Question

我有一个带有MapKit View的UIViewController，该应用程序可以在模拟器和连接到我的Mac的物理设备上完美运行，但是当我尝试在断开设备连接的情况下运行该应用程序时，转到MapKit View时会崩溃

我试图使MapKit View成为初始View Controller 我试图重置手机我试图重置Xcode

import UIKit
import ChameleonFramework
class PanicMapViewController: UIViewController {

    override func viewDidLoad() {
    super.viewDidLoad()
    view.backgroundColor = FlatYellowDark()
    configureNavigationBar()
}

func configureNavigationBar() {
    navigationController?.navigationBar.barTintColor = FlatYellowDark()
    navigationController?.navigationBar.barStyle = .black
    navigationController?.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor:ContrastColorOf(FlatYellowDark(),returnFlat: true)]
    navigationItem.title = "Side Menu"

}

}

我希望当物理设备断开连接时，我可以运行该应用程序并查看MapKit视图。

Answer 1

您需要

import MapKit

在PanicMapViewController内

Answer 2

我遇到了同样的问题。即使在输入import MapKit之后。

我做了一些研究，发现设备无法找到当前位置。

import UIKit
import MapKit


Class PSSearchVC: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate  {

@IBOutlet var mapview: MKMapView!

let locationmanager = CLLocationManager()

override func viewDidLoad() {
    super.viewDidLoad()

     mapview.mapType = MKMapType.standard

    let location = CLLocationCoordinate2DMake(22.4651, 70.0771)

    let span = MKCoordinateSpan.init(latitudeDelta: 0.01, longitudeDelta:
    0.01)
    let coordinate = CLLocationCoordinate2D.init(latitude: 21.282778, longitude: -157.829444) // provide you lat and long
    let region = MKCoordinateRegion.init(center: coordinate, span: span)
    mapview.setRegion(region, animated: true)

    let annonation = MKPointAnnotation()
    annonation.coordinate = location
    annonation.title = "Chandi Bazar"
    annonation.subtitle = "Jamnagar"
    //
    mapview.addAnnotation(annonation)

    self.locationmanager.requestWhenInUseAuthorization()

    if CLLocationManager.locationServicesEnabled()
    {
        locationmanager.delegate = self
        locationmanager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
        locationmanager.startUpdatingLocation()
    }


}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
    let locValue:CLLocationCoordinate2D = manager.location!.coordinate
    print("locations = \(locValue.latitude) \(locValue.longitude)")

    locationmanager.stopUpdatingLocation()
}

}

Answer 3

我遇到了这个问题（用于iOS 12.4的Xcode 11构建），在寻找解决方案时偶然发现了这个问题。

对我来说，我通过在项目文件的“签名和功能”标签下将“地图”添加为“功能”来解决了这个问题。

为什么在与计算机iPhone断开连接的情况下加载MapKit视图时我的应用程序崩溃？

3 个答案: