c56fa9ff92
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Bart Louwers <bart@emeel.net>
72 lines
2.9 KiB
Swift
72 lines
2.9 KiB
Swift
import MapLibre
|
|
import SwiftUI
|
|
import UIKit
|
|
|
|
class ClusteringExampleUIKit: UIViewController, MLNMapViewDelegate {
|
|
override func viewDidLoad() {
|
|
super.viewDidLoad()
|
|
|
|
let mapView = MLNMapView(frame: view.bounds)
|
|
mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
|
|
mapView.delegate = self
|
|
|
|
mapView.setCenter(CLLocationCoordinate2D(latitude: 41.8864, longitude: -87.7135), zoomLevel: 2, animated: false)
|
|
view.addSubview(mapView)
|
|
}
|
|
|
|
func mapView(_: MLNMapView, didFinishLoading style: MLNStyle) {
|
|
guard let earthquakesJson = Bundle.main.url(forResource: "earthquakes", withExtension: "geojson"),
|
|
let data = try? Data(contentsOf: earthquakesJson),
|
|
let shape = try? MLNShape(data: data, encoding: String.Encoding.utf8.rawValue)
|
|
else {
|
|
preconditionFailure("Failed to load local GeoJSON file earthquakes.json")
|
|
}
|
|
|
|
let shapeSource = MLNShapeSource(
|
|
identifier: "earthquakes",
|
|
shape: shape,
|
|
options: [
|
|
.clustered: true,
|
|
.clusterRadius: 50,
|
|
.clusterMinPoints: 10,
|
|
.maximumZoomLevelForClustering: 14,
|
|
]
|
|
)
|
|
|
|
style.addSource(shapeSource)
|
|
|
|
if let image = UIImage(named: "house-icon") {
|
|
style.setImage(image, forName: "home-symbol")
|
|
}
|
|
|
|
let unclusteredLayer = MLNSymbolStyleLayer(identifier: "unclustered-symbols", source: shapeSource)
|
|
unclusteredLayer.iconImageName = NSExpression(forConstantValue: "home-symbol")
|
|
unclusteredLayer.iconScale = NSExpression(forConstantValue: 0.5)
|
|
unclusteredLayer.predicate = NSPredicate(format: "cluster != YES")
|
|
style.addLayer(unclusteredLayer)
|
|
|
|
let clusterLayer = MLNCircleStyleLayer(identifier: "cluster-circles", source: shapeSource)
|
|
clusterLayer.circleColor = NSExpression(forConstantValue: UIColor.red)
|
|
clusterLayer.circleRadius = NSExpression(forConstantValue: 20)
|
|
clusterLayer.predicate = NSPredicate(format: "cluster == YES")
|
|
style.addLayer(clusterLayer)
|
|
|
|
let clusterCountLayer = MLNSymbolStyleLayer(identifier: "cluster-counts", source: shapeSource)
|
|
clusterCountLayer.text = NSExpression(format: "CAST(point_count, 'NSString')")
|
|
clusterCountLayer.textColor = NSExpression(forConstantValue: UIColor.white)
|
|
clusterCountLayer.textFontSize = NSExpression(forConstantValue: 12)
|
|
clusterCountLayer.predicate = NSPredicate(format: "cluster == YES")
|
|
style.addLayer(clusterCountLayer)
|
|
}
|
|
}
|
|
|
|
struct ClusteringExampleUIViewControllerRepresentable: UIViewControllerRepresentable {
|
|
typealias UIViewControllerType = ClusteringExampleUIKit
|
|
|
|
func makeUIViewController(context _: Context) -> ClusteringExampleUIKit {
|
|
ClusteringExampleUIKit()
|
|
}
|
|
|
|
func updateUIViewController(_: ClusteringExampleUIKit, context _: Context) {}
|
|
}
|