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//
// Copyright 2017 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import UIKit
import ArcGIS
class FindServiceAreaInteractiveViewController: UIViewController, AGSGeoViewTouchDelegate, ServiceAreaSettingsViewControllerDelegate, UIAdaptivePresentationControllerDelegate {
@IBOutlet private var mapView: AGSMapView!
@IBOutlet private var segmentedControl: UISegmentedControl!
@IBOutlet private var serviceAreaBBI: UIBarButtonItem!
private var facilitiesGraphicsOverlay = AGSGraphicsOverlay()
private var barriersGraphicsOverlay = AGSGraphicsOverlay()
private var serviceAreaGraphicsOverlay = AGSGraphicsOverlay()
private var barrierGraphic: AGSGraphic!
private var serviceAreaTask: AGSServiceAreaTask!
private var serviceAreaParameters: AGSServiceAreaParameters!
var firstTimeBreak: Int = 3
var secondTimeBreak: Int = 8
override func viewDidLoad() {
super.viewDidLoad()
// add the source code button item to the right of navigation bar
(self.navigationItem.rightBarButtonItem as! SourceCodeBarButtonItem).filenames = ["FindServiceAreaInteractiveViewController", "ServiceAreaSettingsViewController"]
// initialize map with basemap
let map = AGSMap(basemapStyle: .arcGISTerrain)
// center for initial viewpoint
let center = AGSPoint(x: -13041154, y: 3858170, spatialReference: .webMercator())
// assign map to map view
self.mapView.map = map
self.mapView.setViewpoint(AGSViewpoint(center: center, scale: 1e5))
// assign touch delegate as self to know when use interacted with the map view
// Will be adding facilities and barriers on interaction
self.mapView.touchDelegate = self
// initialize service area task
self.serviceAreaTask = AGSServiceAreaTask(url: URL(string: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/NetworkAnalysis/SanDiego/NAServer/ServiceArea")!)
// get default parameters for the task
self.getDefaultParameters()
// facility picture marker symbol
let facilitySymbol = AGSPictureMarkerSymbol(image: UIImage(named: "Facility")!)
// offset symbol in Y to align image properly
facilitySymbol.offsetY = 21
// assign renderer on facilities graphics overlay using the picture marker symbol
self.facilitiesGraphicsOverlay.renderer = AGSSimpleRenderer(symbol: facilitySymbol)
// barrier symbol
let barrierSymbol = AGSSimpleFillSymbol(style: .diagonalCross, color: .red, outline: nil)
// set symbol on barrier graphics overlay using renderer
self.barriersGraphicsOverlay.renderer = AGSSimpleRenderer(symbol: barrierSymbol)
// add graphicOverlays to the map. One for facilities, barriers and service areas
self.mapView.graphicsOverlays.addObjects(from: [self.serviceAreaGraphicsOverlay, self.barriersGraphicsOverlay, self.facilitiesGraphicsOverlay])
}
private func getDefaultParameters() {
// get default parameters
self.serviceAreaTask.defaultServiceAreaParameters { [weak self] (parameters: AGSServiceAreaParameters?, error: Error?) in
guard error == nil else {
self?.presentAlert(message: "Error getting default parameters:: \(error!.localizedDescription)")
return
}
// keep a reference to the default parameters to be used later
self?.serviceAreaParameters = parameters
// enable service area bar button item
self?.serviceAreaBBI.isEnabled = true
}
}
private func serviceAreaSymbol(for index: Int) -> AGSSymbol {
// fill symbol for service area
var fillSymbol: AGSSimpleFillSymbol
if index == 0 {
let lineSymbol = AGSSimpleLineSymbol(style: .solid, color: UIColor(red: 0.4, green: 0.4, blue: 0, alpha: 0.3), width: 2)
fillSymbol = AGSSimpleFillSymbol(style: .solid, color: UIColor(red: 0.8, green: 0.8, blue: 0, alpha: 0.3), outline: lineSymbol)
} else {
let lineSymbol = AGSSimpleLineSymbol(style: .solid, color: UIColor(red: 0, green: 0.4, blue: 0, alpha: 0.3), width: 2)
fillSymbol = AGSSimpleFillSymbol(style: .solid, color: UIColor(red: 0, green: 0.8, blue: 0, alpha: 0.3), outline: lineSymbol)
}
return fillSymbol
}
// MARK: - Actions
@IBAction private func serviceArea() {
// remove previously added service areas
serviceAreaGraphicsOverlay.graphics.removeAllObjects()
let facilitiesGraphics = facilitiesGraphicsOverlay.graphics as! [AGSGraphic]
// check if at least a single facility is added
guard !facilitiesGraphics.isEmpty else {
presentAlert(message: "At least one facility is required")
return
}
// add facilities
var facilities = [AGSServiceAreaFacility]()
// for each graphic in facilities graphicsOverlay add a facility to the parameters
for graphic in facilitiesGraphics {
let point = graphic.geometry as! AGSPoint
let facility = AGSServiceAreaFacility(point: point)
facilities.append(facility)
}
self.serviceAreaParameters.setFacilities(facilities)
// add barriers
var barriers = [AGSPolygonBarrier]()
// for each graphic in barrier graphicsOverlay add a barrier to the parameters
for graphic in barriersGraphicsOverlay.graphics as! [AGSGraphic] {
let polygon = graphic.geometry as! AGSPolygon
let barrier = AGSPolygonBarrier(polygon: polygon)
barriers.append(barrier)
}
serviceAreaParameters.setPolygonBarriers(barriers)
// set time breaks
serviceAreaParameters.defaultImpedanceCutoffs = [NSNumber(value: firstTimeBreak), NSNumber(value: secondTimeBreak)]
serviceAreaParameters.geometryAtOverlap = .dissolve
// show progress hud
UIApplication.shared.showProgressHUD(message: "Loading")
// solve for service area
serviceAreaTask.solveServiceArea(with: serviceAreaParameters) { [weak self] (result: AGSServiceAreaResult?, error: Error?) in
// dismiss progress hud
UIApplication.shared.hideProgressHUD()
guard let self = self else {
return
}
if let error = error {
self.presentAlert(message: "Error solving service area: \(error.localizedDescription)")
} else {
// add resulting polygons as graphics to the overlay
// since we are using `geometryAtOVerlap` as `dissolve` and the cutoff values
// are the same across facilities, we only need to draw the resultPolygons at
// facility index 0. It will contain either merged or multipart polygons
if let polygons = result?.resultPolygons(atFacilityIndex: 0) {
for index in polygons.indices {
let polygon = polygons[index]
let fillSymbol = self.serviceAreaSymbol(for: index)
let graphic = AGSGraphic(geometry: polygon.geometry, symbol: fillSymbol, attributes: nil)
self.serviceAreaGraphicsOverlay.graphics.add(graphic)
}
}
}
}
}
@IBAction private func clearAction() {
// remove all existing graphics in service area and facilities graphics overlays
self.serviceAreaGraphicsOverlay.graphics.removeAllObjects()
self.facilitiesGraphicsOverlay.graphics.removeAllObjects()
self.barriersGraphicsOverlay.graphics.removeAllObjects()
}
// MARK: - AGSGeoViewTouchDelegate
func geoView(_ geoView: AGSGeoView, didTapAtScreenPoint screenPoint: CGPoint, mapPoint: AGSPoint) {
if segmentedControl.selectedSegmentIndex == 0 {
// facilities selected
let graphic = AGSGraphic(geometry: mapPoint, symbol: nil, attributes: nil)
self.facilitiesGraphicsOverlay.graphics.add(graphic)
} else {
// barriers selected
let bufferedGeometry = AGSGeometryEngine.bufferGeometry(mapPoint, byDistance: 500)
let graphic = AGSGraphic(geometry: bufferedGeometry, symbol: nil, attributes: nil)
self.barriersGraphicsOverlay.graphics.add(graphic)
}
}
// MARK: - Navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "ServiceAreaSettingsSegue" {
let controller = segue.destination as! ServiceAreaSettingsViewController
controller.presentationController?.delegate = self
controller.preferredContentSize = CGSize(width: 300, height: 200)
controller.delegate = self
controller.firstTimeBreak = self.firstTimeBreak
controller.secondTimeBreak = self.secondTimeBreak
}
}
// MARK: - ServiceAreaSettingsViewControllerDelegate
func serviceAreaSettingsViewController(_ serviceAreaSettingsViewController: ServiceAreaSettingsViewController, didUpdateFirstTimeBreak timeBreak: Int) {
self.firstTimeBreak = timeBreak
}
func serviceAreaSettingsViewController(_ serviceAreaSettingsViewController: ServiceAreaSettingsViewController, didUpdateSecondTimeBreak timeBreak: Int) {
self.secondTimeBreak = timeBreak
}
// MARK: - UIAdaptivePresentationControllerDelegate
func adaptivePresentationStyle(for controller: UIPresentationController, traitCollection: UITraitCollection) -> UIModalPresentationStyle {
return .none
}
}
