KeyboardResponder.swift (2124B)
1 // MIT License 2 // Copyright © Nicolai Harbo 3 // 4 // Permission is hereby granted, free of charge, to any person obtaining a copy of this software 5 // and associated documentation files (the "Software"), to deal in the Software without restriction, 6 // including without limitation the rights to use, copy, modify, merge, publish, distribute, 7 // sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 8 // furnished to do so, subject to the following conditions: 9 // 10 // The above copyright notice and this permission notice shall be included in all copies or 11 // substantial portions of the Software. 12 // 13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 14 // BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 16 // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 17 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 18 // 19 import Combine 20 import UIKit 21 22 @MainActor 23 public final class KeyboardResponder: ObservableObject { 24 25 @Published public var keyboardHeight: CGFloat = 0 26 var showCancellable: AnyCancellable? 27 var hideCancellable: AnyCancellable? 28 29 public init() { 30 showCancellable = NotificationCenter.default.publisher(for: UIResponder.keyboardWillShowNotification) 31 .map { notification in 32 (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue.height ?? 0.0 33 } 34 .receive(on: DispatchQueue.main) 35 .sink(receiveValue: { height in 36 // print("keyboard height: \(height)") 37 self.keyboardHeight = height 38 }) 39 40 hideCancellable = NotificationCenter.default.publisher(for: UIResponder.keyboardWillHideNotification) 41 .receive(on: DispatchQueue.main) 42 .sink(receiveValue: { _ in 43 self.keyboardHeight = 0 44 }) 45 } 46 }