NSNotification

## UIApplicationSignificantTimeChangeNotification : 날짜 시간이 변경될때 알림 NSNotificationCenter *noteCenter = [NSNotificationCenter defaultCenter]; [noteCenter addObserver:self selector:@selector(notiSignificantTimeChanged:) name:UIApplicationSignificantTimeChangeNotification object:nil]; - (void)notiSignificantTimeChanged:(NSNotification *)notification { }

2021.05.31