When an iOS application goes to the background, are lengthy tasks paused?

Question

Yes, I know if I wish my app to be responsive to users\' multitasking actions, such as switch to another app, I should deal with

- (void)applicationWillResi         


        

Answer 1

If you are doing some operation which might consume time and you don't want to kill it then you can extend the time for your operation by executing in UIBackground Task i

{
    UIBackgroundTaskIdentifier  taskId = 0;
    taskId = [application beginBackgroundTaskWithExpirationHandler:^{
        taskId = UIBackgroundTaskInvalid;
    }];

// Execute long process. This process will have 10 mins even if your app goes in background mode.

}

The block argument called "handler" is what will happen when the background task expire (10min). Here is a link to the documentation