Data unbinding cannot be safely done for UITableViewCell or UICollectionViewCell.

How to use UIViewController actor chain on iOS 8 and how it is implemented.

Code depending on the order of view transition events is dangerous for it is so inconsistent.

What happens if the button is tapped again during the view transition triggered by tapping it?

When a UITableViewCell gets highlighted it highlights all its subviews, which is annoying sometimes.

Apple taught me most I need to know about how to manage the interface orientation, yet still left some dark corners. I explored them and want to share what I found.