Cocoa Programming for OS X: The Big Nerd Ranch Guide

NSEvent

We discussed NSEvent in terms of mouse events in the previous chapter. Here are some of the properties commonly used when getting information about a keyboard event:

v​a​r​ ​c​h​a​r​a​c​t​e​r​s​:​ ​S​t​r​i​n​g​!​ ​{​ ​g​e​t​ ​}​

Returns the characters created by the event.

v​a​r​ ​A​R​e​p​e​a​t​:​ ​B​o​o​l​ ​{​ ​g​e​t​ ​}​

true if the key event is a repeat caused by the user holding the key down; false if the key event is new.

v​a​r​ ​k​e​y​C​o​d​e​:​ ​U​I​n​t​1​6​ ​{​ ​g​e​t​ ​}​

Returns the code for the keyboard key that caused the event.

v​a​r​ ​m​o​d​i​f​i​e​r​F​l​a​g​s​:​ ​N​S​E​v​e​n​t​M​o​d​i​f​i​e​r​F​l​a​g​s​ ​{​ ​g​e​t​ ​}​

Returns an integer bit field indicating the modifier keys in effect ...