Estimote SDK: Building a beacon iOS app ---- 3/3

since: 2016/07/30
update: 2016/07/30
reference:
1. Beacon Tech Overview - Estimote Developer

Part 3: Ranging beacons

A. 開啟 ViewController.swift 修改如下:
import UIKit

//@update ################################
// 1. Add the ESTBeaconManagerDelegate protocol
//class ViewController: UIViewController {
class ViewController: UIViewController, ESTBeaconManagerDelegate {
   
    //@add ################################
    // Add the property holding the data.
    // TODO: replace "<major>:<minor>" strings to match your own beacons
    let placesByBeacons = [
        "0:5": [
            "Heavenly Sandwiches": 50, // read as: it's 50 meters from
            // "Heavenly Sandwiches" to the beacon with
            // major 0 and minor 5
            "Green & Green Salads": 150,
            "Mini Panini": 325
        ],
        "0:7": [
            "Heavenly Sandwiches": 250,
            "Green & Green Salads": 100,
            "Mini Panini": 20
        ]
    ]

    //@add ################################
    // 2. Add the beacon manager and the beacon region
    let beaconManager = ESTBeaconManager()
    let beaconRegion = CLBeaconRegion(
        proximityUUID: NSUUID(UUIDString: "FDA50693-A4E2-4FB1-AFCF-C6EB07647825")!,
        identifier: "ranged region")
   
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
       
        //@add ################################
        // 3. Set the beacon manager's delegate
        self.beaconManager.delegate = self
       
        //@add ################################
        // 4. We need to request this authorization for every beacon manager
        // self.beaconManager.requestAlwaysAuthorization()
        self.beaconManager.requestWhenInUseAuthorization()
    }

    //@add ################################
    // start ranging as the view controller appears on screen
    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        self.beaconManager.startRangingBeaconsInRegion(self.beaconRegion)
    }
   
    //@add ################################
    // stop ranging as the view controller disappears on screen
    override func viewDidDisappear(animated: Bool) {
        super.viewDidDisappear(animated)
        self.beaconManager.stopRangingBeaconsInRegion(self.beaconRegion)
    }
   
    //@add ################################
    // places Near Beacon
    func placesNearBeacon(beacon: CLBeacon) -> [String]? {
        let beaconKey = "\(beacon.major):\(beacon.minor)"
        if let places = self.placesByBeacons[beaconKey] {
            //let sortedPlaces = Array(places).sorted { $0.1 < $1.1 }.map { $0.0 }
            let sortedPlaces = Array(places).sort { $0.1 < $1.1 }.map { $0.0 }
            return sortedPlaces
        }
        return nil
    }
   
    //@add ################################
    // didRangeBeacons delegate
    func beaconManager(manager: AnyObject, didRangeBeacons beacons: [CLBeacon],
                       inRegion region: CLBeaconRegion) {
        if let nearestBeacon = beacons.first, places = placesNearBeacon(nearestBeacon) {
            // TODO: update the UI here
            print("************************")
            print("UUID:" + region.proximityUUID.UUIDString + "; identifier: " + region.identifier)
            print("major: " + nearestBeacon.major.stringValue + "; minor: " + nearestBeacon.minor.stringValue)
           
            print(places) // TODO: remove after implementing the UI
            print("")
        }
    }
   
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

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B. 結果: