Fire Notification if User Doesn’t open app in 24 hours

Swift function that checks if the app hasn’t been opened in 24 hours and triggers a local notification with an attractive message. This function is independent, so you can call it from anywhere in your app, like inside your ContentView or any other view

Here’s an updated version of the function that calculates the remaining time until the 24-hour mark and schedules the notification accordingly:

import UserNotifications

func scheduleNotificationIfAppNotOpenedWithin24Hours() {
    // Request notification permissions first
    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound]) { granted, error in
        if let error = error {
            print("Error requesting notification permissions: \(error)")
            return
        }
        
        if granted {
            print("Notification permission granted.")
            
            // Proceed with scheduling the notification based on the app's last opened date
            let lastOpenedDate = UserDefaults.standard.object(forKey: "lastOpenedDate") as? Date
            let currentDate = Date()

            // If the app has never been opened, save the current date and exit
            if lastOpenedDate == nil {
                UserDefaults.standard.set(currentDate, forKey: "lastOpenedDate")
                print("First launch, saving the current…