Countdown timer

[thomisso]

Please help. I want to create countdown timer using iphone sdk. I have current time:

NSDate *today = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"HH:mm"];
NSString *currentTime = [dateFormatter stringFromDate:today];
[dateFormatter release];

and time(s) from database. Eg.: currentTime is 19:18:30, time from database is 19:20:01. So the timer should be set to 0:01:31 and begin the countdown. When reach the 0:00:00, take another time from database (eg: 19:21:00), set up timer (0:00:59) and star countdown again. When reach the 0:00:00, take... The timer should be displayed by UILabel.

Please help. It begins to make me mad.

[DenVog]

Originally Posted by thomisso

Please help. I want to create countdown timer using iphone sdk.

There are quite a few existing threads on this topic. I swear this was asked less than a week ago. There are also example apps online. In short, you need to get start time and end time. Compare the two. Count.

Docs you want to look at are timeIntervalSinceDate in NSDate Class Reference.

Give it a shot, and and if you can't get it working post your code.