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Last active September 10, 2018 09:49
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How to generate haptic feedback with UIFeedbackGenerator.
//
// TapticEngine.swift
// AGBaseProject
//
// Created by Ashvin Gudaliya on 2017/04/09.
//
//
import UIKit
/// Generates iOS Device vibrations by UIFeedbackGenerator.
open class TapticEngine {
public static let impact: Impact = Impact()
public static let selection: Selection = Selection()
public static let notification: Notification = Notification()
/// Wrapper of `UIImpactFeedbackGenerator`
open class Impact {
/// Impact feedback styles
///
/// - light: A impact feedback between small, light user interface elements.
/// - medium: A impact feedback between moderately sized user interface elements.
/// - heavy: A impact feedback between large, heavy user interface elements.
public enum ImpactStyle {
case light, medium, heavy
}
private var style: ImpactStyle = .light
private var generator: Any? = Impact.makeGenerator(.light)
private static func makeGenerator(_ style: ImpactStyle) -> Any? {
guard #available(iOS 10.0, *) else { return nil }
let feedbackStyle: UIImpactFeedbackStyle
switch style {
case .light:
feedbackStyle = .light
case .medium:
feedbackStyle = .medium
case .heavy:
feedbackStyle = .heavy
}
let generator: UIImpactFeedbackGenerator = UIImpactFeedbackGenerator(style: feedbackStyle)
generator.prepare()
return generator
}
private func updateGeneratorIfNeeded(_ style: ImpactStyle) {
guard self.style != style else { return }
generator = Impact.makeGenerator(style)
self.style = style
}
public func feedback(_ style: ImpactStyle) {
guard #available(iOS 10.0, *) else { return }
updateGeneratorIfNeeded(style)
guard let generator = generator as? UIImpactFeedbackGenerator else { return }
generator.impactOccurred()
generator.prepare()
}
public func prepare(_ style: ImpactStyle) {
guard #available(iOS 10.0, *) else { return }
updateGeneratorIfNeeded(style)
guard let generator = generator as? UIImpactFeedbackGenerator else { return }
generator.prepare()
}
}
/// Wrapper of `UISelectionFeedbackGenerator`
open class Selection {
private var generator: Any? = {
guard #available(iOS 10.0, *) else { return nil }
let generator: UISelectionFeedbackGenerator = UISelectionFeedbackGenerator()
generator.prepare()
return generator
}()
public func feedback() {
guard #available(iOS 10.0, *) else { return }
guard let generator = generator as? UISelectionFeedbackGenerator else { return }
generator.selectionChanged()
generator.prepare()
}
public func prepare() {
guard #available(iOS 10.0, *) else { return }
guard let generator = generator as? UISelectionFeedbackGenerator else { return }
generator.prepare()
}
}
/// Wrapper of `UINotificationFeedbackGenerator`
open class Notification {
/// Notification feedback types
///
/// - success: A notification feedback, indicating that a task has completed successfully.
/// - warning: A notification feedback, indicating that a task has produced a warning.
/// - error: A notification feedback, indicating that a task has failed.
public enum NotificationType {
case success, warning, error
}
private var generator: Any? = {
guard #available(iOS 10.0, *) else { return nil }
let generator: UINotificationFeedbackGenerator = UINotificationFeedbackGenerator()
generator.prepare()
return generator
}()
public func feedback(_ type: NotificationType) {
guard #available(iOS 10.0, *) else { return }
guard let generator = generator as? UINotificationFeedbackGenerator else { return }
let feedbackType: UINotificationFeedbackType
switch type {
case .success:
feedbackType = .success
case .warning:
feedbackType = .warning
case .error:
feedbackType = .error
}
generator.notificationOccurred(feedbackType)
generator.prepare()
}
public func prepare() {
guard #available(iOS 10.0, *) else { return }
guard let generator = generator as? UINotificationFeedbackGenerator else { return }
generator.prepare()
}
}
}
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