How to get the keyboard height on multiple screens with SwiftUI and move the button

Question

The following code gets the keyboard height when the keyboard is displayed and moves the button by the keyboard height.

This movement is performed in the same way at the

Answer 1

SwiftUI + Combine

@Published var keyboardHeight: CGFloat = 0 // if one is in ViewModel: ObservableObject

private var cancellableSet: Set = []
    
init() {
        
     NotificationCenter.default.publisher(for: UIWindow.keyboardWillShowNotification)
       .map {
             guard
                 let info = $0.userInfo,
                 let keyboardFrame = info[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect
                 else { return 0 }

             return keyboardFrame.height
         }
         .assign(to: \.keyboardHeight, on: self)
         .store(in: &cancellableSet)
        
     NotificationCenter.default.publisher(for: UIWindow.keyboardDidHideNotification)
         .map { _ in 0 }
         .assign(to: \.keyboardHeight, on: self)
         .store(in: &cancellableSet)
    }