Google API 地图未显示在 TabBar 应用程序中

Question

我正在学习 Google 地图，它在 SingleView 应用程序中完美运行。但是我想改进我的应用程序并使用了标签栏菜单。我将 ViewController 与 MapView 连接到 TabBarController，然后地图加载失败，只有空白方块而不是地图。

我做错了什么？

编辑：

class ViewController: UIViewController, CLLocationManagerDelegate {

@IBOutlet weak var mapView: GMSMapView!

let locationManager = CLLocationManager()

override func viewDidLoad() {

    super.viewDidLoad()
    self.locationManager.requestWhenInUseAuthorization()
    self.locationManager.delegate = self
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
    self.locationManager.startUpdatingLocation()
    self.locationManager.startMonitoringSignificantLocationChanges()    
}

//MARK: Shows Google Map
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

    self.locationManager.stopUpdatingLocation()
    let locationArray = locations as NSArray
    let locationObj = locationArray.lastObject as! CLLocation
    let coord = locationObj.coordinate

    mapView.camera = GMSCameraPosition(target: coord, zoom: 15, bearing: 0, viewingAngle: 0)

    locationManager.stopUpdatingLocation()
}

func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {

    if status == .AuthorizedWhenInUse {

        locationManager.startUpdatingLocation()

        mapView.myLocationEnabled = true
        mapView.settings.myLocationButton = true
    }
}

Answer 1

我想我找到了问题所在，至少现在一切正常。所以我搬家了

mapView.myLocationEnabled = true
mapView.settings.myLocationButton = true

在 locationManager.stopUpdatingLocation() 之前

到 func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) 现在可以了。

但是我确实觉得我的代码很糟糕，它使用了 stopUpdatingLocation() 两次。就我而言，这是否意味着该应用程序只会在应用程序加载时获取用户位置一次？

Google API 地图未显示在 TabBar 应用程序中

Google API Maps don't show up on TabBar Application

tabbarcontroller

swift