Question

我正在开发一款iOS应用，它可以覆盖一个区域内的信标。我有一个CLLocationManager委托，它定期从区域内的所有信标中获取信息。我有一个for循环，循环遍历所有找到的信标并将数据打印到控制台。

for i in 0..<knownBeacons.count{
    var uuid = knownBeacons[i].proximityUUID.description
    println(uuid)
}

但是，当我打印每个信标的UUID描述时，它会添加其他信息。例如，print语句返回：

<__NSConcreteUUID 0x1700351e0> B9407F30-F5F8-466E-AFF9-25556B57FE6D

我真正想要的只是最后一部分'B9407F30-F5F8-466E-AFF9-25556B57FE6D'，并希望删除＆lt; ＆GT;括号。谁能告诉我怎么做？或者如果我不应该使用UUID.description属性并且应该使用其他东西。感谢。

更新：为了清楚起见，我已经包含了完整的ViewController类

class ViewController: UIViewController, CLLocationManagerDelegate {

    let locationManager = CLLocationManager()
    let region = CLBeaconRegion(proximityUUID: NSUUID(UUIDString: "B9407F30-F5F8-466E-AFF9-25556B57FE6D"), identifier: "Estimotes")

    override func viewDidLoad() {
        super.viewDidLoad()

        locationManager.delegate = self;
        if(CLLocationManager.authorizationStatus() != CLAuthorizationStatus.AuthorizedWhenInUse){
            locationManager.requestWhenInUseAuthorization()
        }
        locationManager.startRangingBeaconsInRegion(region)
        locationManager.startUpdatingLocation()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func locationManager(manager: CLLocationManager!, didRangeBeacons beacons: [AnyObject]!, inRegion region: CLBeaconRegion!){
        let knownBeacons = beacons.filter{ $0.proximity != CLProximity.Unknown }
        if(knownBeacons.count > 3) {           
            for i in 0..<3{
                var uuid = knownBeacons[i].proximityUUID
                var major = knownBeacons[i].major
                var minor = knownBeacons[i].minor
                var proximity = knownBeacons[i].proximity.rawValue
                var rssi = knownBeacons[i].rssi
                var accuracy = knownBeacons[i].accuracy.description
                println(uuid)
            } 
        }
    }
}

Answer 1

var uuid = knownBeacons[i].proximityUUID!.UUIDString

信标UUID描述

1 个答案: