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    <p>Here is a drop-in category on <code>UIPopoverController</code> that does what you're asking.</p> <p>Basically the category swizzles <code>initWithContentViewController:</code> so that it can track live <code>UIPopoverController</code> instances in a <code>NSHashTable</code> (which doesn't itself hold the contained UIPopoverControllers alive since it keeps weak references to them.) It also monitors for <code>UIApplicationDidEnterBackgroundNotification</code>, and when this arrives it iterates the collection of live UIPopoverControllers and dismisses any that are showing.</p> <p>It might be nice to extend this to implement the "never allow two popovers to show at once" rule that Apple has.</p> <p>I'm not a huge fan of method swizzling in production apps but this seems pretty safe.</p> <p>No special instructions for use. Just include the category in your project and use your UIPopoverControllers normally.</p> <pre><code>#import &lt;objc/runtime.h&gt; @interface UIPopoverController (autodismiss) @end @implementation UIPopoverController (autodismiss) static NSHashTable* ts_popoverHashTable; + (void) load { SEL originalSelector = @selector(initWithContentViewController:); SEL replacementSelector = @selector(ts_initWithContentViewController:); Method originalMethod = class_getInstanceMethod( [UIPopoverController class], originalSelector); Method replacementMethod = class_getInstanceMethod( [UIPopoverController class], replacementSelector); method_exchangeImplementations(originalMethod, replacementMethod); [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector( applicationDidEnterBackgroundNotification: ) name: UIApplicationDidEnterBackgroundNotification object: nil]; } - (id) ts_initWithContentViewController: (UIViewController*) contentViewController { UIPopoverController* pc = [self ts_initWithContentViewController: contentViewController]; static dispatch_once_t onceToken; dispatch_once(&amp;onceToken, ^{ ts_popoverHashTable = [NSHashTable weakObjectsHashTable]; }); [ts_popoverHashTable addObject: pc]; return pc; } + (void) applicationDidEnterBackgroundNotification: (NSNotification*) n { for ( UIPopoverController* pc in ts_popoverHashTable ) { if ( pc.isPopoverVisible ) { [pc dismissPopoverAnimated: NO]; } } } @end </code></pre>
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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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