April 2015
Intermediate to advanced
556 pages
17h 47m
English
book
Cocoa Programming for OS X: The Big Nerd Ranch Guide
by Aaron Hillegass, Adam Preble, Nate Chandler
Content preview from Cocoa Programming for OS X: The Big Nerd Ranch Guide
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For the More Curious: Which Object Sends the Action Message?
The target on the Cut, Copy, and
Paste menu items is nil.
Sending a message to nil will not do anything.
All target-action messages are handled by NSApplication.
It has the following method:
func sendAction(_: Selector, to: AnyObject!, from: AnyObject!) -> Bool
When the target is nil, NSApplication
knows to try to send messages to the objects in the responder chain.