It is a way to detect keyboard height and appearance with SwiftUI. It is implemented using Combine Frame Work.
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| import SwiftUI | |
| struct ContentView: View { | |
| @State var text: String = "" | |
| @ObservedObject var keyboard: KeyboardObserver = KeyboardObserver() | |
| var body: some View { | |
| VStack { | |
| TextField("Input Your Text", text: $text) | |
| .padding() | |
| Text("KeyboardHeight: \(keyboard.height)") | |
| Text("\(keyboard.isShowing ? "Keyboard Is Showing" : "Keyboard Is Not Showing")") | |
| Spacer() | |
| }.onAppear{ | |
| self.keyboard.addObserver() | |
| }.onDisappear { | |
| self.keyboard.removeObserver() | |
| } | |
| } | |
| } | |
| struct ContentView_Previews: PreviewProvider { | |
| static var previews: some View { | |
| ContentView() | |
| } | |
| } |
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| import SwiftUI | |
| class KeyboardObserver: ObservableObject { | |
| @Published var isShowing = false | |
| @Published var height: CGFloat = 0 | |
| func addObserver() { | |
| NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow(_:)), name: UIResponder.keyboardWillShowNotification, object: nil) | |
| NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide(_:)), name: UIResponder.keyboardWillHideNotification, object: nil) | |
| } | |
| func removeObserver() { | |
| NotificationCenter.default.removeObserver(self,name: UIResponder.keyboardWillShowNotification,object: nil) | |
| NotificationCenter.default.removeObserver(self,name: UIResponder.keyboardWillHideNotification,object: nil) | |
| } | |
| @objc func keyboardWillShow(_ notification: Notification) { | |
| isShowing = true | |
| guard let userInfo = notification.userInfo as? [String: Any] else { | |
| return | |
| } | |
| guard let keyboardInfo = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else { | |
| return | |
| } | |
| let keyboardSize = keyboardInfo.cgRectValue.size | |
| height = keyboardSize.height | |
| } | |
| @objc func keyboardWillHide(_ notification: Notification) { | |
| isShowing = false | |
| height = 0 | |
| } | |
| } |