When to use didMoveToWindow method?

Question

I have been searching around for this particular method:didMoveToWindow() however I haven't found any concrete information.
Could someone explain why and when should someone use this method and when is it called?

Answer 1

This method is called by iOS when a UIView is added to the Window object. You are supposed to override it to make your app do something at the same that.

The default implementation of this method does nothing. Subclasses can override it to perform additional actions whenever the window changes.

The window property may be nil by the time that this method is called, indicating that the receiver does not currently reside in any window. This occurs when the receiver has just been removed from its superview or when the receiver has just been added to a superview that is not attached to a window. Overrides of this method may choose to ignore such cases if they are not of interest.

https://developer.apple.com/reference/uikit/uiview/1622527-didmovetowindow