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[iOS] Typist:简单、易用的 Keyboard 事件监听管理小类库

Typist

Typist is 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.

Installation

CocoaPods

You can use CocoaPods
to install Typist
by adding it to your Podfile
:

platform :ios, '10.0'
use_frameworks!
pod 'Typist'

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

import UIKit
import Typist

Manually

Download and drop Typist.swift
in your project.

Usage

Delcare what should happen on what event and start()
listening to keyboard events. That’s it.

let keyboard = Typist.shared

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()

}

Usage of both—singleton, or your own instance of Typist
—is considered to be OK depending on what do you want to accomplish.

You must
call start()
for callbacks to be triggered. Calling stop()
on instance will stop callbacks from trigering, but callbacks themselfs won’t be dismissed, thus you can resume event callbacks by calling start()
again.

To removed all event callbacks, call clear()
. Passing nil
instead of closure also removes event callback.

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 of this key 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 window’s contents as a result of interface orientation changes. Thus, you may need to convert the rectangle to window coordinates (using the convertRect:fromWindow:
    method) or to view coordinates (using the convertRect:fromView:
    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 window’s contents as a result of interface orientation changes. Thus, you may need to convert the rectangle to window coordinates (using the convertRect:fromWindow:
    method) or to view coordinates (using the convertRect:fromView:
    method) before using it.

  • animationCurve

    UIViewAnimationCurve
    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.

Events

Following keyboard events are supported:

  • willShow
  • didShow
  • willHide
  • didHide
  • willChangeFrame
  • didChangeFrame

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

Licence

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

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