Unable to retrieve CarrierName

问题

Using iPhone6, Xcode 8.1, running iOS 10.1.1, executing the following Swift code I keep getting

Unable to retrieve CarrierName

Error message appears before my first ViewController even loads. I searched for solutions to similar (but not same) CarrierName issues. Most of them recommend to import CoreTelephony. I Added the import of CoreTelephony but i still get the same error. Below is the code snippet that shows viewDidLoad followed by the console output. Any insights into this error?

//  ViewController.swift
//  MapLocator

import UIKit
import MapKit
import CoreLocation
import CoreTelephony


class ViewController: UIViewController, UISearchBarDelegate, MKMapViewDelegate,UINavigationControllerDelegate {
    var searchController:UISearchController!
    var annotation:MKAnnotation!
    var localSearchRequest1:MKLocalSearchRequest!
    var localSearchRequest2:MKLocalSearchRequest!
    var localSearch1:MKLocalSearch!
    var localSearch2:MKLocalSearch!
    var localSearchResponse1:MKLocalSearchResponse!
    var localSearchResponse2:MKLocalSearchResponse!
    var error:NSError!
    var pointAnnotation:MKPointAnnotation!
    var pinAnnotationView:MKPinAnnotationView!
    var placeMark1:MKPlacemark!
    var myRoute : MKRoute?
    var coord1 : CLLocationCoordinate2D!
    var coord2 : CLLocationCoordinate2D!
    //    var newPt : MKMapPoint!

    //    var lineArrayPtr = [MKMapPoint]()
    var lineArrayPtr:UnsafeMutablePointer<MKMapPoint>? = nil
    var pointIndex : Int = 0

    var lp1 : MKMapPoint!
    var lp2 : MKMapPoint!
    var lp3 : MKMapPoint!
    var lp4 : MKMapPoint!

    var searchButtonClicked = 0
    var buttonTouchCount : Double = 0
    let tapsPerMeter : Double = 2
    var pointsPerMeter : Double!
    var tapDistance : Double!

    //**************
    override func viewDidLoad() {
        super.viewDidLoad()
        mapView.delegate = self
        print("Entered viewDidLoad")

        let latitude_x: Double = 42.755139
        let longitude_x: Double = -71.584

        // Init the zoom level
        let coordinate:CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: latitude_x, longitude: longitude_x)
        //let span = MKCoordinateSpanMake(100, 80)
        let span = MKCoordinateSpanMake(0.01, 0.01)
        let region = MKCoordinateRegionMake(coordinate, span)
        self.mapView.setRegion(region, animated: true)
        print("mapView region set")

    }

********************* Console Output *********************** 2016-11-19 22:02:14.442048 MapLocator 3 Match[289:23903] [LogMessageLogging] 6.1 Unable to retrieve CarrierName. CTError: domain-2, code-5, errStr:((os/kern) failure)

Entered viewDidLoad

mapView region set

回答1:

Tray adding CoreTelephony to the AppDelegate maybe? You ViewController implementation is not accessing any CoreTelephony framework methods, thus your problem lies elsewhere.

回答2:

On my iOS device this happens because Settings->Privacy->Location Settings<(app name)->Allow Location Settings isn't set to either "Never" or "While Using the App". Once I set it - it works.

回答3:

As a solution to a different issue I did the following. Whether this fixes it or just suppresses the msg I don't know, as I was getting the msg but it was never crashing my app.

In Xcode

Click on your active scheme name right next to the Stop button
Click on Edit Scheme....
in Run (Debug) select the Arguments tab
in Environment Variables click +
add variable: OS_ACTIVITY_MODE = disable

credit here : https://stackoverflow.com/a/40160779

回答4:

Maybe this is a litle dumb but check that XCode Maps capabilities is active :) .

来源：https://stackoverflow.com/questions/40700797/unable-to-retrieve-carriername

标签

ios

xcode8.1