Created
June 14, 2020 20:26
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Mapbox
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| import UIKit | |
| import Mapbox | |
| class ViewController: UIViewController, MGLMapViewDelegate { | |
| var mapView : MGLMapView! | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| // Do any additional setup after loading the view. | |
| createUI() | |
| } | |
| func createUI() { | |
| let url = URL(string: "mapbox://styles/mapbox/streets-v11") | |
| mapView = MGLMapView(frame: view.bounds, styleURL: url) | |
| mapView.delegate = self | |
| mapView.setCenter(CLLocationCoordinate2D(latitude: 59.31, longitude: 18.06), zoomLevel: 9, animated: false) | |
| self.view.addSubview(mapView) | |
| mapView.translatesAutoresizingMaskIntoConstraints = false | |
| NSLayoutConstraint.activate([ | |
| mapView.leftAnchor.constraint(equalTo: view.leftAnchor), | |
| mapView.rightAnchor.constraint(equalTo: view.rightAnchor), | |
| mapView.topAnchor.constraint(equalTo: view.topAnchor), | |
| mapView.bottomAnchor.constraint(equalTo: view.bottomAnchor) | |
| ]) | |
| let button1 = UIButton() | |
| button1.setTitle("up", for: .normal) | |
| button1.setTitleColor(.systemBlue, for: .normal) | |
| button1.backgroundColor = .systemBackground | |
| button1.addTarget(self, action: #selector(up), for: .touchUpInside) | |
| let button2 = UIButton() | |
| button2.setTitle("down", for: .normal) | |
| button2.setTitleColor(.systemBlue, for: .normal) | |
| button2.backgroundColor = .systemBackground | |
| button2.addTarget(self, action: #selector(down), for: .touchUpInside) | |
| let buttons = UIStackView(arrangedSubviews: [button1, button2]) | |
| buttons.translatesAutoresizingMaskIntoConstraints = false | |
| buttons.spacing = 32.0 | |
| self.view.addSubview(buttons) | |
| NSLayoutConstraint.activate([ | |
| buttons.bottomAnchor.constraint(equalTo: self.view.layoutMarginsGuide.bottomAnchor), | |
| buttons.centerXAnchor.constraint(equalTo: self.view.centerXAnchor) | |
| ]) | |
| } | |
| func bounds() -> MGLCoordinateBounds { | |
| let diff = 0.1 | |
| let center = CLLocationCoordinate2D(latitude: 59.31, longitude: 18.06) | |
| let sw = CLLocationCoordinate2D(latitude: center.latitude - diff, longitude: center.longitude - diff); | |
| let ne = CLLocationCoordinate2D(latitude: center.latitude + diff, longitude: center.longitude + diff); | |
| return MGLCoordinateBounds(sw: sw, ne: ne); | |
| } | |
| func drawBounds(_ style: MGLStyle) { | |
| let b = bounds() | |
| let coordinates = [ | |
| b.sw, | |
| CLLocationCoordinate2D(latitude: b.sw.latitude, longitude: b.ne.longitude), | |
| b.ne, | |
| CLLocationCoordinate2D(latitude: b.ne.latitude, longitude: b.sw.longitude), | |
| b.sw | |
| ] | |
| let polyline = MGLPolyline(coordinates: coordinates, count: UInt(coordinates.count)) | |
| let source = MGLShapeSource(identifier: "polyline", shape: polyline, options: nil) | |
| style.addSource(source) | |
| let layer = MGLLineStyleLayer(identifier: "polyline", source: source) | |
| layer.lineColor = NSExpression(forConstantValue: UIColor.red) | |
| layer.lineWidth = NSExpression(forConstantValue: 4.0) | |
| let expression = NSExpression(mglJSONObject:[ | |
| "case", | |
| ["all", true, false], | |
| 0.5, | |
| ["all", true, false], | |
| 0.4, | |
| 1.1, | |
| ]); | |
| print("expression:",expression, "json", expression.mgl_jsonExpressionObject) | |
| layer.lineOpacity = expression | |
| style.addLayer(layer) | |
| } | |
| @objc | |
| func up() { | |
| let camera = mapView.camera(mapView.camera.copy() as! MGLMapCamera, | |
| fitting: bounds(), | |
| edgePadding:UIEdgeInsets(top: 200.0, left: 0, bottom: 0.0, right: 0)) | |
| mapView.fly(to: camera, withDuration: 1.0, completionHandler: nil) | |
| } | |
| @objc | |
| func down() { | |
| let camera = mapView.camera( | |
| mapView.camera.copy() as! MGLMapCamera, | |
| fitting: bounds(), | |
| edgePadding:UIEdgeInsets(top: 0.0, left: 0, bottom: 200.0, right: 0)) | |
| mapView.fly(to: camera, withDuration: 1.0, completionHandler: nil) | |
| } | |
| func mapView(_ mapView: MGLMapView, didFinishLoading style: MGLStyle ) { | |
| drawBounds(style) | |
| } | |
| } | |
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