将NSTimer的发射时间重置为从现在起，而不是最后的火 [英] Reset an NSTimer's firing time to be from now instead of the last fire

问题描述

我有一个 NSTimer ，以3秒的间隔触发，以减少一个值。当我做一个动作增加那个值，我想重新启动计时器从这一点计数3秒。

I have a NSTimer that fires with an interval of 3 seconds to decrease a value. When I do an action that increases that value, I want to restart the timer to count 3 seconds from that point.

例如，如果我增加的值，火灾在1秒钟，我想改变，使定时器火在3秒，而不是。我可以使计时器无效并再次创建吗？或者我可以使用 setFireDate：使用当前日期并添加3秒的间隔吗？

For example, if I increase the value and timer will fires in 1 second, I want to change that and make the timer fire in 3 seconds instead. Can I invalidate the timer and create it again? Or can I do it with setFireDate:, using the current date and adding an interval of 3 seconds?

推荐答案

是的，您可以使其失效。并再次创建它。

Yes, you can invalidate it. And create it again.

您也可以使用：

- (void) myTimedTask {
    // other stuff this task needs to do

    // change the variable varyingDelay to be 1s or 3s or...  This can be an instance variable or global that is changed by other parts of your app
    // weStillWantTimer is also a similar variable that your app uses to stop this recurring task

if (weStillWantTimer)
       [self performSelector:@selector(myTimedTask:) withObject:gameColor afterDelay:varyingDelay];

 }

您调用myTimedTask来启动重复任务。启动后，您可以使用varyDelay更改延迟或使用weStillWantTimer停止它。

You call myTimedTask to start the recurring task. Once it is started, you can change the delay with varyingDelay or stop it with weStillWantTimer.

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