![swift - Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow swift - Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow](https://i.stack.imgur.com/lazOo.png)
swift - Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow
![objective c - runtime: UI API called from background thread: -[UIApplication applicationState] must be used from main thread only - Stack Overflow objective c - runtime: UI API called from background thread: -[UIApplication applicationState] must be used from main thread only - Stack Overflow](https://i.stack.imgur.com/fB8FR.png)
objective c - runtime: UI API called from background thread: -[UIApplication applicationState] must be used from main thread only - Stack Overflow
![objective c - runtime: UI API called from background thread: -[UIApplication applicationState] must be used from main thread only - Stack Overflow objective c - runtime: UI API called from background thread: -[UIApplication applicationState] must be used from main thread only - Stack Overflow](https://i.stack.imgur.com/osr3o.png)
objective c - runtime: UI API called from background thread: -[UIApplication applicationState] must be used from main thread only - Stack Overflow
UITextField.textAlignment must be used from main thread only” Can't reset TextRows in iOS 11 xcode 9.1 · Issue #1351 · xmartlabs/Eureka · GitHub
![UITextField.textAlignment must be used from main thread only” Can't reset TextRows in iOS 11 xcode 9.1 · Issue #1351 · xmartlabs/Eureka · GitHub UITextField.textAlignment must be used from main thread only” Can't reset TextRows in iOS 11 xcode 9.1 · Issue #1351 · xmartlabs/Eureka · GitHub](https://user-images.githubusercontent.com/31646541/33939410-18fc3fec-e031-11e7-9877-8fdd1188e7e7.png)
UITextField.textAlignment must be used from main thread only” Can't reset TextRows in iOS 11 xcode 9.1 · Issue #1351 · xmartlabs/Eureka · GitHub
![swift - Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow swift - Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow](https://i.stack.imgur.com/veO49.png)
swift - Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow
![How do I save the state of a UISwitch when the view changes? When I reopen the view the switch is always appearing to be in the “on” position. Here's what I've How do I save the state of a UISwitch when the view changes? When I reopen the view the switch is always appearing to be in the “on” position. Here's what I've](https://preview.redd.it/hrrturalgfi91.jpg?auto=webp&s=20a58cc6c10151ccc2a571839ef14e10122d32b3)