully loaded (eg. JS called before the webViewDidFinishLoad: method, so I guessed that perhaps the "main" object was missing. Thus, I modified my JS to the following and it worked:

NSString* js = @"document.getElementById(\"main\") ? document.getElementById(\"main\").offsetHeight : -1";