Warning when update version IOS from 12.0 to 14.0

This list fixing warning

1. 'keyWindow' was deprecated in iOS 13.0: Should not be used for applications that support multiple scenes as it returns a key window across all connected scenes

and this how I solve it

before:

safeArea = UIApplication.shared.keyWindow?.safeAreaInsets ?? UIEdgeInsets.zero

After:

safeArea = UIApplication.shared.windows.filter {$0.isKeyWindow}.first?.safeAreaInsets ?? UIEdgeInsets.zero

2.Terminating app due to uncaught exception 'RLMException', reason: 'No properties are defined for 'RealmObject'. Did you remember to mark them with '@objc' in your model?'

Error SubString to String?

normal code 

let date = 
let splitDate = date.split(separator: "-")