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I'm using a Share Extension to upload an article object to Firebase. That works fine, but I can't get the Success Alert to show up without getting a "modifying autolayout engine from background thread" error.

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1 Answers1

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Then your alert code is being called from a background thread. Instead do something like:

dispatch_async(dispatch_get_main_queue()) {
    // put your UIAlertController code in this completion block
}
par
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