Domanda di colloquio di Goqii Technologies
1. What is NSNotification?
Risposta di colloquio
Anonimo
4 ago 2016
An NSNotificationCenter object (or simply, notification center) provides a mechanism for broadcasting information within a program. An NSNotificationCenter object is essentially a notification dispatch table. addObserver:selector:name:object: or addObserverForName:object:queue:usingBlock: methods