'Detecting Day Change in iOS App
So I've been doing a bit of research on how to tell if it's a new day in my iOS app. Basically, I want to reset a bunch of values to 0 as soon as a new day starts. I've seen that I can use "UIApplicationSignificantTimeChangeNotification" which sends a notification at midnight. However, will this still fire if the user killed the app at 9:00AM and opens it up again at 9:00AM the next day?
I also saw that I could use "NSCalendarDayChangedNotification" which to my understanding has the same behavior. My only concern is that if either of these will accomplish detecting a day change even after the user kills the app.
Ideally I'd like to put add the notification observer at the top of my .m file in the viewDidLoad like so:
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(resetValues) name:UIApplicationSignificantTimeChangeNotification object:nil];
and then somewhere else in the file...
- (void)resetValues {
... // reset values to 0
}
The goal would be for this notification to trigger at the beginning of every day change. Would the code above achieve the behavior I'm looking for?
Solution 1:[1]
System observer:
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(reloadData) name:NSCalendarDayChangedNotification object:nil];
https://developer.apple.com/documentation/foundation/nscalendardaychangednotification?language=objc
Sources
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Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 |