CODEWITHSUNDEEP
iosibeacon
jason
jason

Reputation: 369

iBeacon: Unable to detect broadcaster - Intermittent

I came across this tutorial (http://www.appcoda.com/ios7-programming-ibeacons-tutorial/) about iBeacon which I found interesting. I've downloaded their source code and able to run well.

Anyway, I noticed one strange thing. There are times, when I run the broadcaster first instead of the receiver, the receiver seems to not be able to detect any beacon but if I run the receiver first, only then the beacon can be detected.

I've tried looking into other tuts but iBeacon seems like a new technology and not much reference can be found yet. Can any of you guys who had get their hands dirty into this iBeacon thing shed some light on this intermittent issue?

Your help are much appreciated.

Upvotes: 1

Views: 239

Answers (2)

James Frost
James Frost

Reputation: 6990

The issue you're seeing is because the receiver app only starts 'ranging' for beacons if it detects that you have entered a region. If you start the broadcaster first, you're already inside the beacon's region, so your app might not start ranging. This sentence in the article is the clue:

Launch the receiver app and carry it far away from the broadcasting beacon and then walk towards it to simulate entering the region.

Monitoring for a beacon means that your app will only be notified when you enter or exit a region you've defined. The radius of this region could be up to ~50m, so if you're just sat next to the receiver, you shouldn't trigger one of these events unless you turn the receiver off and on again. Monitoring can be done whilst the app is running in the background or the foreground.

Ranging for beacons in a region means that the app will be notified once per second with a list of all beacons that the device can see in the specified region (ordered by distance). Ranging will call the locationManager:didRangeBeacons:inRegion: method of your CLLocationManager's delegate. The list of beacons will be constantly updated as you move around inside / outside the region and your distance to the beacons changes. Ranging is intended to happen whilst your app is in the foreground.

If you would like the app to continuously listen for beacons, try calling

[self.locationManager startRangingBeaconsInRegion:self.beaconRegion];

in your viewDidLoad:, instead of in your didEnterRegion: method.

Upvotes: 4

rishi
rishi

Reputation: 11839

Its due to current location delegate available methods. Add this method also -

- (void)locationManager:(CLLocationManager *)manager didStartMonitoringForRegion:(CLRegion *)region {
        [self.locationManager startRangingBeaconsInRegion:self.beaconRegion];
}

This will fix the issue.

Upvotes: 1

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