com apple WebKit WebContent drops 113 error Could not find specified service

Question

I am using WKWebView for viewing custom HTML     Regardless of HTML content  when testing on real device  I receive the following error Could not signal service com apple WebKit WebContent  113  Could not find specified service in 29 sec after WKWebView content loaded  sometimes I even receive this error twice  Clearly  it is a configuration issue  I have checked cookies as proposed in Could not signal service com apple WebKit WebContent  however it doesn t help Another question is whether there exist a list of all error codes that might pop up in WKWebView

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I got this error loading a http    URL where the server replied with a redirect to https  After changing the URL I pass to WKWebView to https       it worked

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I had this problem I iOS 12 4 when calling evaluateJavascript  I solved it by wrapping the call in DispatchQueue main async

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I too faced this problem when loading an  http  url in WKWebView in iOS 11  it is working fine with https   What worked for me was setting App transport setting in info pist file to allow arbitary load    lt key gt NSAppTransportSecurity lt  key gt       lt dict gt           lt  --Not a recommended way  there are better solutions available-- gt           lt key gt NSAllowsArbitraryLoads lt  key gt           lt true  gt       lt  dict gt

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On OS X  it s necessary to make sure Sandbox capabilities are set-up properly in order to use WKWebView   This link made this clear to me  https   forums developer apple com thread 92265  Sharing hoping that it will help someone     Select the Project File in the Navigator  select Capabilities  then make sure that     App Sandbox is OFF  OR    App Sandbox is ON AND Outgoing Connections  Client  is checked

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Mine was different again  I was setting the user-agent like so       NSString  jScript     var meta   document createElement  meta    meta setAttribute  name    viewport    meta setAttribute  content    width device-width    document getElementsByTagName  head   0  appendChild meta         WKUserScript  wkUScript     WKUserScript alloc  initWithSource jScript injectionTime WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly YES     This was causing something on the web page to freak out and leak memory  Not sure why but removing this sorted the issue for me

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Deleting commenting  -  void viewWillAppear  BOOL animated   super viewWillAppear YES      function solved the problem for me    XCode  11 3 1

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Perhaps the below method could be the cause if you ve set it to   func webView   webView  WebView  decidePolicyForNavigationAction actionInformation   AnyHashable   Any    request  URLRequest   frame  WebFrame   decisionListener listener  WebPolicyDecisionListener      ends with    decisionHandler  cancel    for the default navigationAction request url  Hope it works

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Just for others reference  I seemed to have this issue too if I tried to load a URL that had whitespace at the end  was being pulled from user input

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Maybe it s an entirely different situation  but I always got WebView 43046 188825  Could not signal service com apple WebKit WebContent  113  Could not find specified service  when opening a webpage on the simulator while having the debugger attached to it  If I end the debugger and opening the app again the webpage will open just fine  This doesn t happen on the devices   After spending an entire work-day trying to figure out what s wrong  I found out that if we have a framework named Preferences  UIWebView and WKWebView will not be able to open a webpage and will throw the error above   To reproduce this error just make a simple app with WKWebView to show a webpage  Then create a new framework target and name it Preferences  Then import it to the main target and run the simulator again  WKWebView will fail to open a webpage   So  it might be unlikely  but if you have a framework with the name Preferences  try deleting or renaming it   Also  if anyone has an explanation for this please do share   BTW  I was on Xcode 9 2

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SWIFT  Well I did this in the following order and didn t get any error like Could not signal service com apple WebKit WebContent  113  Could not find specified service after that  following code might help you too   webView   WKWebView frame  self view frame  self view addSubview self view webView  webView navigationDelegate   self webView loadHTMLString htmlString  baseURL  nil    Do as order   Thanks

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In my case I was launching a WKWebView and displaying a website   Then  within 25 seconds  I deallocated the WKWebView   But 25-60 seconds after launching the WKWebView I received this  113  error message   I assume the system was trying to signal something to the WKWebView and couldn t find it because it was deallocated   The fix was simply to leave the WKWebView allocated

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Finally  solved the problem above  I was receiving errors   Could not signal service com apple WebKit WebContent  113  Could not find specified service   Since I have not added WKWebView object on the view as a subview and tried to call -loadHTMLString baseURL  on the top of it  And only after it was successfully loaded I was adding it to view s subviews - which was totally wrong  The correct solution for my problem is   1  Add WKWebView object to view s subviews array  2  Call -loadHTMLString baseURL  for recently added WKWebView

[ios] com.apple.WebKit.WebContent drops 113 error: Could not find specified service

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