KeyboardSpy 1.1

KeyboardSpy 1.1

LangLanguage SwiftSwift
License MIT
ReleasedLast Release Sep 2017
SwiftSwift Version 3.0
SPMSupports SPM

Maintained by Dalton Hinterscher.

  • By
  • Daltron


Written in Swift 4

KeyboardSpy is a super lightweight and easy to use wrapper that makes observing keyboard notifications in iOS a breeze.


  • iOS 8.0+
  • xCode 9.0+


KeyboardSpy uses a protocol based approach to observe keyboard notifications:

public protocol KeyboardSpyAgent {
    var keyboardEventsToSpyOn: [KeyboardSpyEvent] { get }
    func keyboardSpyEventProcessed(event:KeyboardSpyEvent, keyboardInfo: KeyboardSpyInfo)

To add a spy, simply:

KeyboardSpy.spy(on: self)

To remove a spy, simply:

KeyboardSpy.unspy(on: self)

There are six different events you can spy on:

public enum KeyboardSpyEvent {
    case willShow
    case didShow
    case willHide
    case didHide
    case willChangeFrame
    case didChangeFrame

You will get the following object for each event you spy on:

public class KeyboardSpyInfo: NSObject {
    public private(set) var beginFrame: CGRect!
    public private(set) var endFrame: CGRect!
    public private(set) var animationCurve: UIViewAnimationCurve!
    public private(set) var animationDuration: Double!
    public private(set) var isLocal: Bool!
    public var keyboardHeight: CGFloat


import KeyboardSpy

class KeyboardSpyViewController: UIViewController {
    override func viewWillAppear(_ animated: Bool) {
        KeyboardSpy.spy(on: keyboardSpyView) // This can be placed anywhere
    override func viewWillDisappear(_ animated: Bool) {
        KeyboardSpy.unspy(on: keyboardSpyView) // This can be placed anywhere

extension KeyboardSpyViewController: KeyboardSpyAgent {
    internal var keyboardEventsToSpyOn: [KeyboardSpyEvent] {
        return [.willShow, .willHide]
    internal func keyboardSpyEventProcessed(event: KeyboardSpyEvent, keyboardInfo: KeyboardSpyInfo) {
        if event == .willShow {
            // Do something like moving a view above the keyboard
        } else if event == .willHide {
            // Do something like moving a view back to its original position



Dalton Hinterscher, [email protected]


KeyboardSpy is available under the MIT license. See the LICENSE file for more info.