Ensure User has entered string in correct format?

Posted by Daniel Granger on Stack Overflow See other posts from Stack Overflow or by Daniel Granger
Published on 2010-04-24T20:42:56Z Indexed on 2010/04/24 21:03 UTC
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Hi,

Whats the best way to ensure the user has entered a valid time string such as:

5:24 5.4

102:30 102.5

It will be entered into a UITextField therefore will be in a NSString.

I want to allow the user to enter the time in either hours and minutes (hh:mm) or hours and decimal minutes (hh.m).

In the hours minutes example they should be able to enter as many hours as the like but only between 0 - 59 minutes. With the hours decimal minutes I want them to only be able to enter again as many hours as the like but decimal minutes can only be 0 - 9.

Many Thanks

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