The concept of "Criação de Tópicos" (Topic Creation) is often associated with message brokering systems like Apache Kafka, where topics are used to categorize and manage streams of data. However, in the Apple ecosystem, such a direct equivalent does not exist. Instead, Apple environments focus more on frameworks and services for data handling, such as CloudKit for data storage and sharing, or using message queues and notifications within iOS and macOS applications.

Given this context, we will explore how to create and manage data streams and notifications within the Apple environment, which can serve similar purposes to "topics" in other ecosystems. This will include examples using CloudKit for data management and the NotificationCenter for handling notifications within apps.

Examples:

1. Using CloudKit for Data Management

CloudKit provides a robust framework for storing and retrieving data across iOS, macOS, watchOS, and tvOS. Here’s how you can create a record type in CloudKit, which can be considered analogous to creating a topic for categorizing data.

import CloudKit

let container = CKContainer.default()
let publicDatabase = container.publicCloudDatabase

let newRecord = CKRecord(recordType: "TopicRecord")
newRecord["title"] = "Sample Topic" as CKRecordValue
newRecord["description"] = "This is a sample topic description." as CKRecordValue

publicDatabase.save(newRecord) { record, error in
    if let error = error {
        print("Error saving record: \(error.localizedDescription)")
    } else {
        print("Record saved successfully")
    }
}

2. Using NotificationCenter for In-App Notifications

NotificationCenter in Apple’s ecosystem can be used to broadcast information within an app, similar to how topics might be used to notify subscribers in a message brokering system.

import Foundation

// Define a notification name
extension Notification.Name {
    static let newTopicCreated = Notification.Name("newTopicCreated")
}

// Post a notification
NotificationCenter.default.post(name: .newTopicCreated, object: nil, userInfo: ["title": "Sample Topic"])

// Add an observer for the notification
NotificationCenter.default.addObserver(forName: .newTopicCreated, object: nil, queue: .main) { notification in
    if let title = notification.userInfo?["title"] as? String {
        print("New topic created: \(title)")
    }
}