IOS Miscellaneous Pen -8 (Loadview, Viewdidload, Viewwillappear, viewdidappear, etc.)

Loadview;
This is where subclasses should create their custom view hierarchy if they aren ' t using a nib. Should never be called directly.
This is when they are not using the NIB View page, and the subclass will create its own custom view layer. Must not be called directly.

－－－－－－－－－－－－
Viewdidload;
Called after the view has been loaded. For view controllers created in code, this is After-loadview. For view controllers unarchived from a nib, which is after the view is set.
Called after the view is loaded, if the view loader is created in code, he will be called after the Loadview method, and if it is output from the nib View page, it will be called after the view has been set up.

－－－－－－－－－－－－

Viewwillappear:

Called when the view was about to made visible. Default does nothing
Called when the view is about to be visible. No action is taken by default

－－－－－－－－－－－－

Viewdidappear:
Called when the view had been fully transitioned onto the screen. Default does nothing
Called when the view has completely transitioned to the screen

－－－－－－－－－－－－
Viewwilldisappear:
Called when the view is dismissed, covered or otherwise hidden. Default does nothing
The view is dismissed when called, overwritten, or otherwise hidden. No action is taken by default

－－－－－－－－－－－－
Viewdiddisappear:
Called after the view is dismissed, covered or otherwise hidden. Default does nothing
The view is dismissed after it is called, overwritten, or otherwise hidden. No action is taken by default

IOS Miscellaneous Pen -8 (Loadview, Viewdidload, Viewwillappear, viewdidappear, etc.)