Accuracy of NSTimer

Question

I am trying to use NSTimer to create a Stop-watch style timer that increments every 0.1 seconds, but it seems to be running too fast sometimes ..

This is how I\'ve

Answer 1

maxTime=maxTime+0.1;

This is the wrong way to go. You don't want to use a timer to accumulate the elapsed time because you'll be accumulating error along with it. Use the timer to periodically trigger a method that calculates the elapsed time using NSDate, and then updates the display. So, change your code to do something instead:

maxTime = [[NSDate date] timeIntervalSince:startDate];