Swift Beacon不';现在使用Swift 3.0无法工作

Swift Beacon不';现在使用Swift 3.0无法工作,swift,swift3,ibeacon,beacon,Swift,Swift3,Ibeacon,Beacon,我一直遵循使用Swift创建信标接近应用程序的指南,但自从更新Xcode并将代码更新为Swift 3.0后,我遇到了一个致命错误 浏览这些函数时,我认为startScanning函数有问题,当它启动时,我会收到致命的错误消息 如果您能提供任何有帮助的提示,我们将不胜感激: import UIKit import CoreLocation class ViewController: UIViewController, CLLocationManagerDelegate { @IBOutlet w

我一直遵循使用Swift创建信标接近应用程序的指南,但自从更新Xcode并将代码更新为Swift 3.0后,我遇到了一个致命错误

浏览这些函数时,我认为startScanning函数有问题,当它启动时,我会收到致命的错误消息

如果您能提供任何有帮助的提示,我们将不胜感激:

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {
@IBOutlet weak var distanceLabel: UILabel!
var locationManager: CLLocationManager!

override func viewDidLoad() {
    super.viewDidLoad()

    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.requestAlwaysAuthorization()

    view.backgroundColor = UIColor.gray
    print("did load")

}


func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
    if status == CLAuthorizationStatus.authorizedAlways{
        print("status authorized")
        if CLLocationManager.isMonitoringAvailable(for: CLBeaconRegion.self){
            print("is monitoring")
            if CLLocationManager.isRangingAvailable() {
                print("scanning")
                startScanning()

            }
        }
    }
}




func startScanning() {
    print("start Scanning")
    let uuid = NSUUID(uuidString: "695e5f08824c785cadc72e1dde23be04")
    let beaconRegion = CLBeaconRegion(proximityUUID: uuid as! UUID, identifier: "MyBeacon")

    locationManager.startMonitoring(for: beaconRegion)
    locationManager.startRangingBeacons(in: beaconRegion)
}



func updateDistance(distance: CLProximity){

    UIView.animate(withDuration: 1) { [unowned self] in

        switch distance {
        case .unknown:
            self.view.backgroundColor = UIColor.gray
            self.distanceLabel.text = "UNKNOWN"
            print("distance Unknown")
        case .far:
            self.view.backgroundColor = UIColor.blue
            self.distanceLabel.text = "FAR"
            print("distance Far")
        case .near:
            self.view.backgroundColor = UIColor.orange
            self.distanceLabel.text = "NEAR"
            print("distance Near")
        case .immediate:
            self.view.backgroundColor = UIColor.red
            self.distanceLabel.text = "BOOM!"
            print("distance Immediate")
        }
    }
}



func locationManager(_ manager: CLLocationManager, didRangeBeacons beacons: [CLBeacon], in region: CLBeaconRegion) {
    if beacons.count > 0 {
        let beacon = beacons.first! as CLBeacon
        updateDistance(distance: beacon.proximity)
        print("found more than one beacon")
    } else {
        updateDistance(distance: .unknown)
        print("found only one beacon")
    }
}



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


}

问题是您的UUID格式错误,因此此行无法解析它,将nil分配给变量
UUID

let uuid = NSUUID(uuidString: "695e5f08824c785cadc72e1dde23be04")
然后,程序将使用
uuid作为崩溃!UUID
操作,因为!如果存在nil值,则将崩溃

要解决此问题,需要在UUID字符串中的适当位置添加破折号。您还应该避免使用!运算符强制展开Swift中的可选变量,因为它可能导致这样的崩溃。试试这个:

if let uuid = NSUUID(uuidString: "695e5f08-824c-785c-adc7-2e1dde23be04") {
  let beaconRegion = CLBeaconRegion(proximityUUID: uuid, identifier: "MyBeacon")
  locationManager.startMonitoring(for: beaconRegion)
  locationManager.startRangingBeacons(in: beaconRegion)
}
else {
  NSLog("Invalid UUID format")
}

运行时,检查代码是否没有进入“无效UUID格式”路径。

问题是您的UUID格式错误,因此此行无法解析它,将nil分配给变量
UUID

let uuid = NSUUID(uuidString: "695e5f08824c785cadc72e1dde23be04")
然后,程序将使用
uuid作为崩溃!UUID
操作,因为!如果存在nil值,则将崩溃

要解决此问题,需要在UUID字符串中的适当位置添加破折号。您还应该避免使用!运算符强制展开Swift中的可选变量,因为它可能导致这样的崩溃。试试这个:

if let uuid = NSUUID(uuidString: "695e5f08-824c-785c-adc7-2e1dde23be04") {
  let beaconRegion = CLBeaconRegion(proximityUUID: uuid, identifier: "MyBeacon")
  locationManager.startMonitoring(for: beaconRegion)
  locationManager.startRangingBeacons(in: beaconRegion)
}
else {
  NSLog("Invalid UUID format")
}

运行时,检查代码是否未进入“无效UUID格式”路径。

错误消息是什么?致命错误:在展开可选值2016-09-27 17:27:35.045701 Prject 22[3211:825691]时意外发现零致命错误:在展开可选值时意外发现零错误消息是什么?致命错误:在展开可选值时意外发现零2016-09-27 17:27:35.045701项目22[3211:825691]致命错误:在展开可选值时意外发现零谢谢!这解决了startScanning基金的问题,但现在locationManager基金出现了问题,但我会看看自己能做些什么。再次感谢谢谢你!这解决了startScanning基金的问题,但现在locationManager基金出现了问题,但我会看看自己能做些什么。再次感谢