In Xcode 14 & iOS 16 purple warnings starting with 'This method should not be called on the main thread as it may lead to UI unresponsiveness.'

Question

When loading the URL in WKWebView, it leads to a security warning and later app gets crashes.

Warning in UIApplicationMain -

This method should not be called on the main thread as it may lead to UI unresponsiveness.

How can I resolve this issue?

same exact issue, anyone would be able to solve this? Putting web views certificate validation on DispatchQueue.global(qos: .background).async { } doesn't help. — Async-, Nov 03 '22 at 09:55
same issue as I wrapped a WKWebView in `UIViewRepresentable`. I've also changed the code running by `WKNavigationDelegate`calls to dispatch on main. Still getting this. — zumzum, Nov 21 '22 at 20:33

score 34 · Answer 1 · edited Jan 01 '23 at 17:33

34

Good in-depth reply from an Apple employee on the forums.

The poor interaction between WKWebView, Security framework, and this Xcode feature is a known issue (r. 94019453). We plan to address it at some point but I don’t have any info to share as to when that’ll happen.

edited Jan 01 '23 at 17:33

Spevacus

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answered Dec 27 '22 at 19:30

Grant Kamin

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score 15 · Answer 2 · edited Nov 05 '22 at 00:43

15

Apparently, it is either an Xcode bug or an unnecessary "perfect optimization" notification.

As I'm writing, there isn't any reported solution on the Apple developer website.

You can see a good discussion on UI unresponsiveness" warning on @main.

edited Nov 05 '22 at 00:43

Peter Mortensen

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answered Nov 04 '22 at 02:01

Filipe Canzi

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In Xcode 14 & iOS 16 purple warnings starting with 'This method should not be called on the main thread as it may lead to UI unresponsiveness.'

2 Answers2

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