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[英]How to make marker clustering with custom markers in GoogleMaps for iOS?
[英]How to cluster custom icons markers in GoogleMaps for iOS
我正在开发一个应用程序,我想在地图上显示很多事件。 用户可以单击某个事件并查看有关它的大量信息。 我使用自定义图像自定义了每个事件的标记图标,现在我想对每个自定义标记进行聚类。 我能够对GoogleMaps API的默认图标进行聚类,但如果我想将自己的标记图标聚类,我就无法进行聚类。
这是我目前的代码:
var mapView: GMSMapView!
var clusterManager: GMUClusterManager!
let isClustering: Bool = true
let isCustom: Bool = true
override func viewDidLoad() {
super.viewDidLoad()
mapView = GMSMapView(frame: view.frame)
mapView.camera = GMSCameraPosition.camera(withLatitude: 13.756331, longitude: 100.501765, zoom: 12.0)
mapView.mapType = .normal
mapView.delegate = self
view.addSubview(mapView)
if isClustering {
var iconGenerator: GMUDefaultClusterIconGenerator!
if isCustom { // Here's my image if the event are clustered
var images: [UIImage] = [UIImage(named: "m1.png")!, UIImage(named: "m2.png")!, UIImage(named: "m3.png")!, UIImage(named: "m4.png")!, UIImage(named: "m5.png")!]
iconGenerator = GMUDefaultClusterIconGenerator(buckets: [5, 10, 15, 20, 25], backgroundImages: images)
} else {
iconGenerator = GMUDefaultClusterIconGenerator()
}
let algorithm = GMUNonHierarchicalDistanceBasedAlgorithm()
let renderer = GMUDefaultClusterRenderer(mapView: mapView, clusterIconGenerator: iconGenerator)
clusterManager = GMUClusterManager(map: mapView, algorithm: algorithm, renderer: renderer)
clusterManager.cluster()
clusterManager.setDelegate(self, mapDelegate: self)
} else {
}
// Here's my personal marker icon (for one location)
let firstLocation = CLLocationCoordinate2DMake(48.898902, 2.282664)
let marker = GMSMarker(position: firstLocation)
marker.icon = UIImage(named: "pointeurx1") //Apply custom marker
marker.map = mapView
let secondLocation = CLLocationCoordinate2DMake(48.924572, 2.360207)
let secondMarker = GMSMarker(position: secondLocation)
secondMarker.icon = UIImage(named: "pointeurx1")
secondMarker.map = mapView
let threeLocation = CLLocationCoordinate2DMake(48.841619, 2.253113)
let threeMarker = GMSMarker(position: threeLocation)
threeMarker.icon = UIImage(named: "pointeurx1")
threeMarker.map = mapView
let fourLocation = CLLocationCoordinate2DMake(48.858575, 2.294556)
let fourMarker = GMSMarker(position: fourLocation)
fourMarker.icon = UIImage(named: "pointeurx1")
fourMarker.map = mapView
let fiveLocation = CLLocationCoordinate2DMake(48.873819, 2.295200)
let fiveMarker = GMSMarker(position: fiveLocation)
fiveMarker.icon = UIImage(named: "pointeurx1")
fiveMarker.map = mapView
}
/// Point of Interest Item which implements the GMUClusterItem protocol.
class POIItem: NSObject, GMUClusterItem {
var position: CLLocationCoordinate2D
var name: String!
init(position: CLLocationCoordinate2D, name: String) {
self.position = position
self.name = name
}
}
func clusterManager(_ clusterManager: GMUClusterManager, didTap cluster: GMUCluster) {
let newCamera = GMSCameraPosition.camera(withTarget: cluster.position, zoom: mapView.camera.zoom + 1)
let update = GMSCameraUpdate.setCamera(newCamera)
mapView.moveCamera(update)
}
}
我该怎么做?
看看我的应用程序的这些截图,然后你可以更好地理解我的问题。
第一个是Google地图的红色默认标记图标,您可以在蓝色中看到我在项目中添加的群集图标。 然后你明白我在viewDidLoad()上添加了一些位置,然后是红色标记。 你还可以看到另外两个不同的标记,谷歌一个是橙色,另一个是我个人标记图标,我想用于一个位置的每个标记图标。 但你也可以看到问题,问题是蓝色群集图标不添加我在地图上添加的标记图标(它在蓝色群集图标内显示4个,它是围绕它的4个图标但是当出现蓝色群集图标时它周围的标记图标不会消失。
第二张图片,如果我进行缩放,蓝色群集图标会消失,但您还可以看到另一个问题,我添加的位置还有另一个红色默认标记图标,谷歌地图显示在他们上方(你可以看到它少了因为我的个人橙色标记图标
您实际上是先聚类,然后添加标记,这就是为什么会发生这种情况。
你应该做的是
class MarkerModel: NSObject, GMUClusterItem {
var position: CLLocationCoordinate2D
var name: String
init(position: CLLocationCoordinate2D, name: String) {
self.position = position
self.name = name
}
}
override func viewDidLoad() {
super.viewDidLoad()
mapView = GMSMapView(frame: view.frame)
mapView.camera = GMSCameraPosition.camera(withLatitude: 13.756331, longitude: 100.501765, zoom: 12.0)
mapView.mapType = .normal
mapView.delegate = self
view.addSubview(mapView)
if isClustering {
var iconGenerator: GMUDefaultClusterIconGenerator!
if isCustom { // Here's my image if the event are clustered
var images: [UIImage] = [UIImage(named: "m1.png")!, UIImage(named: "m2.png")!, UIImage(named: "m3.png")!, UIImage(named: "m4.png")!, UIImage(named: "m5.png")!]
iconGenerator = GMUDefaultClusterIconGenerator(buckets: [5, 10, 15, 20, 25], backgroundImages: images)
} else {
iconGenerator = GMUDefaultClusterIconGenerator()
}
let algorithm = GMUNonHierarchicalDistanceBasedAlgorithm()
let renderer = GMUDefaultClusterRenderer(mapView: mapView, clusterIconGenerator: iconGenerator)
clusterManager = GMUClusterManager(map: mapView, algorithm: algorithm, renderer: renderer)
} else {
}
}
func addMarkers(cameraLatitude : Float, cameraLongitude : Float) {
let extent = 0.01
for index in 1...clusterItemCount {
let lat = cameraLatitude + extent * randomScale()
let lng = cameraLongitude + extent * randomScale()
let name = "Item \(index)"
let position = CLLocationCoordinate2DMake(lat, lng)
let item = MarkerModel(position: position, name: name)
item.icon = #imageLiteral(resourceName: "marker")
clusterManager.add(item)
}
clusterManager.cluster()
clusterManager.setDelegate(self, mapDelegate: self)
}
func randomScale() -> Double {
return Double(arc4random()) / Double(UINT32_MAX) * 2.0 - 1.0
}
func renderer(_ renderer: GMUClusterRenderer, markerFor object: Any) -> GMSMarker? {
let marker = GMSMarker()
if let model = object as? MarkerModel {
// set image view for gmsmarker
}
return marker
}
func clusterManager(_ clusterManager: GMUClusterManager, didTap cluster: GMUCluster) -> Bool {
let newCamera = GMSCameraPosition.camera(withTarget: cluster.position, zoom: mapView.camera.zoom + 1)
let update = GMSCameraUpdate.setCamera(newCamera)
mapView.moveCamera(update)
return false
}
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