Swift3.0を使って簡単なiPhoneアプリを作ってみます
初心者向け）Swift3.0で簡単なiPhoneアプリを作ってみるで作ったシンプルなSwift3.0アプリでビーコンを検出してみます

#1. ビーコンを用意します

ビーコンを用意し、UUID、major、minor値を確認します
手近にビーコンがない場合、iPhoneやMacbookをビーコンにすることができます
Macbookからビーコンを発信する方法→SwiftとiBeaconを使ってお母さんが自分の部屋に近づいて来た事を警告するアプリをつくる
iPhoneからビーコンを発信する方法→手軽にビーコンの動作を体験できる「Beacon入門」アプリが登場！

#2. アプリを用意します

ビーコンを受信するアプリを作成します
XcodeでSwiftアプリを用意します
ViewController.swiftに下記のコードをコピペします

スタンプラリーサンプルアプリ

//
//  ViewController.swift
//  beaconappc
//
//  Created by Tohru Suzuki on 2017/06/22.
//  Copyright © 2017年 Tohru Suzuki. All rights reserved.
//

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {
    
    var myLocationManager:CLLocationManager!
    var myBeaconRegion:CLBeaconRegion!
    var beaconUuids: NSMutableArray!
    var beaconDetails: NSMutableArray!
    
    let label_state = UILabel()
    let button_found = UIButton()
    let label_score = UILabel()
    let button_reset = UIButton()
    
    let UUIDList = [
        "AAAAAAAA-AAAA-AAAA-AAAA-AAAAAAAAAAAA",
        "BBBBBBBB-BBBB-BBBB-BBBB-BBBBBBBBBBBB"
    ]
    override func viewDidLoad() {
        super.viewDidLoad()
        myLocationManager = CLLocationManager()
        myLocationManager.delegate = self
        myLocationManager.desiredAccuracy = kCLLocationAccuracyBest
        myLocationManager.distanceFilter = 1
        let status = CLLocationManager.authorizationStatus()
        print("CLAuthorizedStatus: \(status.rawValue)");
        if(status == .notDetermined) {
            myLocationManager.requestAlwaysAuthorization()
        }
        beaconUuids = NSMutableArray()
        beaconDetails = NSMutableArray()
        
        self.view.backgroundColor = UIColor.init(red:0.8, green: 0.84, blue: 1, alpha: 1)
        let screenWidth:CGFloat = self.view.frame.width
        let screenHeight:CGFloat = self.view.frame.height

        label_state.frame = CGRect(x:screenWidth/12, y:120, width:screenWidth*11/12, height:50);
        label_state.text = ""
        label_state.textAlignment = NSTextAlignment.center
        label_state.font = UIFont.systemFont(ofSize: 30)
        self.view.addSubview(label_state)

        button_found.frame = CGRect(x:screenWidth/4, y:200, width:screenWidth/2, height:50)
        //button_found.frame = CGRect(x:screenWidth/4, y:screenHeight/2, width:screenWidth/2, height:70)
        button_found.setTitle("発見！", for:UIControlState.normal)
        button_found.titleLabel?.font =  UIFont.systemFont(ofSize: 30)
        button_found.backgroundColor = UIColor.init(red:0.9, green: 0.9, blue: 0.9, alpha: 1)
        button_found.addTarget(self, action: #selector(ViewController.buttonTapped(sender:)), for: .touchUpInside)
        self.view.addSubview(button_found)

        label_score.frame = CGRect(x:screenWidth/12, y:280, width:screenWidth*11/12, height:50);
        label_score.text = ""
        label_score.textAlignment = NSTextAlignment.center
        label_score.font = UIFont.systemFont(ofSize: 30)
        self.view.addSubview(label_score)

        button_reset.frame = CGRect(x:screenWidth/4, y:360, width:screenWidth/2, height:50)
        //button_reset.frame = CGRect(x:screenWidth/4, y:screenHeight/2, width:screenWidth/2, height:50)
        button_reset.setTitle("リセット", for:UIControlState.normal)
        button_reset.titleLabel?.font =  UIFont.systemFont(ofSize: 30)
        button_reset.backgroundColor = UIColor.init(red:0.9, green: 0.9, blue: 0.9, alpha: 1)
        button_reset.addTarget(self, action: #selector(ViewController.buttonTappedReset(sender:)), for: .touchUpInside)
        self.view.addSubview(button_reset)
    }
    
    internal func buttonTapped(sender : AnyObject) {
        if (label_state.text == "すぐそばです！！") {
            label_score.text = "ポイントげっと！"
        }
    }
    
    internal func buttonTappedReset(sender : AnyObject) {
        label_score.text = ""
    }

    private func startMyMonitoring() {
        for i in 0 ..< UUIDList.count {
            let uuid: NSUUID! = NSUUID(uuidString: "\(UUIDList[i].lowercased())")
            let identifierStr: String = "abcde\(i)"
            myBeaconRegion = CLBeaconRegion(proximityUUID: uuid as UUID, identifier: identifierStr)
            myBeaconRegion.notifyEntryStateOnDisplay = false
            myBeaconRegion.notifyOnEntry = true
            myBeaconRegion.notifyOnExit = true
            myLocationManager.startMonitoring(for: myBeaconRegion)
        }
    }
    
    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        print("didChangeAuthorizationStatus");
        switch (status) {
        case .notDetermined:
            print("not determined")
            break
        case .restricted:
            print("restricted")
            break
        case .denied:
            print("denied")
            break
        case .authorizedAlways:
            print("authorizedAlways")
            startMyMonitoring()
            break
        case .authorizedWhenInUse:
            print("authorizedWhenInUse")
            startMyMonitoring()
            break
        }
    }
    
    func locationManager(_ manager: CLLocationManager, didStartMonitoringFor region: CLRegion) {
        manager.requestState(for: region);
    }
    
    func locationManager(_ manager: CLLocationManager, didDetermineState state: CLRegionState, for region: CLRegion) {
        switch (state) {
        case .inside:
            print("iBeacon inside");
            manager.startRangingBeacons(in: region as! CLBeaconRegion)
            break;
        case .outside:
            print("iBeacon outside")
            break;
        case .unknown:
            print("iBeacon unknown")
            break;
        }
    }
    
    func locationManager(_ manager: CLLocationManager, didRangeBeacons beacons: [CLBeacon], in region: CLBeaconRegion) {
        beaconUuids = NSMutableArray()
        beaconDetails = NSMutableArray()
        if(beacons.count > 0){
            for i in 0 ..< beacons.count {
                let beacon = beacons[i]
                let beaconUUID = beacon.proximityUUID;
                let minorID = beacon.minor;
                let majorID = beacon.major;
                let rssi = beacon.rssi;
                var proximity = ""
                switch (beacon.proximity) {
                case CLProximity.unknown :
                    print("Proximity: Unknown");
                    proximity = "不明ですー"
                    break
                case CLProximity.far:
                    print("Proximity: Far");
                    proximity = "遠いです。。"
                    break
                case CLProximity.near:
                    print("Proximity: Near");
                    proximity = "近いです！"
                    break
                case CLProximity.immediate:
                    print("Proximity: Immediate");
                    proximity = "すぐそばです！！"
                    break
                }
                beaconUuids.add(beaconUUID.uuidString)
                var myBeaconDetails = "Major: \(majorID) "
                myBeaconDetails += "Minor: \(minorID) "
                myBeaconDetails += "Proximity:\(proximity) "
                myBeaconDetails += "RSSI:\(rssi)"
                print(myBeaconDetails)
                beaconDetails.add(myBeaconDetails)
                label_state.text = proximity
            }
        }
    }
    
    func locationManager(_ manager: CLLocationManager, didEnterRegion region: CLRegion) {
        print("didEnterRegion: iBeacon found");
        manager.startRangingBeacons(in: region as! CLBeaconRegion)
    }
    
    func locationManager(_ manager: CLLocationManager, didExitRegion region: CLRegion) {
        print("didExitRegion: iBeacon lost");
        manager.stopRangingBeacons(in: region as! CLBeaconRegion)
    }
}

使用するビーコンのUUID/Major/Minorを上記のViewController.swiftのUUIDリストと置き換えます
上記のViewController.swiftのlabel1、label2、button1、button2を、用意したラベル（ｘ２）、ボタン（ｘ２）と置き換えて接続し直します
位置情報を使用可能にするため、ナビゲーターで「info.plist」を選択し、「Privacy - Location Always Usage Description」を追加します

#4. iPhoneで確認します

iPhoneにデプロイし、稼働を確認します

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