objective c - Time difference between set automatically and by user in iOS device -

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i'll show question example.

so, f.e., it's 12:00 (set automatically) now, user decided change current time 12:10 (it won't exact time, user wants so).

is there way 10 minutes in code?

one method connect time server on own. or, if app running when changes, keep timer running , discontinuities in time.

possible duplicate of: how can locally detect iphone clock advancement user between app runs?


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