CODEWITHSUNDEEP
iosxcodecocoa
T_T
T_T

Reputation: 437

Auto-detect time of day

I'm writing a daily to do list app, and want the app to update certain elements with each new day. This isn't a problem if the user closes the app one day and then reopens it the next -- I just compare days in the startup methods.

However, this is a problem if the user happens to be using the app exactly at midnight. At midnight, daily task elements need to reset themselves automatically for the new day.

Here's my issue -- I could have a constant thread running in the background, always accessing [NSDate date] and checking for a new day. But I feel like there must be a better way, especially because this only has to happen once per day (and then, only if the user is using the app at midnight).

Thank you in advance!

Upvotes: 3

Views: 328

Answers (1)

Nikolai Ruhe
Nikolai Ruhe

Reputation: 81868

In applicationDidFinishLaunching: and applicationWillEnterForeground:, setup an NSTimer scheduled to trigger at midnight. Also, register for UIApplicationSignificantTimeChangeNotification to reschedule the timer for time zone changes etc.

Upvotes: 2

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