At what moment is an object created?

An object in iOS is created at:

1. Initialization of a class or structure (creating an instance).

class MyClass {
    init() {
        // Initialization code
    }
}

let myObject = MyClass() // Creating an instance of MyClass

struct MyStruct {
    var value: Int

    init(value: Int) {
        self.value = value
    }
}

let myStructInstance = MyStruct(value: 10) // Creating an instance of MyStruct

2. Deserialization of data (e.g., from JSON).

struct User: Codable {
    let name: String
    let age: Int
}

let jsonData = """
{
    "name": "Alice",
    "age": 30
}
""".data(using: .utf8)!

let decoder = JSONDecoder()
if let user = try? decoder.decode(User.self, from: jsonData) {
    // user is the created User object
}

3. Using factory methods that return a new instance.

class MyFactory {
    static func createObject() -> MyClass {
        return MyClass() // Factory method creates and returns a new object
    }
}

let anotherObject = MyFactory.createObject()

4. Creating Core Data objects via NSEntityDescription.insertNewObject(forEntityName:into:).

import CoreData

// Assume context is an existing NSManagedObjectContext
if let entity = NSEntityDescription.entity(forEntityName: "MyEntity", in: context) {
    let myCoreDataObject = NSManagedObject(entity: entity, insertInto: context) // Creating a Core Data object
    // Setting properties of the object
}

5. Loading objects from Interface Builder (XIB/Storyboard), where objects are defined (e.g., ViewController).

import UIKit

let storyboard = UIStoryboard(name: "Main", bundle: nil)
if let viewController = storyboard.instantiateViewController(withIdentifier: "MyViewController") as? MyViewController {
    // viewController is the created MyViewController object
}

The moment of creation is determined by calling the initializer (init) or a method that performs the creation of a new instance.