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    <p>From the <a href="https://developer.apple.com/library/ios/#documentation/Cocoa/Reference/Foundation/Classes/nstimer_Class/Reference/NSTimer.html" rel="nofollow noreferrer">NSTimer</a> documentation...</p> <blockquote> <p>A timer is not a real-time mechanism; it fires only when one of the run loop modes to which the timer has been added is running and able to check if the timer’s firing time has passed. Because of the various input sources a typical run loop manages, the effective resolution of the time interval for a timer is limited to on the order of 50-100 milliseconds. If a timer’s firing time occurs during a long callout or while the run loop is in a mode that is not monitoring the timer, the timer does not fire until the next time the run loop checks the timer. Therefore, the actual time at which the timer fires potentially can be a significant period of time after the scheduled firing time.</p> </blockquote> <p>Your timer resolution is 10 milliseconds, so if the run loop doesn't not complete quickly enough (under 10 milliseconds), you'll start to notice a lag between real-time, and your counters.</p> <p>If you are implementing a game, devs will generally try to disassociate from the CPU or clock speed.</p> <p>Take a look at this <a href="https://stackoverflow.com/questions/1351234/how-make-a-game-loop-on-the-iphone-without-using-nstimer">answer</a></p> <p>or take a look at how a framework like <a href="http://www.cocos2d-iphone.org/wiki/doku.php/prog_guide:best_practices" rel="nofollow noreferrer">cocos2d</a> implements its own scheduler. </p>
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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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