swift - 複数の iBeacon を使用する

Question

ビーコンに最も近いときに画像を表示し、別のビーコンに移動すると別の画像を表示するビーコンに関する私のプロジェクト。if ステートメントを使用してこの問題を解決しようとしています。何をすべきかわかりません。エラーが表示されます。

func locationManager(manager: CLLocationManager, didRangeBeacons beacons: [CLBeacon], inRegion region: CLBeaconRegion) {
    if BEACON_1_UUID = BEACON_1_MAJOR {

        var closestBeacon = beacons[0]

      //  print("major = \(closestBeacon.major) minor = \(closestBeacon.minor)")

        if closestBeacon != lastFoundBeacon || lastProximity != closestBeacon.proximity {
                lastFoundBeacon = closestBeacon
                lastProximity = closestBeacon.proximity

                var  proximityMessage: String!

                switch lastFoundBeacon.proximity {

                case CLProximity.Immediate:

                    if BEACON_1_MAJOR = closestBeacon {
                        proximityMessage = "Very Close"
                        txtDesc.text = "hi"
                        imageview.image = UIImage(named: "CC_Zoe-Francois_No-Bake-Strawberry-Cheesecake.jpg");
                        self.checkIn("Leaving", comment: "Checking In")
                        self.view.backgroundColor = UIColor.redColor()
                        txtre.text! += "Very Close to \(closestBeacon.major) \(closestBeacon.minor) \n"
                    } else { /* ... */ }

                case CLProximity.Near:
                    proximityMessage = "Near"
                    // manager.stopRangingBeaconsInRegion(bRegion)
                    self.view.backgroundColor = UIColor.orangeColor()
                   txtre.text! += "Near \(closestBeacon.major) \(closestBeacon.minor) \n"

                case CLProximity.Far:
                    proximityMessage = "Far"

                    txtre.text! += "Far from \(closestBeacon.major) \(closestBeacon.minor) \n"

                    self.view.backgroundColor = UIColor.greenColor()

                    //self.checkIn("out")
                    self.sendNotification("Good Bye")

                default:
                    proximityMessage = "Where's the Beacon?"
                }
        }
    }
}