如何为NSTimer赋值 [英] How to value for NSTimer

问题描述

我正在开发一个用户必须选择时间的应用程序，例如5分钟，10分钟或15分钟，然后计时器将运行约15秒并调用另一个函数.计时器应每15分钟运行一次秒，我已经实现了上面的事情，它正在工作，我唯一没有得到的是如何在15秒的时间范围内运行NSTimer 5分钟或10分钟，就像计时器应该在15秒左右的时间内运行时间间隔， 5分钟后，它应该停止.

I am making on application in which user have to select the time, example 5 min or 10 min or 15 min and after that the timer will run arround 15 seconds and will called another function.Timer should have to run after every 15 seconds, i have implemented the above the things and it is working, The only thing which i am not getting is that how to run NSTimer for 5 mins or 10 mins with 15 seconds timeframe, Like timer should run time interval for arround 15 seconds and after 5 minutes it should stop.

推荐答案

您每15秒钟触发一次计时器，并在计时器触发方法中继续添加时间，当时间达到10分钟(或15分钟)时，停止计时器.

You fire timer every 15 seconds and in the timer fire method, keep adding the time and when time reaches 10 mins (or 15 mins), stop the timer.

[NSTimer scheduledTimerWithTimeInterval:15.0f target:self selector:@selector(timerFireMethod:) userInfo:nil repeats:YES];

-(void) timerFireMethod:(NSTimer *) theTimer {
    _elapsedTime += 15.0f;
    if (_elapsedTime >= 5.0 * 60) {
        // elapsed time is 5 mins.
        [theTimer invalidate];
    }
}

这篇关于如何为NSTimer赋值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！