Keyboard

Never implement NSNotification.Name.UIKeyboardDidShow ever again. Ever.

Yeah, seriously. Handling the keyboard on iOS shouldn't be painful. But it is.

So instead of doing a whole lot of calculations, or embedding everything in UIScrollViews, import Keyboard and get on with your life.

Specs

• iOS 9+
• Swift 3.3+

Usage

Step 1:

Make your view controller conform to the KeyboardChangeHandler protocol:

import Keyboard


class ViewController: UIViewController, KeyboardChangeHandler {

Step 2:

Start handling keyboard notifications:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    becomeKeyboardChangeHandler()
}

override func viewWillDisappear(_ animated: Bool) {
    resignKeyboardChangeHandler()

    super.viewWillDisappear(animated)
}

Step 3:

ctrl + drag to your favorite NSLayoutConstraint:

Step 4:

Get on with your life

Goodies

Keyboard comes with a couple of niceties you might enjoy:

• The Keyboard singleton:

Keyboard.default.isVisible //tells you if the keyboard is currently visible
Keyboard.default.currentFrame //tells you the keyboard's frame

• Turning keyboard handling off:

class ViewController: UIViewController {
    override func awakeFromNib() {
        super.awakeFromNib()

        //do this if you have set up a bunch of outlets on Interface Builder
        //but don't want Keyboard to work on this view controller for now
        handlesKeyboard = false
    }
}

• Keyboard margin:

override func viewDidLoad() {
    super.viewDidLoad()

    [...]

    //adds a margin between the keyboard and the currently active text input
    //defaults to 40.0
    keyboardMargin = 60.0
}

• Finding the currently active text input:

self.view.currentFirstResponder
UIResponder.currentFirstResponder

Notes

• If the Simulator doesn't show the keyboard straight away, press cmd+K.

• You may get the following messages on the console (which don't affect the library in any way):

    _BSMachError: (os/kern) invalid capability (20)
    _BSMachError: (os/kern) invalid name (15)

Migrating

• From v0.6.0: Check this out if you're migrating from version 0.6.0.

Installation

Cocoapods

pod 'Keyboard', '~> 1.0'

Then import Keyboard where needed.

Carthage

github "BellAppLab/Keyboard" ~> 1.0

Then import Keyboard where needed.

Swift Package Manager

dependencies: [
    .package(url: "https://github.com/BellAppLab/Keyboard", from: "1.0")
]

Then import Keyboard where needed.

Git Submodules

cd toYourProjectsFolder
git submodule add -b submodule --name Keyboard https://github.com/BellAppLab/Keyboard.git

Then drag the Keyboard folder into your Xcode project.

Author

Bell App Lab, apps@bellapplab.com

Credits

Logo image by Gregor Cresnar from The Noun Project

License

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