/**
* Constructs a new Timer object with the specified delay
* and repeatCount states.
*
* The timer does not start automatically; you must call the start() method
* to start it.
* @param delayThe delay between timer events, in milliseconds. A delay lower than 20 milliseconds is not recommended. Timer frequency
* is limited to 60 frames per second, meaning a delay lower than 16.6 milliseconds causes runtime problems.
* @param repeatCountSpecifies the number of repetitions.
* If zero, the timer repeats infinitely.
* If nonzero, the timer runs the specified number of times and then stops.
* @langversion 3.0
* @playerversion Flash 9
* @playerversion Lite 4
* @throws Error if the delay specified is negative or not a finite number
*/
public function Timer (delay:Number, repeatCount:int=0);
var timer:Timer = new Timer(20, 0);
timer.addEventListener(TimerEvent.TIMER, timerListener);timer.start();
使用Timer作爲計時器使用時,參數delay最好不用小於20毫秒,否則容易出現運行問題。