ToastManager.swift

Purpose

ToastManager.swift is a lightweight utility class that provides simple toast-like message functionality for iOS using UIAlertController. It enables temporary messages to be shown in the app without requiring any third-party dependencies.

Key Features

  • Singleton design for global access.

  • Presents a UIAlertController with a message.

  • Automatically dismisses the alert after a specified duration.

Design Pattern

static let shared = ToastManager()
private init() {}

Implements the Singleton pattern to ensure a single shared instance throughout the app.

Method: showToast

func showToast(message: String, duration: TimeInterval = 2.0, in viewController: UIViewController?)

  • message: The string to display in the toast.

  • duration: How long the toast should be shown (defaults to 2 seconds).

  • viewController: The current UIViewController to present from.

Behavior:

  1. Creates a UIAlertController with no title and the message body.

  2. Presents the alert on the provided view controller.

  3. Uses DispatchQueue.main.asyncAfter(...) to dismiss the alert after the duration.

Example usage:

ToastManager.shared.showToast(message: "Sensor connected", in: self)

Use Cases

  • Notifying the user when a sensor connects or disconnects.

  • Alerting of a successful file save or error.

  • Displaying non-intrusive status updates in test builds.