inessential by Brent Simmons

Kyle on targetViewController

Kyle Sluder, targetViewController​ForAction:​sender: is smarter than it seems:

targetViewController​ForAction:​sender: does indeed walk the view controller hierarchy, sending -canPerformAction:​withSender: on the way. But if a view controller returns YES, it will then determine whether the instance’s method for that selector is an override of a UIViewController implementation for the same selector. If not, it keeps looking up the chain.

That’s kind of weird. But, well, it’s pragmatic, too.