How can I add the beacon id?-CodePudding

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)
     }
    }

CodePudding user response：

This is my code, I can see the distance on the screen but I want to add the ID of the beacon found as well. Every time that I add something on the ContentView I have en error: not in scope.

 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)
 }
}

struct ContentView: View{

@ObservedObject var detector = BeaconDetector()

var body: some View {
    if detector.lastDistance == .immediate {
        return Text("RIGHT HERE")
        // I’m trying to add here
            .modifier(BigText())
            .background(Color.green)
            .edgesIgnoringSafeArea(.all)
        
    } else if detector.lastDistance == .near {
        return Text("NEAR")
        // I’m trying to add here

            .modifier(BigText())
            .background(Color.orange)
            .edgesIgnoringSafeArea(.all)
        
    } else if detector.lastDistance == .far {
         return Text("FAR")
        // I’m trying to add here

            .modifier(BigText())
            .background(Color.red)
            .edgesIgnoringSafeArea(.all)
        
    } else {
        return Text("UNKNOWN")
            .modifier(BigText())
            .background(Color.gray)
            .edgesIgnoringSafeArea(.all)
     }
   
   }
}

struct ContentView_Previews: PreviewProvider {
static var previews: some View {
    ContentView()
 }
}

CodePudding user response：

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 \()

EDIT: 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(())
    }