Databases
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    <p>When the application enters the background if it requires additional time to complete some task you will want to notify the OS of that. The detailed documentation is here: <a href="http://developer.apple.com/library/ios/#DOCUMENTATION/iPhone/Conceptual/iPhoneOSProgrammingGuide/ManagingYourApplicationsFlow/ManagingYourApplicationsFlow.html" rel="nofollow">http://developer.apple.com/library/ios/#DOCUMENTATION/iPhone/Conceptual/iPhoneOSProgrammingGuide/ManagingYourApplicationsFlow/ManagingYourApplicationsFlow.html</a>. Here's a quick and dirty patch.</p> <pre><code>- (void)applicationDidEnterBackground:(UIApplication *)application { __block UIBackgroundTaskIdentifier backgroundTask; //Create a task object backgroundTask = [application beginBackgroundTaskWithExpirationHandler: ^ { [application endBackgroundTask:background_task]; backgroundTask = UIBackgroundTaskInvalid; //Set the task to be invalid }]; dispatch_queue_t opQ = dispatch_queue_create("com.myapp.network", NULL); dispatch_async(opQ, ^{ [self sendNetworkData1]; [self sendNetworkData2]; [self sendNetworkData3]; [application endBackgroundTask:background_task]; backgroundTask = UIBackgroundTaskInvalid; //Set the task to be invalid }); } </code></pre> <p>The bottom line is that you notify that the application needs to run in the background with beginBackgroundTaskWithExpirationHandler: THen when your done you call endBackgroundTask: to notify the OS that you are finished processing in the background. And finally make sure that you reset the backgroundTask variable to UIBackgroundTaskInvalid.</p>
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    1. POKeep a dispatch queue running for 5 sec after moving to the background
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    1. COI need it to be compatible with iOS 3.x though, which I believe this method isn't, right?
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    2. COThat's right, this won't be compatible with iOS 3.x. I imagine that it is pretty safe at this point to drop support for iOS 3.x.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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