NSTimer在iPhone关闭应用程序后继续计数 [英] NSTimer Keep counting after app is closed in iPhone

问题描述

我有一个计时器必须计算最多8小时（28800秒）
之后应该发布

I have a timer that have to count up to 8 hours (28800 second) after that it should be released

我想知道如何保持计时器在后台运行和/或应用程序关闭时？

im wondering how to keep the timer running at the background and/or when application is closed?

这是NSTimer：

stopWatchTimer = [NSTimer scheduledTimerWithTimeInterval:1.0
                                                      target:self
                                                    selector:@selector(updateTimer)
                                                    userInfo:nil
                                                     repeats:YES];

这是我的条件：

 counter++;

if (counter >= 28800) {
    [stopWatchTimer invalidate];
    counter =0;

    timeLabel.text = @"Time Out";
}

推荐答案

你不能 - 一次你的应用程序已关闭，然后它不再运行，因此计时器也不会运行。

You can't - once your app is closed then it's not running anymore so the timer won't be running either.

看看本地通知？

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