iOS: Update launch screen dynamically
This is not possible, the story board used at launch time is in the main bundle of the application which is readonly and can not be changed.
Also you (edit) can't run any code on startup, since your app is not running.
Dynamically change launch image in iOS
The default image for an iphone app must be a fixed image file in your bundle. You cannot change it dynamically.
However, you can have a dynamic image that appears when the app loads after the launch image. You can set that up with animations or simply to select a random image each time.
Dark mode launch screen in iOS 13
When setting up the Launch Screen storyboard, set the view "Background" color to "System Background Color". This will be white in light mode and black in dark mode. No need to use your own color asset.
Replace Launch screen text on each app login
You can't assign custom VC to that launch (only static images or text dragged from Object Library ) , if you want to make splash make it in the rootVC then navigate to the mainVC
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