Move TextField up when the keyboard has appeared in SwiftUI

I tried many of the proposed solutions, and even though they work in most cases, I had some issues – mainly with safe area (I have a Form inside TabView’s tab).

I ended up combining few different solutions, and using GeometryReader in order to get specific view’s safe area bottom inset and use it in padding’s calculation:

import SwiftUI
import Combine

struct AdaptsToKeyboard: ViewModifier {
    @State var currentHeight: CGFloat = 0
    
    func body(content: Content) -> some View {
        GeometryReader { geometry in
            content
                .padding(.bottom, self.currentHeight)
                .onAppear(perform: {
                    NotificationCenter.Publisher(center: NotificationCenter.default, name: UIResponder.keyboardWillShowNotification)
                        .merge(with: NotificationCenter.Publisher(center: NotificationCenter.default, name: UIResponder.keyboardWillChangeFrameNotification))
                        .compactMap { notification in
                            withAnimation(.easeOut(duration: 0.16)) {
                                notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect
                            }
                    }
                    .map { rect in
                        rect.height - geometry.safeAreaInsets.bottom
                    }
                    .subscribe(Subscribers.Assign(object: self, keyPath: \.currentHeight))
                    
                    NotificationCenter.Publisher(center: NotificationCenter.default, name: UIResponder.keyboardWillHideNotification)
                        .compactMap { notification in
                            CGFloat.zero
                    }
                    .subscribe(Subscribers.Assign(object: self, keyPath: \.currentHeight))
                })
        }
    }
}

extension View {
    func adaptsToKeyboard() -> some View {
        return modifier(AdaptsToKeyboard())
    }
}

Usage:

struct MyView: View {
    var body: some View {
        Form {...}
        .adaptsToKeyboard()
    }
}