CODEWITHSUNDEEP
javascriptobjective-ccocoawebkitwkwebview
Daniel Shteremberg
Daniel Shteremberg

Reputation: 214

What is WKErrorWebViewInvalidated?

I have a WKWebView to which I send javascript via -[WKWebView evaluateJavaScript:completionHandler:] Periodically, the web view returns the following error:

Error Domain=WKErrorDomain Code=3 "The WKWebView was invalidated" UserInfo={NSLocalizedDescription=The WKWebView was invalidated

The corresponding WKError seems to be WKErrorWebViewInvalidated, but the WKError.h only seems to say the following about this error:

@constant WKErrorWebViewInvalidated                Indicates that the WKWebView was invalidated.

Once I receive this error from the web view I can no longer execute any subsequent javascript and I need to throw the web view away and create a new one. I've searched online for more details on this error, but have not been able to find anything of substance. Can someone help explain what this error means and how I can debug what might be causing it. Thanks.

Upvotes: 7

Views: 3489

Answers (2)

user2378197
user2378197

Reputation: 880

I had this error with a web view that was detached from the view hierarchy. Make sure your WKWebView has a superview and a window while you run the script if you see this error.

Upvotes: 4

Stefan Arentz
Stefan Arentz

Reputation: 34945

It means that the web content process has died. This is the process that runs the JavaScript and does the Networking part of the WKWebView.

Unfortunately this process is managed by WebKit and you have zero control over it. So if your device runs low on memory, there is a very good change that it will randomly kill a web content process. That is when you receive the WKErrorWebViewInvalidated error.

Upvotes: 0

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