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This is basic of swift, I hope you designed it on
LaunchScreen.storyboardwhich acts as the Splash screen of the application. -
Your problem is you designed your view in
LaunchScreen.storyboardso it stayed only for 5 seconds, now the solution is design your view inMain.storyboardso that you will see yourUIControlsorUIElements.
Hope it helps.
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solved Why the UI elements disappear in seconds in Xcode 11.3? [duplicate]