Question

我正在努力将GoogleMaps iOS SDK集成到我的项目中，并且我一直收到此错误：

'NSInternalInconsistencyException''实例0x7fea5e93e210 当键值观察者仍然存在时，类GMSMapView被释放在它注册。目前的观察信息：

这是我的视图控制器代码：

import UIKit
import GoogleMaps

class ViewController: UIViewController, CLLocationManagerDelegate, GMSMapViewDelegate {

var locationManager = CLLocationManager()

var didFindMyLocation = false

let mapView = GMSMapView()

override func viewDidLoad() {
    super.viewDidLoad()

    let mapView = GMSMapView()


    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()

    let camera: GMSCameraPosition = GMSCameraPosition.cameraWithLatitude(37.61729,longitude: -122.38229, zoom: 18)

    mapView.camera = camera

    mapView.delegate = self

    mapView.addObserver(self, forKeyPath: "myLocation", options: NSKeyValueObservingOptions.New, context: nil)
}

override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) {
    if !didFindMyLocation {
        let myLocation: CLLocation = change![NSKeyValueChangeNewKey] as! CLLocation
        mapView.camera = GMSCameraPosition.cameraWithTarget(myLocation.coordinate, zoom: 18.0)
        mapView.settings.myLocationButton = true

           didFindMyLocation = true
        }
    }

}

Answer 1

正如它所说的那样：＆＃34;关键价值观察者仍在注册＃34;这实质上是在抱怨你没有注册KVO观察员。

从这个意义上讲，KVO有点像NSNotification - 如果您在viewDidLoad:注册观察者，则需要删除观察者，例如viewDidDisappear:或{ {1}}。

在您的情况下，尝试添加dealloc功能并使用dealloc取消订阅KVO。有关KVO here的文章，请参阅mattt的文章。

Answer 2

Swift 3

deinit {
            mapView.removeObserver(self, forKeyPath: "myLocation")
}

GoogleMaps iOS SDK GMSMapView类已取消分配

2 个答案: