iOS GMSMapView 更改初始加载背景颜色

Question

我发现这个问题可能是完全相同的问题，但接受的答案对我不起作用。

我们目前正在使用 Google Maps API 加载地图以覆盖整个视图。最初的 GMSMapView 背景颜色有点像棕褐色，RGB(237, 234, 226)，至少在 xcode 的视图层次结构中，但我们的应用程序在其他地方都有黑色背景，所以在谷歌地图加载我们自定义的深色之前，我们会看到棕褐色的闪烁样式。

有谁知道如何更改初始棕褐色背景颜色？

我们正在 viewDidLoad（下面的代码）中加载我们的自定义样式，但我们假设初始背景不会受此影响。

do {
  if let styleURL = Bundle.main.url(forResource: "GoogleMapsStyle", withExtension: "json") {
    mapView.mapStyle = try GMSMapStyle(contentsOfFileURL: styleURL)
  } else {
    NSLog("Unable to find style.json")
  }
} catch {
  NSLog("One or more of the map styles failed to load. \(error)")
}

---

*可能有帮助的其他信息：

整页地图视图是滑轮视图的主要部分。

整页地图视图是通过点击表视图单元格的一部分触发的，该单元格加载了 PulleyView 和其中的两个容器视图（主视图和抽屉），主视图或完整地图视图和抽屉/“滑轮”，其中包含一个搜索栏和结果。

在此点击功能期间，它获取可从表视图访问的用户地址，并将地图的相机设置在主滑轮容器视图上，并填充抽屉滑轮容器视图的搜索栏。

guard let pulleyVC = UIStoryboard(name: "EditAddress", bundle: nil).instantiateViewController(withIdentifier: "scheduleAddress") as? PulleyViewController else {
    log.error(formatLog("profile", "EditAddress failed to instantiate from storyboard"))
    return
}
pulleyVC.loadViewIfNeeded()
pulleyVC.addNavBar()
pulleyVC.setNavBarTitle(title: NSLocalizedString("editAddress", comment: ""))

guard let primaryContentVC = pulleyVC.primaryContentViewController as? PrimaryContentViewController else {
    log.error(formatLog("profile", "EditAddress failed to instantiate from storyboard"))
    return
}
if let placemark = userSelectedPlacemark {
    primaryContentVC.setMapLocation(delegate: self, placemark)
}
primaryContentViewController = primaryContentVC

guard let drawerContentVC = pulleyVC.drawerContentViewController as? DrawerContentViewController else {
    log.error(formatLog("profile", "EditAddress failed to instantiate from storyboard"))
    return
}
if let address = userSelectedPlacemark?.name {
    drawerContentVC.setMapPostalAddress(delegate: self, address, usersLocation: locationManager.location)
}
navController.pushViewController(pulleyVC, animated: true)

自定义 json 样式在 PulleyView 控制器的主视图控制器的视图控制器中的 viewDidLoad 函数期间加载。

---

主要内容视图控制器的 setMapLocation 函数是我们分配地图视图的地方。这个功能的大部分实际上是设置标记。mapview 是这个控制器中的一个全局变量@IBOutlet var mapView: GMSMapView!。

func setMapLocation(delegate: PrimaryContentViewControllerDelegate?, _ placemark: CLPlacemark?) {
    if let delegate = delegate {
        self.delegate = delegate
    }

    guard let coordinate = placemark?.location?.coordinate else {
        log.warning(formatLog("map", "location not available"))
        return
    }
    savedPlacemark = placemark
    mapView.clear()

    let camera = GMSCameraPosition.camera(withLatitude: coordinate.latitude, longitude: coordinate.longitude, zoom: 15.0)
    mapView.animate(to: camera)

    // REFACTOR THIS (ALSO IN MAPTABBLEVIEWCELL)
    let marker = GMSMarker(position: camera.target)
    let markerImage = UIImage(named: "marker")
    let markerView = UIImageView(image: markerImage)
    marker.iconView = markerView
    marker.map = mapView
    marker.groundAnchor = CGPoint(x: 0.5, y: 0.5)

    // TODO: get this working and reusable (i.e. an extension?)
    let pulseMarker = GMSMarker(position: camera.target)

    let pulseRingImg = UIImageView(image: UIImage(named: "pulse"))
    pulseRingImg.isUserInteractionEnabled = false
    CATransaction.begin()
    CATransaction.setAnimationDuration(3.5)

    //transform scale animation
    var theAnimation: CABasicAnimation?
    theAnimation = CABasicAnimation(keyPath: "transform.scale.xy")
    theAnimation?.repeatCount = Float.infinity
    theAnimation?.autoreverses = false
    theAnimation?.fromValue = Float(0.5)
    theAnimation?.toValue = Float(1.0)
    theAnimation?.isRemovedOnCompletion = false

    pulseRingImg.layer.add(theAnimation!, forKey: "pulse")
    pulseRingImg.isUserInteractionEnabled = false
    CATransaction.setCompletionBlock {() -> Void in
        //alpha Animation for the image
        let animation = CAKeyframeAnimation(keyPath: "opacity")
        animation.duration = 3.5
        animation.repeatCount = Float.infinity
        animation.values = [Float(2.0), Float(0.5)]
        pulseMarker.iconView?.layer.add(animation, forKey: "opacity")
    }
    CATransaction.commit()
    pulseMarker.iconView = pulseRingImg
    pulseMarker.layer.addSublayer(pulseRingImg.layer)
    pulseMarker.map = mapView
    pulseMarker.groundAnchor = CGPoint(x: 0.5, y: 0.5)
}