Swift2.3 code for Beacon detection

Question

We are in advanced stages of developing a Swift2.2 app and hence have decided to migrate to 2.3 in the interim and do the full Swift 3 migration later. However we are unable

Answer 1

Try constructing your location manager after the view loads. In other words, change:

let locationManager = CLLocationManager()

to

let locationManager : CLLocationManager!

And then add this to the viewDidLoad:

locationManager = CLLocationManager()

I have seen strange behavior with LocationManager constructed on initialization of a UIViewController.

Answer 2

While I was testing beacon ranging, I downloaded multiple applications that I forgot to uninstall. After I uninstalled all beacon-related applications and re-installed just the needed applications, I was able to get ranging beacons to work.

Answer 3

There are a number of anecdotal reports of beacon detection problems on iOS 10. Symptoms include:

• Improper region exit events, especially when the app is in the background, followed by entry events if the shoulder button is pressed.
• Periodic dropouts in detections of ranged beacons, with callbacks providing an empty beacon list when beacons are in the vicinity.
• Ranged beacon callbacks return proper results when a different beacon ranging or detection app is running that targets iOS 9.x.

This is presumably a bug that will be fixed in an iOS update. Until then, some users have reported that setting the app deployment target in XCode to 9.x will resolve the issue.