Objective-C Language NSTimer Manually firing a timer
Example
[timer fire];
Calling the fire method causes an NSTimer to perform the task it would have usually performed on a schedule.
In a non-repeating timer, this will automatically invalidate the timer. That is, calling fire before the time interval is up will result in only one invocation.
In a repeating timer, this will simply invoke the action without interrupting the usual schedule.
