swift – 错误：’Delegate必须响应locationManager：didUpdateLocations：’收集用户位置时

概述所以我想在用户点击按钮时收集用户位置,并稍后在我的应用中使用该位置.使用我当前的实现,当点击按钮时,应该提示用户允许共享位置,然后他们应该登录到应用程序(如果您想知道的话,通过Firebase匿名),并且应该打印用户位置信息到控制台.提示有效,但是在按下允许位置按钮后,我的应用程序因未捕获的异常’NSInternalInconsistencyException’而终止 原因是’委托必须响应loca 所以我想在用户点击按钮时收集用户位置,并稍后在我的应用中使用该位置.使用我当前的实现,当点击按钮时,应该提示用户允许共享位置,然后他们应该登录到应用程序(如果您想知道的话,通过Firebase匿名),并且应该打印用户位置信息到控制台.提示有效,但是在按下允许位置按钮后,我的应用程序因未捕获的异常’NSInternalinconsistencyException’而终止

原因是’委托必须响应locationManager：dIDUpdateLocations：’

这很奇怪,因为我的代码中有一个dIDUpdateLocations：函数.

我不知道发生了什么,任何帮助表示赞赏.我的VIEwController代码如下,谢谢！

/** copyright (c) 2016 Ahad Sheriff**/import UIKitimport Firebaseimport CoreLocationclass LoginVIEwController: UIVIEwController {    // MARK: PropertIEs    var ref: FIRDatabaseReference! // 1    var userID: String = ""    var locationManager = CLLocationManager()    overrIDe func vIEwDIDLoad() {        super.vIEwDIDLoad()        ref = FIRDatabase.database().reference() // 2    }    @IBAction func loginDIDtouch(sender: AnyObject) {        //ask user to enable location services        locationManager.requestWhenInUseAuthorization()        if CLLocationManager.locationServicesEnabled() {            //collect user's location            locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers            locationManager.requestLocation()            locationManager.startUpdatingLocation()            let location = self.locationManager.location            var latitude: Double = location!.coordinate.latitude            var longitude: Double = location!.coordinate.longitude            print("current latitude :: \(latitude)")            print("current longitude :: \(longitude)")            //Log in to application anonymously using Firebase            FIRAuth.auth()?.signInAnonymouslyWithCompletion() { (user,error) in                if let user = user {                    print("User is signed in with uID: ",user.uID)                    self.userID = user.uID                } else {                    print("No user is signed in.")                }                self.performSegueWithIDentifIEr("Logintochat",sender: nil)            }        }        else {            print("Unable to determine location")        }    }    overrIDe func prepareForSegue(segue: UIStoryboardSegue,sender: AnyObject?) {        super.prepareForSegue(segue,sender: sender)        let navVc = segue.destinationVIEwController as! UINavigationController // 1        let chatVc = navVc.vIEwControllers.first as! ChatVIEwController // 2        chatVc.senderID = userID // 3        chatVc.senderdisplayname = "" // 4    }    func locationManager(manager: CLLocationManager!,dIDUpdateLocations locations: [AnyObject]!)    {        //--- CLGeocode to get address of current location ---//        CLGeocoder().reverseGeocodeLocation(manager.location!,completionHandler: {(placemarks,error)->VoID in            if (error != nil)            {                print("Reverse geocoder Failed with error" + error!.localizedDescription)                return            }            if placemarks!.count > 0            {                let pm = placemarks![0] as CLPlacemark                self.displayLocationInfo(pm)            }            else            {                print("Problem with the data received from geocoder")            }        })    }    func displayLocationInfo(placemark: CLPlacemark?)    {        if let containsPlacemark = placemark        {            //stop updating location            locationManager.stopUpdatingLocation()            let locality = (containsPlacemark.locality != nil) ? containsPlacemark.locality : ""            let postalCode = (containsPlacemark.postalCode != nil) ? containsPlacemark.postalCode : ""            let administrativeArea = (containsPlacemark.administrativeArea != nil) ? containsPlacemark.administrativeArea : ""            let country = (containsPlacemark.country != nil) ? containsPlacemark.country : ""            print(locality)            print(postalCode)            print(administrativeArea)            print(country)        }    }    func locationManager(manager: CLLocationManager!,dIDFailWithError error: NSError!) {        print("Error while updating location " + error.localizedDescription)    }}

解决方法 首先,明确添加您确认CLLocationManagerDelegate：

class LoginVIEwController: UIVIEwController,CLLocationManagerDelegate

其次,为CLLocationManager设置委托属性：

overrIDe func vIEwDIDLoad() {    super.vIEwDIDLoad()    locationManager.delegate = self    ref = FIRDatabase.database().reference()}

第三,在CLLocationManagerDelegate doc中,我看到了与dIDUpdateLocations和dIDFailWithError方法的声明不同：

func locationManager(_ manager: CLLocationManager,dIDUpdateLocations locations: [CLLocation])func locationManager(_ manager: CLLocationManager,dIDFailWithError error: NSError)

此外,您在代码中几乎没有其他问题.它们都是关于不安全的展开.你不应该使用不安全的展开！到处.这样做是为了杀死选择哲学.另一方面,做正确的事情可以大大提高应用的稳定性.在loginDIDtouch函数中进行以下更正：

var latitude: Double? = location?.coordinate.latitudevar longitude: Double? = location?.coordinate.longitude

当您第一次调用此函数时,您的位置尚未确定(将以异步方式确定,您将获得委托方法中的位置),这就是使用force unwrapp时出现致命错误的原因.在dIDUpdateLocations函数中：

if let pm = placemarks?.first{    self.displayLocationInfo(pm)  }

这部分代码的更正比原始代码短,并且可以防止您同时发生两次可能的崩溃 – 当地标为nil且地标不是nil时,则为空数组

总结

以上是内存溢出为你收集整理的swift – 错误：’Delegate必须响应locationManager：didUpdateLocations：’收集用户位置时全部内容，希望文章能够帮你解决swift – 错误：’Delegate必须响应locationManager：didUpdateLocations：’收集用户位置时所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。