ios - swift 谷歌地图不显示

Question

在 Xcode9.2 上遵循此代码

@IBOutlet weak var mView: UIView!
let locationManager = CLLocationManager()
var mapView: GMSMapView!

var currentLatitude:Double = 0.0
var currentLongtitude:Double = 0.0
var heading = 0.00

override func viewDidLoad() {
    super.viewDidLoad()


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

    let camera = GMSCameraPosition.camera(withLatitude: locationManager.location!.coordinate.latitude, longitude:
        locationManager.location!.coordinate.longitude, zoom: 15);

    mapView = GMSMapView.map(withFrame: self.view.bounds, camera: camera)
    mapView.delegate = self
    self.mView = mapView
    mapView.settings.myLocationButton = true
    mapView.isMyLocationEnabled = true
}

如果我用

self.View = mapView

它工作得很好但是

self.mView = mapView

它不起作用，为什么？ mMapview 是白色的。

Answer 1

如果您将 mapview 放在 Storyboard或 xib 上，则可以通过使用 self.mView = mapView 对其进行分配来覆盖它。相反，应该已经有一个实例化的 self.mView，您可以将 mapView = GMSMapView.map(withFrame: self.view.bounds, camera: camera) 更改为 self.mView.camera = camera，以及 mapView 下面的所有其他实例到 self.mView。

如果没有，您可以完全删除 self.mView 并只使用 mapView。将 self.view.addSubview(mapView) 添加到您的 viewDidLoad 的底部，您将被设置。