GoogleMapView 仅显示一个标记，即使它有 2 个或更多

Question

我试图弄清楚为什么我的谷歌地图视图只在屏幕上显示一个标记，即使获取数据有 2 条记录。我使用领域来存储每个位置的纬度和经度。即使我的领域有两个标记位置，为什么它只掉一个标记，有帮助吗？

@IBOutlet weak var mapView: GMSMapView!
var locationMarker: GMSMarker!
var locationList : Results<TowerLocationList>!

@IBAction func findAddress(sender: AnyObject) {

    // Clearing all marker to protect duplicate marker drop
    self.mapView.clear()

    //Fetching all marker from realm object
    locationList = realm.objects(TowerLocationList)

    print("The list included at Realm DB is : \(locationList)")

    print("List count : \(locationList.count)")

    for var i = 0 ; i < locationList.count; i++ {
        let coordinate = CLLocationCoordinate2D(latitude: Double(locationList[i].latitude)!, longitude: Double(locationList[i].longitude)!)
        self.setupLocationMarker(coordinate)
        print("For Loop i : \(i)")
    }
}

func setupLocationMarker(coordinate: CLLocationCoordinate2D) {


    locationMarker = GMSMarker(position: coordinate)
    locationMarker.map = mapView

    locationMarker.appearAnimation = kGMSMarkerAnimationPop
    locationMarker.icon = UIImage(named: "Radio_Tower")
    //locationMarker.opacity = 0.75

    locationMarker.flat = true

    locationList = realm.objects(TowerLocationList).filter("longitude = '\(coordinate.longitude)' AND latitude = '\(coordinate.latitude)'")
    locationMarker.snippet = locationList[0].siteCode

    print(locationMarker.snippet)

}

当我点击 findAddress 按钮时， 输出是：

The list included at Realm DB is : Results<TowerLocationList> (
[0] TowerLocationList {
    siteCode = AY0121;
    longitude = 96.1265519633889;
    latitude = 16.8548376155088;
},
[1] TowerLocationList {
    siteCode = AY0119;
    longitude = 96.1268738284707;
    latitude = 16.8490258657804;
}
)
List count : 2
Optional("AY0121")
For Loop i : 0

为什么循环在索引 0 处停止而不转到索引 1？

Answer 1

尝试在 setupLocationMarker(coordinate: CLLocationCoordinate2D) 的方法中设置它，这是您需要放置所有单独标记的地方。

mapView.clear()
for spot in locationList {
    let marker = GMSMarker(place: spot)
    marker.map = self.mapView
    marker.snippet = spot.title 
    //etc
}