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https://github.com/totocaster/Typist

Swift UIKit keyboard manager for iOS apps.
https://github.com/totocaster/Typist

event-callback keyboard keyboard-events keyboard-layout keyboard-listeners

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Swift UIKit keyboard manager for iOS apps.

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README 

        
# Typist



![Swift Version](https://img.shields.io/badge/swift-5-orange.svg?style=flat)

[![Platform](https://img.shields.io/cocoapods/p/Typist.svg?style=flat)](http://cocoapods.org/pods/Typist)

[![CocoaPods Compatible](https://img.shields.io/cocoapods/v/Typist.svg)](https://img.shields.io/cocoapods/v/Typist.svg)

[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/totocaster/Typist)

[![Accio supported](https://img.shields.io/badge/Accio-supported-0A7CF5.svg?style=flat)](https://github.com/JamitLabs/Accio)

[![Twitter](https://img.shields.io/badge/[email protected])](http://twitter.com/totocaster)



Typist is a small, drop-in Swift UIKit keyboard manager for iOS apps. It helps you manage keyboard's screen presence and behavior without notification center and Objective-C.



---



## Usage



Declare what should happen on what event and `start()` listening to keyboard events. That's it.



```swift

let keyboard = Typist.shared // use `Typist()` whenever you can, see note on singleton usage below



func configureKeyboard() {



    keyboard

        .on(event: .didShow) { (options) in

            print("New Keyboard Frame is \(options.endFrame).")

        }

        .on(event: .didHide) { (options) in

            print("It took \(options.animationDuration) seconds to animate keyboard out.")

        }

        .start()



}

```



You _must_ call `start()` for callbacks to be triggered. Calling `stop()` on instance will stop callbacks from triggering, but callbacks themselves won't be dismissed, thus you can resume event callbacks by calling `start()` again.



To remove all event callbacks, call `clear()`.



#### Interactivity and `inputAccessoryView`



You can dismiss keyboard interactively when using Typist with `UIScrollView` instances.



```swift

let keyboard = Typist()



func configureKeyboard() {



    keyboard

        .toolbar(scrollView: tableView) // Enables interactive dismissal

        .on(event: .willChangeFrame) { (options) in

            // You are responsible animating inputAccessoryView

        }

        .on(event: .willHide)  { (options) in

            // Triggered when keyboard is dismissed non-interactively.

        }

        .start()



}

```



`.on(event: .willChangeFrame, do: {...})` will update as frequently as keyboard frame changes due to UIScrollView scrolling. It is good practice to implement `.willHide` portion as well since keyboard might be dismissed non-interactively, for example, using `resignFirstResponder()`.



Example from above is [implemented in demo app](Typist/ViewController.swift).



#### On Singleton Usage



Usage of `shared` singleton, considered to be OK for convenient access to instance. However, it is strongly recommended to instantiate dedicated `Typist()` for each usage (in `UIViewController`, most likely). **Do not use singleton** when two or more objects using `Typist.shared` are presented on screen simultaneously, as it will cause one of the controllers to fail receiving keyboard events.



### Event Callback Options



Every event callback has a parameter of `Typist.KeyboardOptions` type. It is an inert/immutable struct which carries all data that keyboard has at the event of happening:



* **`belongsToCurrentApp`** — `Bool` that identifies whether the keyboard belongs to the current app. With multitasking on iPad, all visible apps are notified when the keyboard appears and disappears. The value is `true` for the app that caused the keyboard to appear and `false` for any other apps.

* **`startFrame`** — `CGRect` that identifies the start frame of the keyboard in screen coordinates. These coordinates do not take into account any rotation factors applied to the view’s contents as a result of interface orientation changes. Thus, you may need to convert the rectangle to view coordinates (using the `convert(CGRect, from: UIView?)` method) before using it.

* **`endFrame`** — `CGRect` that identifies the end frame of the keyboard in screen coordinates. These coordinates do not take into account any rotation factors applied to the view’s contents as a result of interface orientation changes. Thus, you may need to convert the rectangle to view coordinates (using the `convert(CGRect, from: UIView?)` method) before using it.

* **`animationCurve`** — `UIView.AnimationCurve` constant that defines how the keyboard will be animated onto or off the screen.

* **`animationDuration`** — `Double` that identifies the duration of the animation in seconds.

* **`animationOptions`** — `UIView.AnimationOptions` helper property that maps the `animationCurve` to its respective `UIView.AnimationOptions` value. Usefull when performming view animations using `UIView.animate(...`.  



### Events



Following keyboard events are supported:



* `willShow`

* `didShow`

* `willHide`

* `didHide`

* `willChangeFrame`

* `didChangeFrame` – e.g. when keyboard is dynamically dismissed from scroll view interaction.



If you declare two closures on same event, only latter will be executed.



---



## Installation



#### CocoaPods

You can use [CocoaPods](http://cocoapods.org/) to install `Typist` by adding it to your `Podfile`:



```ruby

platform :ios, '8.0'

use_frameworks!

pod 'Typist'

```



Import `Typist` wherever you plan to listen to keyboard events. Usually in your `UIViewController` subclasses.



``` swift

import UIKit

import Typist

```



#### Carthage

Create a `Cartfile` that lists the framework and run `carthage update`. Follow the [instructions](https://github.com/Carthage/Carthage#if-youre-building-for-ios) to add `$(SRCROOT)/Carthage/Build/iOS/Typist.framework` to an iOS project.



```

github "totocaster/Typist"

```



#### Accio



Initialize your project with [Accio](https://github.com/JamitLabs/Accio) using the `init` command.



Add the following to your Package.swift:



```swift

.package(url: "https://github.com/totocaster/Typist.git", .upToNextMajor(from: "1.4.2")),

```



Next, add `Typist` to your App targets dependencies like so:



```swift

.target(

    name: "App",

    dependencies: [

        "Typist",

    ]

),

```



Then run `accio update`.



#### Manually

Download and drop ```Typist.swift``` in your project.



---



My thanks to [Jake Marsh](https://twitter.com/jakemarsh) for featuring Typist on Little Bites of Cocoa [#282: Taming the Keyboard with Typist ⌨️](https://littlebitesofcocoa.com/282-taming-the-keyboard-with-typist). It made my day.



---



## License



Typist is released under the MIT license. See ``LICENSE`` for details.