Error shown: UIView.isHidden must be used from main thread only · Issue #5904 · mozilla-mobile/firefox-ios · GitHub
![Getting a Getting a](https://i.stack.imgur.com/Pw1q5.png)
Getting a "This application is modifying the autolayout engine from a background thread" error? - Stack Overflow
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![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
![Ways to optimize scroll performance. Yes, after having a zillion publications about this issue. | by Vladislav Alexeev | Medium Ways to optimize scroll performance. Yes, after having a zillion publications about this issue. | by Vladislav Alexeev | Medium](https://miro.medium.com/max/1000/1*wzTjgzl8b7QzUmsfcf4N2g.png)
Ways to optimize scroll performance. Yes, after having a zillion publications about this issue. | by Vladislav Alexeev | Medium
![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/13481443/39958928-712f93ea-563c-11e8-9630-e5e7b07a4e81.png)
UIView setHidden:] must be used from main thread only · Issue #46 · gang544043963/LGPhotoBrowser · GitHub
![Depression Belagerung Stereotyp uiview.hidden must be used from main thread only sofortig Schmutz Verweilen Depression Belagerung Stereotyp uiview.hidden must be used from main thread only sofortig Schmutz Verweilen](https://user-images.githubusercontent.com/69067564/97696203-3c764800-1acb-11eb-867b-312bfb5e18d6.png)