Foxbrush

# Lifecycle Overview

  - Preparation if being segued to

  - Outlet setting

  - Appearing and disappearing

  - Geometry (Orientation) changes

  - Low-memory warning 

# Lifecyle Methods 

  - func awakeFromNib()

    > ALways call super.awakeFromNib()

    > Sent to each object recreated from a nib archive, but only after all the objects in the archive have been loaded and initialized.

    > At this point MVC is not yet loaded

  - override func viewDidLoad()

    > Always call super.viewDidLoad()

    > Called when outlets are loaded so a good place to set up UI

    > But the geometry (view's bounds) is not yet set so uncertain of iPhone size or iPad size. Do not do works about geometry here.

  - func viewWillAppear(animated: Bool)

    > Called when view is about to appear.

    > Could happen a lot unlike viewDidLoad happens only once.

    > Geometry data is available at this point.

  - func viewDidAppear(animated: Bool)

    > Called when view appeared

  - override func viewWillDisappear(animated: Bool)

    > Always call super.viewWillDisappear(animated)

    > Clean up stuffs here

    > Do not do too many clean-up works here. If required, then, use another thread to do works.

  - func viewDidDisappear(animated: Bool)

    > Called when view disappeared

  - func viewWillLayoutSubViews() and func viewDidLayoutSubViews()

    > Called when view's frame chages and its subviews is re-layed out, like autorotation case.

    > Reset subviews or do geometry-related works here.

    > Most of the time the autolayout handles geometry changes for you so you do not have to handle these 2 methods.

  - func viewWillTransitionToSize(size: CGSize, transitoinCoord: UIViewControllerTransitionCoordinator)

    > Called when screen rotation happens

    > transitoinCoord provides a method to let you animate alongside the rotation animation.

  - func didReceiveMemoryWarning()

    > Called when memory available is low