Documentation set generation tool in Xcode is necessary for a prosperous Apple developer community. The current tools are far from Apple standard.
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.
KVO is a very nice programming facility, except for some annoying defects.
When a UITableViewCell gets highlighted it highlights all its subviews, which is annoying sometimes.