locationManager 未被识别为类变量

Posted 2023-04-14

【中文标题】locationManager 未被识别为类变量

【英文标题】：locationManager not being recognized as a class variable

【发布时间】：2017-01-19 05:21:53

【问题描述】：

我正在尝试实现 locationManager 方法，而 let locationManager = CLLocation() 变量在代码中的任何地方都没有被识别。当我添加 didUpdateLocations 和 didFailWithError 方法时，错误出现了。我试图在视图加载时从用户那里获取当前位置。如果没有上面提到的方法，应用程序会在 centerMapOnLocation 方法上中断。

这是我的代码：

import Foundation
import UIKit
import Firebase
import FirebaseDatabase
import CoreLocation
import MapKit

class MainViewController: UIViewController, CLLocationManagerDelegate

    var ref: FIRDatabaseReference!
    var refHandle: UInt!
    let locationManager: CLLocationManager = CLLocationManager()
    let regionRadius: CLLocationDistance = 1000
    var currentLocation: CLLocation!
    let geoCoder = CLGeocoder()
    var placemark: CLPlacemark?



    @IBOutlet weak var mapView: MKMapView!
    @IBOutlet weak var userEmailLabel: UILabel!
    @IBOutlet weak var pickUpAddress: UITextField!

    override func viewDidLoad() 
        ref = FIRDatabase.database().reference()


        ////
        locationManager.delegate = self
        locationManager.requestLocation()
        print(locationManager.requestLocation())
        ////



        ////
        refHandle = ref.observeEventType(FIRDataEventType.Value, withBlock:  (snapshot) in
            let dataDict = snapshot.value as! [String: AnyObject]

            print((dataDict))
        )
        let userID: String = FIRAuth.auth()!.currentUser!.uid
        ref.child("users").child(userID).observeSingleEventOfType(.Value, withBlock:  (snapshot) in
        let userEmail = snapshot.value!["email"] as! String
        self.userEmailLabel.text = userEmail
        )
        ////



        ////
        centerMapOnLocation()
        super.viewDidLoad()
        ////
    

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
        print("locations: \(locations)")
    

    func locationManager(manager: CLLocationManager, didFailWithError error: NSError) 
        print("error: \(error)")
    


    func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) 
        if status != CLAuthorizationStatus.Denied
            locationManager.startUpdatingLocation()
    




    func centerMapOnLocation() 
        currentLocation = CLLocation.init(latitude: (locationManager.location?.coordinate.latitude)!, longitude: (locationManager.location?.coordinate.longitude)!)
        let coordinateRegion = MKCoordinateRegionMakeWithDistance(locationManager.location!.coordinate, regionRadius * 2.0, regionRadius * 2.0)
        mapView.setRegion(coordinateRegion, animated: true)
    


    func translateLocation() 
        geoCoder.reverseGeocodeLocation(currentLocation, completionHandler:  placemarks, error in
            if error == nil && placemarks!.count > 0 
            self.placemark = placemarks![0] as CLPlacemark
                self.pickUpAddress.text = self.stringFromPlacemark(self.placemark!)
            
        )
    

    func stringFromPlacemark(placemark: CLPlacemark) -> String  // 1

        var line1 = ""

        if let s = placemark.subThoroughfare 
            line1 += s + " "
        

        if let s = placemark.thoroughfare 
            line1 += s
        
        var line2 = ""

        if let s = placemark.locality 
            line2 += s + " "
        

        if let s = placemark.administrativeArea 
            line2 += s + " "
        

        if let s = placemark.postalCode 
            line2 += s 
        return line1 + "\n" + line2
    

    @IBAction func pickCurrentLocation(sender: AnyObject) 
       translateLocation()
    

    @IBAction func signOutButton(sender: AnyObject) 
        try! FIRAuth.auth()!.signOut()
        if let storyboard = self.storyboard 
            let viewController = storyboard.instantiateViewControllerWithIdentifier("LoginViewController")
            self.presentViewController(viewController, animated: false, completion: nil)
        
    

一段时间后我还没有找到答案。帮助将不胜感激。

谢谢。

【问题讨论】：

与您的原始问题无关，但您是否有充分的理由在实施结束时而不是在开始时调用super.viewDidLoad()？

【参考方案1】：

删除第 75 行某处的***右大括号，一切都会好起来的，它为我构建，问题是将这些函数视为全局函数。