Haptics in SwiftUI (https://alexisonline.dev/bytes/byte-2020-08-20-haptics)

byte-2020-08-20-haptics.swift

// Author: Alexis Akers
// License:
// This code is published under the public domain. The software is provided "as is" without warranty
// of any kind and I cannot be held liable for any issue arising from its usage.

/// An object that performs haptic feedback.
struct Haptics {
    /// Performs a success haptic feedback.
    func success() {
        let feedbackGenerator = UINotificationFeedbackGenerator()
        feedbackGenerator.prepare()
        feedbackGenerator.notificationOccurred(.success)
    }
}

// MARK: - Environment

private enum HapticsEnvironmentKey: EnvironmentKey {
    static let defaultValue = Haptics()
}

extension EnvironmentValues {
    /// Returns the object responsible for performing haptic feedback in the view hierarchy. 
    var haptics: Haptics {
        get { self[HapticsEnvironmentKey.self] }
        set { self[HapticsEnvironmentKey.self} = newValue }
    }
}

// MARK: - Example

struct ContentView: View {
    @Environment(\.haptics) private var haptics
    
    var body: some View {
        Button(action: buttonTapped) {
            Text("Tap Me!")
        }
    }
    
    private func buttonTapped() {
        haptics.success()
    }
}