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extension NSTimer {
/**
Creates and schedules a one-time `NSTimer` instance.
:param: delay The delay before execution.
:param: handler A closure to execute after `delay`.
:returns: The newly-created `NSTimer` instance.
*/
class func schedule(#delay: NSTimeInterval, handler: NSTimer! -> Void) -> NSTimer {
let fireDate = delay + CFAbsoluteTimeGetCurrent()
let timer = CFRunLoopTimerCreateWithHandler(kCFAllocatorDefault, fireDate, 0, 0, 0, handler)
CFRunLoopAddTimer(CFRunLoopGetCurrent(), timer, kCFRunLoopCommonModes)
return timer
}
/**
Creates and schedules a repeating `NSTimer` instance.
:param: repeatInterval The interval between each execution of `handler`. Note that individual calls may be delayed; subsequent calls to `handler` will be based on the time the `NSTimer` was created.
:param: handler A closure to execute after `delay`.
:returns: The newly-created `NSTimer` instance.
*/
class func schedule(repeatInterval interval: NSTimeInterval, handler: NSTimer! -> Void) -> NSTimer {
let fireDate = interval + CFAbsoluteTimeGetCurrent()
let timer = CFRunLoopTimerCreateWithHandler(kCFAllocatorDefault, fireDate, interval, 0, 0, handler)
CFRunLoopAddTimer(CFRunLoopGetCurrent(), timer, kCFRunLoopCommonModes)
return timer
}
}
// Usage:
var count = 0
NSTimer.schedule(repeatInterval: 1) { timer in
println(++count)
if count >= 10 {
timer.invalidate()
}
}
NSTimer.schedule(delay: 5) { timer in
println("5 seconds")
}
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