ios - SWIFT 线程 1 : EXC Bad instruction XCODE IOS

Question

我是 stackexchange 的新手，所以如果我需要提供更多信息，请告诉我。

我尝试安装 Corelocation 和 Mapkit 并一起使用它们。自从我遵循 Vea 软件教程以来，我一直收到以下错误:

Thread 1: EXC_BAD_INSTRUCTION(code=EXC_1386_INVOP,subcode=0x0)

在编译器中它说

fatal error: Unexpectedly found nil while unwrapping an Optional Value(llDB)

错误出现在这一行，但是当我删除它时，它出现在另一个 Mapkit/Location 核心行。错误:

self.mapView.showsUserLocation = true

编辑:当我删除上面的行时，同样的错误出现在

 self.mapView.setRegion(region, animated: true)

我在互联网上搜索了一段时间，但没有任何帮助。感谢您的宝贵时间。

如果您需要整个 View Controller 代码。在这里。

import UIKit
import Parse
import CoreLocation
import MapKit  


class ViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate {

    @IBOutlet weak var mapView: MKMapView!

    let locationManager = CLLocationManager()


    @IBOutlet var UsernameTextField: UITextField!
    @IBOutlet var PasswordTF: UITextField!
    @IBOutlet var EmailTF: UITextField!



    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

    self.locationManager.delegate = self

    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest

    self.locationManager.requestWhenInUseAuthorization()

    self.locationManager.startUpdatingLocation()

    self.mapView.showsUserLocation = true

    }






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


    // MARK: - Location Delegate Methods

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
       let location = locations.last

        let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude)

        let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 1, longitudeDelta: 1))

        self.mapView.setRegion(region, animated: true)

        self.locationManager.stopUpdatingLocation()
    }

    func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
        print("Error:" + error.localizedDescription)
    }

}

Answer 1

这只是我注意到你使用的假设

self.mapView.setRegion(区域, 动画: true)

在 CLLocationManager 委托(delegate)中并在 mapView 实际显示之前开始更新(即在 viewDidLoad 中)。

会不会是 mapView 在安装到 View 层次结构之前尝试更新其视觉状态？