我想在后台运行几分钟后终止该应用程序 [英] i want to terminate the app after some minutes while it run in background

问题描述

我想在后台运行几分钟后终止该应用程序.

i want to terminate the app after some minutes while it runs in background.

这样的步骤:

按主页按钮，然后应用程序将在后台运行. 2分钟后，该应用程序自动终止.

press the home button then app run in background. 2minutes later the app terminates automaticly.

我找到一种如下的方法:

i find a method as below:

- (void)applicationDidEnterBackground:(UIApplication *)application
{
    UIApplication*    app = [UIApplication sharedApplication];

    bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
        [app endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    }];

    // Start the long-running task and return immediately.
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

        // Do the work associated with the task.

           //============================
          // here  i want to add a timer  
          //=============================  

        [app endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    });
}

如您所见， 我想在那个地方添加一个计时器.

as you see, i want to add a timer in that place.

，但计时器在后台不起作用.我也尝试了performSelector:afterdelay:

but the timer didn't work in background. i also tried the performSelector:afterdelay:

我该怎么做?

推荐答案

10分钟后，所有应用都会终止.

After 10 minutes, All app terminates.

如果您只需要在2分钟后退出应用程序，

If you have to exit app only after 2 mins,

在(applicationWillResignActive)中设置计时器

set timer in (applicationWillResignActive)

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