UI API called from background thread: -[UIView bounds] must be used from main thread only · Issue #262 · LaiFengiOS/LFLiveKit · GitHub
![UIView setHidden:] must be used from main thread only · Issue #46 · gang544043963/LGPhotoBrowser · GitHub UIView setHidden:] must be used from main thread only · Issue #46 · gang544043963/LGPhotoBrowser · GitHub](https://user-images.githubusercontent.com/13481443/39958918-6391ef76-563c-11e8-92e0-ec35bbea24e8.png)
UIView setHidden:] must be used from main thread only · Issue #46 · gang544043963/LGPhotoBrowser · GitHub
Error shown: UIView.isHidden must be used from main thread only · Issue #5904 · mozilla-mobile/firefox-ios · GitHub
![Getting a "This application is modifying the autolayout engine from a background thread" error? - Stack Overflow Getting a "This application is modifying the autolayout engine from a background thread" error? - Stack Overflow](https://i.stack.imgur.com/Pw1q5.png)