StackOverflow2013

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copied!<p>We've run into a similar challenge. But there's a problem with either solution: there's a 'bug' in how Apple handles ranging and proximity, and you'll get random toggling and didExitRegion calls. </p> <p>See here:</p> <p><a href="http://beekn.net/2013/11/ibeacon-tutorial-dealing-with-errors/" rel="nofollow">http://beekn.net/2013/11/ibeacon-tutorial-dealing-with-errors/</a></p> <p>Your app will call a didExitRegion seemingly at random, clearly a bug, because Location Services can actually shut down entirely for a second or so.</p> <p>We handled the viewController idea by stopping ranging once the viewController is pushed and then restarting it once the user closes the viewController.</p> <ol> <li>After: [self performSegueWithIdentifier:@"mainToContent" sender:self];</li> </ol> <p>Add: </p> <p>[self.locationManager stopRangingBeaconsInRegion:self.beaconRegion];</p> <ol> <li>In order to restart ranging once the user closes the viewController, add:</li> </ol> <p>// ViewWillAppear restarts stopRanging when OutsideViewController is pushed - (void)viewWillAppear:(BOOL)animated { [self.locationManager startRangingBeaconsInRegion:self.beaconRegion]; }</p> <p>NOTE: If you want to close the viewController automatically based on a region change, you'll have the problem of rapid push and pull: you'll push a viewController and then it will quickly close, open, close....the problem isn't the code, it's that the Apple API can't always make up its mind what region it's in.</p> <p>POSSIBLE SOLUTION? The "hack" might be to add a counter: what we've found is that you'll hold your phone close to a beacon and it will quickly toggle between near/immediate even though you are NOT moving your phone and the beacon signal isn't actually changing. It's an Apple "bug"! But it will only do this once or twice.</p> <p>One option is to add a counter: the equivalent of "only if you've detected a region change three or four times should you trigger the event"</p> <p>The other option is to add a time: "only trigger an event based on a region change if its been 4 seconds that the region has changed"</p> <p>Again - the problem isn't that you'll get sudden toggles (pushing a VC or pulling it off the stack) because you're 'between zones' - the problem is:</p> <p>A. Apple API can't always properly tell whether you're immediate/near/far and will suddenly change its mind</p> <p>B. Apple will sometimes shut off location services seemingly randomly and for less than a second, forcing your app to re-enter a region and start ranging again.</p>

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