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    <p>Here is what apple has to say about what you are doing <a href="http://developer.apple.com/library/ios/#documentation/cocoa/reference/foundation/Classes/NSRunLoop_Class/Reference/Reference.html" rel="nofollow">in the documentation</a></p> <blockquote> <p><strong>run</strong></p> <p>Puts the receiver into a permanent loop, during which time it processes data from all attached input sources.</p> <ul> <li>(void)run Discussion If no input sources or timers are attached to the run loop, this method exits immediately; otherwise, it runs the receiver in the NSDefaultRunLoopMode by repeatedly invoking runMode:beforeDate:. In other words, this method effectively begins an infinite loop that processes data from the run loop’s input sources and timers.</li> </ul> <p>Manually removing all known input sources and timers from the run loop is not a guarantee that the run loop will exit. Mac OS X can install and remove additional input sources as needed to process requests targeted at the receiver’s thread. Those sources could therefore prevent the run loop from exiting.</p> <p>If you want the run loop to terminate, you shouldn't use this method. Instead, use one of the other run methods and also check other arbitrary conditions of your own, in a loop. A simple example would be:</p> <p>BOOL shouldKeepRunning = YES;<br> // global NSRunLoop *theRL = [NSRunLoop currentRunLoop]; while (shouldKeepRunning &amp;&amp; [theRL runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]]); where shouldKeepRunning is set to NO somewhere else in the program.</p> <p>Availability Available in iOS 2.0 and later.</p> </blockquote> <p>So it looks like your code is doing what it is supposed to do. It is Logging all the timer events and waiting indefinitely for the run loop.</p>
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    1. POObjective C: App freezes when using a timer
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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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