To create a local notification in Swift, you will need to use the UserNotifications framework. Here is an example of how to do this:
import UserNotifications
// Create the notification content
let content = UNMutableNotificationContent()
content.title = "Title of your notification"
content.body = "Body of your notification"
// Set the trigger for the notification
let date = Date().addingTimeInterval(10) // 10 seconds from now
let dateComponents = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute, .second], from: date)
let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: false)
// Create the request for the notification
let request = UNNotificationRequest(identifier: "YourNotificationIdentifier", content: content, trigger: trigger)
// Add the request to the notification center
UNUserNotificationCenter.current().add(request) { (error) in
if let error = error {
print("Error adding notification request: \(error)")
}
}
This code will create a notification that will be triggered 10 seconds from the time it is added to the notification center. When the notification is triggered, it will display the title and body that you set in the content object.
In Swift, a class can inherit properties and methods from another class, which is known as inheritance. This allows the child class (also known as the subclass) to reuse the functionality of the parent class (also known as the superclass), and to extend or modify that functionality as needed.
Here is an example of how to define a superclass and a subclass in Swift:
class Vehicle {
var numberOfWheels: Int
var color: String
init(numberOfWheels: Int, color: String) {
self.numberOfWheels = numberOfWheels
self.color = color
}
func startEngine() {
print("Vroom!")
}
}
class Bicycle: Vehicle {
var hasBasket: Bool
init(numberOfWheels: Int, color: String, hasBasket: Bool) {
self.hasBasket = hasBasket
super.init(numberOfWheels: numberOfWheels, color: color)
}
override func startEngine() {
// Bicycles don't have engines, so we'll just print a message instead
print("Pedaling along...")
}
}
In this example, the Vehicle class is the superclass, and the Bicycle class is the subclass. The Bicycle class inherits the numberOfWheels and color properties, as well as the startEngine() method from the Vehicle class. It also adds its own hasBasket property and overrides the startEngine() method to provide its own implementation.
You can then create instances of the Bicycle class and use them like this:
In this code, the myBike variable is an instance of the Bicycle class, which inherits the properties and methods of the Vehicle class and provides its own implementation of the startEngine() method. When you call the startEngine() method on the myBike instance, it uses the implementation provided by the Bicycle class, which prints the message “Pedaling along…”.
Auto-renewable subscriptions provide access to content, services, or premium features in your app on an ongoing basis. They automatically renew at the end of their duration until the user chooses to cancel. Subscriptions are available on iOS, iPadOS, macOS, watchOS, and tvOS.
Great subscription apps justify the recurring payment by providing ongoing value and continually innovating the app experience. If you’re considering implementing the subscription model, plan to regularly update your app with feature enhancements or expanded content.
To offer subscriptions, youʼll need to configure them in App Store Connect and use StoreKit APIs in your app. You’ll also need to assign each subscription to a subscription group (a group of subscriptions with different access levels, prices, and durations that people can choose from), then add details such as a name, price, and description. This information displays in the In-App Purchases section of your app’s product page on the App Store. Ensure that the subscriptions are available across all device types that your app supports. Consider allowing a way for subscribers to see the status of their subscription within your app, along with upgrade, crossgrade, and downgrade options, as well as a way to easily manage or turn off their auto-renewable subscription. Make sure to follow our design and review guidelines.
