IOS __connection_block_invoke_2 Swift 2.0 xCode 7.1 El Capitan 10.1

Question

在装有 El Capitan 10.1 的 MBR 上的 IOS 9.1 上运行 Xcode 7.1。编写了这段看似运行但随后并未更新的简单代码，并注意到了此错误消息；是无声的崩溃吗？

"error in __connection_block_invoke_2: Connection interrupted"

不清楚我该如何推进？在最初获得正确的排序值后，CLLocation 似乎没有 self 更新。是否与上述消息有关？

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

@IBOutlet weak var Latitude: UILabel!
@IBOutlet weak var Longitude: UILabel!
@IBOutlet weak var HorizontalAccuracy: UILabel!
@IBOutlet weak var CurrentAlltitude: UILabel!
@IBOutlet weak var VerticalAccuracy: UILabel!
@IBOutlet weak var Distance: UILabel!

var locationManager: CLLocationManager = CLLocationManager()
var startLocation: CLLocation!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()
    locationManager.startUpdatingLocation()
    startLocation = nil

}

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let latestLocation: AnyObject = locations[locations.count - 1]

    Latitude.text = String(format: "%.6f",
        latestLocation.coordinate.latitude)
    Longitude.text = String(format: "%.6f",
        latestLocation.coordinate.longitude)
    HorizontalAccuracy.text = String(format: "%.4f",
        latestLocation.horizontalAccuracy)
    CurrentAlltitude.text = String(format: "%.4f",
        latestLocation.altitude)
    VerticalAccuracy.text = String(format: "%.4f",
        latestLocation.verticalAccuracy)


    if startLocation == nil {
        startLocation = latestLocation as! CLLocation
    }

    let distanceBetween: CLLocationDistance =
    latestLocation.distanceFromLocation(startLocation)

    Distance.text = String(format: "%.2f", distanceBetween)
}

func locationManager(manager: CLLocationManager,
    didFailWithError error: NSError) {

}

@IBAction func ResetDistance(sender: AnyObject) {
    startLocation = nil
}

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

如果我带着 iPad 走来走去，似乎不会更新我的位置？

Answer 1

发表评论；仔细检查，发现我的目标是 8.1；在装有 9.1 的 iPad 上运行。更改它，现在可以使用了!!

仍然收到奇怪的错误信息；但似乎并没有阻止它正常工作!!