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timerbegin		statement / function

Parameters

Parameter	Description
fireDate	Optional. The time at which the timer should first fire. This can be a CFDateRef or a double value (seconds from now). Default = NULL.
timeInterval	Optional. For a repeating timer, this parameter contains the number of seconds between firings of the timer. Default = 0.0.
repeats	Optional. If YES, the timer will reschedule itself until invalidated. If NO, the timer will be invalidated after it fires. Default = NO.

 
Return value
A new TimerRef object, configured according to the specified parameters. The return value is optional.  

Examples
(1)
timerbegin // the timer runs immediately and invalidates after it fires
// do something
timerend

(2)
timerbegin , 1.0, YES // the timer runs after 1 second and fires every second
// do something
timerend

(3)
timerbegin 3.0 // run timer in 3 seconds from now
// do something
timerend

(4)
TimerRef t = timerbegin fn DateWithTimeIntervalSinceNow(4.0), 2.0, YES // run timer in 4 seconds from now, then every 2 seconds
// do something
timerend
// do something with the returned timer ref 't'

See also
FB's Timer.incl header
 
Apple documentation
NSTimer