How can I add the beacon id? - swift

Question

I would like to show on the screen the distance (Unknown, far, near or right here) and the ID of the found beacon. This is my code
struct ContentView: View{
#ObservedObject var detector = BeaconDetector()
var body: some View {
if detector.lastDistance == .immediate {
return Text("RIGHT HERE")
// id here
.modifier(BigText())
.background(Color.green)
.edgesIgnoringSafeArea(.all)
} else if detector.lastDistance == .near {
return Text("NEAR")
.modifier(BigText())
.background(Color.orange)
.edgesIgnoringSafeArea(.all)
} else if detector.lastDistance == .far {
return Text("FAR")
.modifier(BigText())
.background(Color.red)
.edgesIgnoringSafeArea(.all)
} else {
return Text("UNKNOWN")
.modifier(BigText())
.background(Color.gray)
.edgesIgnoringSafeArea(.all)
}
}
}
import Combine
import CoreLocation
import SwiftUI
class BeaconDetector: NSObject, ObservableObject,
CLLocationManagerDelegate{
var didChange = PassthroughSubject<Void, Never>()
var locationManager: CLLocationManager?
var beaconID = UUID().self
#Published var lastDistance = CLProximity.unknown
override init() {
super.init()
locationManager = CLLocationManager()
locationManager?.delegate = self
locationManager?.requestWhenInUseAuthorization()
}
func locationManager(_ manager: CLLocationManager,
didChangeAuthorization status: CLAuthorizationStatus) {
if status == .authorizedWhenInUse {
if CLLocationManager.isMonitoringAvailable(for:
CLBeaconRegion.self){
if CLLocationManager.isRangingAvailable(){
startScanning()
}
}
}
}
func startScanning() {
let uuid = UUID(uuidString: "D3D6736B-4C7C-412D-865B-EE61ACF88C61")!
let constraint = CLBeaconIdentityConstraint(uuid: uuid, major: 123,
minor: 456)
let beconRegion = CLBeaconRegion(beaconIdentityConstraint:
constraint, identifier: "MyBeacon")
locationManager?.startMonitoring(for: beconRegion)
locationManager?.startRangingBeacons(satisfying: constraint)
}
func locationManager(_ manager: CLLocationManager, didRange beacons:
[CLBeacon], satisfying beaconConstraint: CLBeaconIdentityConstraint) {
if let beacon = beacons.first {
update(distance: beacon.proximity)
} else {
update(distance: .unknown)
}
}
func update(distance: CLProximity) {
lastDistance = distance
didChange.send(())
}
}
struct BigText: ViewModifier {
func body(content: Content) -> some View {
content
.font(Font.system(size: 72, design: .rounded))
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 0,
maxHeight: .infinity)
}
}

Answer 1

Try something like this:
Text("Beacon with major: \(detector.lastMajor) minor: \(detector.lastMinor) is RIGHT HERE")
.modifier(BigText())
.background(Color.green)
.edgesIgnoringSafeArea(.all)
If the BeaconDetector class has a field for lastMajor and lastMinor you can reference these inside your string to be shown on the screen by escaping the expression inside the string with \\().
Since the clarified code shows that the major and minor are not fields on BeaconDetector you will need to add them like this:
#Published var lastMajor: NSNumber? = nil
#Published var lastMinor: NSNumber? = nil
And then you will need to update them when you update the proximity like this:
update(distance: beacon.proximity, major: beacon.major, minor: beacon.minor)
And add these to your update function like this:
func update(distance: CLProximity, major: NSNumber, minor: NSNumber) {
lastDistance = distance
lastMajor = major
lastMinor = minor
didChange.send(())
}