Delphi IOS 后台定时器

3.这里有一个问题，就是客户端是通过心跳来和服务端保持连接，心跳是由定时器触发的，当我退到后台以后，定时器方法被挂起，那么通过如下设置来在后台运行定时器
-
(void)applicationDidEnterBackground:(UIApplication
*)application{

UIApplication*
app = [UIApplication sharedApplication];

__block
UIBackgroundTaskIdentifier bgTask;

bgTask
= [app beginBackgroundTaskWithExpirationHandler:^{

dispatch_async(dispatch_get_main_queue(),
^{

if

(bgTask != UIBackgroundTaskInvalid)

{

bgTask
= UIBackgroundTaskInvalid;

}

});

}];

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,
0),
^{

dispatch_async(dispatch_get_main_queue(),
^{

if

(bgTask != UIBackgroundTaskInvalid)

{

bgTask
= UIBackgroundTaskInvalid;

}

});

});

}

Delphi IOS 后台定时器

原文：http://www.cnblogs.com/cb168/p/5137457.html