iOS Lifecycle

In iOS development, the lifecycle of a view controller in Swift refers to the series of methods that are called as the view controller is created, displayed, and dismissed. These methods include:

viewDidLoad(): Called when the view controller's view is first loaded into memory. This is a good place to perform initial setup, such as configuring the view or creating and initializing subviews.

override func viewDidLoad() {
    super.viewDidLoad()
    print("View did load")
    setupView()
    fetchData()
}

viewWillAppear(_:): Called just before the view controller's view is about to be displayed on the screen. This is a good place to perform any last-minute configuration or updates.

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    print("View will appear")
    updateView()
}

viewDidAppear(_:): Called after the view controller's view has been displayed on the screen. This is a good place to start animations or start updating data.

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    print("View did appear")
    startAnimations()
}

viewWillDisappear(_:): Called just before the view controller's view is about to be removed from the screen. This is a good place to stop animations or stop updating data.

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    print("View will disappear")
    stopAnimations()
}

viewDidDisappear(_:): Called after the view controller's view has been removed from the screen. This is a good place to perform any cleanup or release any resources.

override func viewDidDisappear(_ animated: Bool) {
    super.viewDidDisappear(animated)
    print("View did disappear")
    clearData()
}

deinit: Called when the view controller is deallocated from memory. This is a good place to perform any final cleanup or release any remaining resources.

deinit {
    print("View controller deallocated")
    releaseResources()
}