Question

In my game players will be able to plant a tree, which will take 3 hours to grow. When the player logs back in how would I calculate whether that tree is now fully grown? the creation date of the tree (planted) will be stored on a server, and I will be storing the 3 hours in seconds (not sure if that should be an int of NSNumber) also on the server.

Thanks for any help.

Answer 1

Get your creation date back from the server as an NSDate, and use timeIntervalSinceDate: like so:

NSDate *now = [NSDate date];
NSTimeInterval secondsSincePlanting = [now timeIntervalSinceDate:plantingDate];
if (secondsSincePlanting > secondsRequiredForTreeToFullyGrow) {
   ...
}