UILabelLifeCycle

class CustomLabel: UILabel {
    
    override func willMoveToSuperview(newSuperview: UIView?) {
        print("willMoveToSuperview")
    }
    
    override func didMoveToSuperview() {
        print("didMoveToSuperview")
    }

    override func willMoveToWindow(newWindow: UIWindow?) {
        print("willMoveToWindow")
    }
   
    override func didMoveToWindow() {
        print("didMoveToWindow")
    }
    
    override func didAddSubview(subview: UIView) {
        print("didAddSubview")
    }
    
    override func willRemoveSubview(subview: UIView) {
        print("willRemoveSubview")
    }
    
    override func drawTextInRect(rect: CGRect) {
        print("drawTextInRect")
    }
}

UIViewControllerLifeCycle

class CustomView: UIViewController{

    override func viewDidLoad() {
        super.viewDidLoad()
        print("viewDidLoad")
    }
    
    override func viewWillAppear(animated: Bool) {
        super.viewDidDisappear(animated)
        print("viewWillAppear")
    }
    
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        print("viewDidAppear")
    }
   
    override func viewWillDisappear(animated: Bool) {
        super.viewWillDisappear(animated)
        print("viewWillDisappear")
    }
    
    override func viewDidDisappear(animated: Bool) {
        super.viewDidDisappear(animated)
        print("viewDidDisappear")
    }
}