![Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow](https://i.stack.imgur.com/teE1e.png "Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow")
Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow
getting warning must be used from main thread in Xcode 11.2 and app crashed, not getting warning in Xcode 10.2 - Stack Overflow
Xcode UIView.init(frame:) must be used from main thread only - Stack Overflow
Toggle UISwitch on/off in swift - Stack Overflow
React Native 错误must be used from main thread only - 长跑茗
Swift Error "UIButton.currentTitle must be used from main thread only" - Stack Overflow
UIの更新はmain threadから行う - code.alone
Finish reading Runloop
The real importance
画面遷移時にMain Thread Checkerのエラーが出た時の対処法(Swift) - Qiita
Bowling gemäß Ale uiswitch.on must be used from main thread only Onkel oder Herr Zeitung Tablett
Finish reading Runloop
iOS] UI API called from background thread Group · Issue #4505 · mattermost/mattermost-mobile · GitHub
Bowling gemäß Ale uiswitch.on must be used from main thread only Onkel oder Herr Zeitung Tablett
Xcode/Swift】紫の警告の対応方法：UIApplication.registerForRemoteNotifications() must be used from main thread only
UIView.layer must be used from main thread only · Issue #226 · BradLarson/GPUImage2 · GitHub
UIImageView must be used from main thread only と動作拒否されたので対応 - mayaの実験場
UIButton setEnabled:] must be used from main thread only · Issue #1 · ayakix/Image-Picker · GitHub
![iOS 11] Xcode 9で“だいぶまとも”に！新機能をまとめてみた | DevelopersIO](https://cdn-ssl-devio-img.classmethod.jp/wp-content/uploads/2017/09/xcode_9_ubs_1.png "iOS 11] Xcode 9で“だいぶまとも”に！新機能をまとめてみた | DevelopersIO")
iOS 11] Xcode 9で“だいぶまとも”に！新機能をまとめてみた | DevelopersIO
![IOS bottom layer] main thread & main runloop - 编程知识](https://inotgo.com/imagesLocal/202102/13/20210213171728768q_2.png "IOS bottom layer] main thread & main runloop - 编程知识")
IOS bottom layer] main thread & main runloop - 编程知识
![Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow](https://i.stack.imgur.com/lazOo.png "Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow")
Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow
iOS must be used from main thread only · Issue #4447 · bilibili/ijkplayer · GitHub
Creating Mobile Apps with Xamarin.Forms Preview Edition 2 | Manualzz
iOS must be used from main thread only · Issue #4447 · bilibili/ijkplayer · GitHub
