Time Touch Events Take in iPhone SDK

Question

Hi Everyone:

I am wondering how I would go about measuring the time in between touches inside a view in the iPhone SDK. I know that the first event triggered is touchesBegan: and then the last one triggered is touchesEnded:, however I just don't know how I would go about measuring the time that the user has touched the view for. For instance, if they keep their finder in the view for 2 seconds, it will automatically trigger function twoSeconds: or something like that.

Thanks for any help!

Answer 1

Use [NSDate date] to get the current date and time. Store it in touchesBegan:, and fetch the duration in touchesEnded: as this

NSTimeInterval duration = [[NSDate date] timeIntervalSinceDate:beganDate];

You will now have the duration between the events measured in seconds in length.