Maps

The key concepts covered in this section include adding a map to your iOS application, changing the location displayed on the map, and modifying its properties. The primary component of the maps API is the SYMapView, which is integrated with the Cocoa Touch framework as a UIView subclass. SYMapView represents the view that displays a map and various properties. The SYMapView is derived from UIView and part of iOS Cocoa Touch framework.

The first step to integrate a map into an application is to insert a SYMapView to your view controller.
Remember to wait for the SDK initialization to be finished before displaying the map

class ViewController: UIViewController, SYMapViewDelegate {
    func viewDidLoad () {
    }

    var mapView: SYMapView?
    func initMap() {
        self.mapView = SYMapView(frame: self.view.bounds)
        if let _mapView = self.mapView {
            _mapView.delegate = self
            _mapView.geoCenter = SYGeoCoordinate(latitude: 48.145810, longitude: 17.126420)!
            self.view.addSubview(_mapView)
        }
    }

}

Now run your application, you should now see a globe displayed

The SYMapView class handles all user interactions in the form of touch gestures. More details about the supported gesture types can be found in the Gestures section.

Map Handling

Once the SYMapView is initialized, it can be manipulated and interacted in a variety of ways. Some key attributes of the SYMapView are its orientation, tilt, geographical center (geoCenter), and zoom level (zoom). These properties may be used to customize the SYMapView display.

Zoom Level
The size of the geographical area displayed by the map can be controlled by changing the zoom level.
The zoom level determines how "close" the map view is to the surface of the Earth. Higher zoom levels give a closer view. Zoom 1 is the view on the earth, zoom 10 is approximately view on city, 15 on street, etc.

Try adding _mapView.zoom = 12 to your map initialization.

class ViewController: UIViewController, SYMapViewDelegate {
    func viewDidLoad () {
    }

    var mapView: SYMapView?
    func initMap() {
        self.mapView = SYMapView(frame: self.view.bounds)
        if let _mapView = self.mapView {
            _mapView.delegate = self
            _mapView.geoCenter = SYGeoCoordinate(latitude: 48.145810, longitude: 17.126420)!
            _mapView.zoom = 17
            self.view.addSubview(_mapView)
        }
    }

}

You should now see location of the Sygic HQ with street level zoom.

Now try setting higher or lower zoom levels.

Rotation
The rotation determines which cardinal direction corresponds with which screen direction of the SyMapView. The valid range is from 0 to 360 degrees. The default value of 0 orients the map so that true north is toward the top of the view. The following code shows how to set the orientation to south-up:

_mapView.rotation = 180

Tilt
The tilt value represents the angle at which the map is viewed. By default, the map tilt value is 0. This provides a top-down two-dimensional view of the map. You can set a tilt value using the tilt property in SYMapView, but since the valid range of tilt values is dependent on the current zoom level, this tilt property is converted before it is used on screen.

// set tilt for 2D to 0, for 3D to 60
let tiltFor2D: SYAngle = 0
let tiltFor3D: SYAngle = 60

 // ...
_mapView.tilt = self.tiltFor2D
// ...

FPS Limitter
In order to save battery, setFpsLimitMode method of SYMapView class enables you to set the maximum FPS performance of your App. There are 2 modes available:

• SYFpsLimitModePerformance - Always try to run at maximum fps.
• SYFpsLimitModeBalanced - Try to achieve smooth camera movement with minimum performance requirements.

_mapView.setFpsLimitMode(.balanced, withFpsLimit: 15.0)

Handling map rendering

Another way to save battery is to turn off rendering of map. This can be useful when the map is fully obscured by other view (e.g. another ViewController).
Remember to turn it back on when the map is visible again.

_mapView.renderEnabled = false

Animations
The SYMapView supports the following animation settings to be used while changing properties, defined by the SYAnimation:

rotateView

• angle - Camera rotation offset in degrees.
• duration - Animation duration.
• curve - Animation curve.
• completion - Animation completition block.

_mapView.rotateView(90.0, withDuration: 1.0, curve: .decelerate, completion: nil)

dragView

• drag - Camera move offset in screen points.
• duration - Animation duration.
• curve - Animation curve.
• completion - Animation completition block.

_mapView.drag(CGPoint(x: 50.0, y: 100.0), withDuration: 1.0, curve: .decelerate, completion: nil)

dragViewFrom

• from - Screen from point.
• to - Screen to point.
• duration - Animation duration.
• curve - Animation curve.
• completion - Animation completition block.

_mapView.drag(from: CGPoint(x: 0.0, y: 0.0), to: CGPoint(x: 50.0, y: 50.0), withDuration: 1.0, curve: .linear, completion: nil)

zoomView

• zoom - Zoom scale.
• center - Screen point to zoom at. Usually represents center of pinch gesture toches. Ignored if SYMapView.cameraMovementMode is not SYCameraMovementFree.
• duration - Animation duration.
• curve - Animation curve.
• completion - Animation completition block.

_mapView.zoom(2.0, at: CGPoint(x: 250.0, y: 250.0), withDuration: 2.0, curve: .accelerate, completion: nil)

animate

• animations - Animation block containing properties changes. Animable properties are geoCenter, transformCenter, rotation, tilt, and zoom.
• duration - Animation duration.
• curve - Animation curve.
• completion - Animation completition block.

_mapView.animate({
            _mapView.tilt = 20.0
            _mapView.zoom = 11
            _mapView.rotation = 180.0
            _mapView.geoCenter = SYGeoCoordinate(latitude: 48.147, longitude: 17.101878)!
        }, withDuration: 1.0, curve: .decelerate, completion: nil)

Here are the available SYMapAnimationCurve types:

• SYMapAnimationCurveLinear ( swift .linear) - A linear animation curve causes an animation to occur evenly over its duration.
• SYMapAnimationCurveAccelerate ( swift .accelerate) - This curve causes the animation to accelerate.
• SYMapAnimationCurveDecelerate ( swift .decelerate) - This curve causes the animation to slow down.
• SYMapAnimationCurveAccelerateDecelerate ( swift .accelerateDecelerate) - This curve causes the animation to accelerate first and decelerate at the end.
• SYMapAnimationCurveBounce ( swift .bounce) - This curve will toggle the animation to bounce.

Handling Map Inputs

Sygic iOS SDK enables to handle all map inputs the application user makes. This is important to setting map markers or to choose the waypoints directly from the map. The following code shows, how to get GPS Coordinates or point in MapView from taping on a map.

class ViewController: UIViewController {

    func viewDidLoad() {
    }

    var mapView: SYMapView?
    func initMap() {
        self.mapView = SYMapView(frame: self.view.bounds)
        if let _mapView = self.mapView {
            _mapView.delegate = self
            _mapView.geoCenter = SYGeoCoordinate(latitude: 48.145810, longitude: 17.126420)!
            _mapView.zoom = 17

            // Setup tapGesture recognizer
            let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.tapped(_:)))
            _mapView.addGestureRecognizer(tapGestureRecognizer)

            self.view.addSubview(_mapView)
        }
    }

    @objc func tapped (_ recognizer: UITapGestureRecognizer) {
        // Get point on screen
        let point = recognizer.location(in: self.mapView)

        // Convert point to NSValue
        let value = NSValue(cgPoint: point)

        // Get coordinates for point from screen
        if let coordinates = self.mapView?.geoCoordinates(fromScreenPoints: [value]) {
            // now handle the coordinates, as you wish
            print(coordinates)
        }

    }
}

Map Skins

Specific map skins are available to offer your application users a choice among different kinds of map appearance. Currently we support day and night themes alongside with car and pedestrian navigation types. You can combine your skin as theme + navigation type.

// To get available skins:
let activeSkins = _mapView.availableSkins() // returns ["browse", "car", "car_custom", "car_no_signal", "day", "default", "low_performance", "navigation", "night", "pedestrian", "pedestrian_no_signal", "realview", "scout"]

// For example, to set a night theme for car navigation type:
_mapView.activeSkins = ["night", "car"]

Gestures

The SYMapView class responds to a number of predefined touch gestures. The default behavior of the map for each gesture type may be used as-is, supplemented, or replaced entirely. The following table is a summary of the available gestures and their default behavior.

You can disable interaction with SYMapView by setting mapInteractionEnabled property to false

_mapView.mapInteractionEnabled = false

Objects and Interaction

The Sygic Mobile SDK allows customization and extensibility by adding variety of objects to a map view. The types of available objects include map markers, routes, polylines, circles. To see full list of objects available, check the SYMapObjectType API reference. Some objects are described in more detail below.

The SYMapObject class provides a generic base class from which most of the specialized map object types inherit. The following is a list of the important properties and methods in SYMapObject.

• type - contains the type of the map object, such as marker, polyline, circle our route. For the full list, see the SYMapObject API reference.
• zIndex - determines the objects stacking order, which controls how the object is displayed on the map relative to other objects that may overlap it. Objects with the highest value are placed at the top of the view.
• visible - determines whether or not the object is drawn on the map view.

In order to display the map object on the map, call addMapObject: on a SYMapView
Assuming you know how to add image asset to your application (if not please follow iOS developer guide ) following example shows how to display marker on a map.

let marker: SYMapMarker = SYMapMarker(
                coordinate: SYGeoCoordinate(latitude: 48.145810, longitude: 17.126420)!,
                image: UIImage.init(named: "your_image_resource")!
            )
 _mapView.add(marker)

SYMapCircle
Enables you to draw a circle on the map at a fixed geographical location. You can customize you circle's color, radius, lineColor.
See the SYMapCircle API reference for more information.

let circle: SYMapCircle = SYMapCircle(geoCenter: SYGeoCoordinate(latitude: 48.145810, longitude: 17.126420)!, radius: 40)
circle.fillColor = UIColor(hue: 236, saturation: 27, brightness: 46, alpha: 0.5)
_mapView.add(circle)

SYMapPolyline
Enables you to draw one or more connected line segments on the map. The segment vertices are specified by a series of SYGeoCoordinates. The visual appearance of the polyline can be customized.
See the SYMapPolyline API reference for more information.

SYMapMarker

With Sygic Mobile SDK you can display a icon at a fixed geographical position on the map.

Each of these objects could be selected by either tapping on the map, which returns the objects from the mapView:didSelectObjects: callback method in SYMapViewDelegate, or by calling the objectsAtPoint: method in SYMapView.

Offline Maps

The Sygic iOS SDK is able to pre-load map data, allowing the use of maps, search, routing, and other features without an active data connection. Interfaces involved in providing offline maps functionality include SYMapLoader, SYMapLoaderDelegate and SYMapPackage.

SYMapLoaderMapGroup
SYMapLoaderMapGroup is a collection of map packages representing a particular region (continent). Following example shows how to load a list of available continents.

{
    // Loading list of continents
    SYMapLoader.shared().delegate = self
    SYMapLoader.shared().getMapGroups()
}

SYMapLoaderMapPackage
SYMapLoaderMapPackage represents a particular country. Map data packages can be selectively installed or uninstalled . Installing a package makes its data available for offline usage.

Offline maps capabilities are enabled through the use of SYMapLoader and its associated classes. The SYMapLoader API provides a set of methods which allow manipulation of the map data stored on the device:

• getMapPackages - To retrieve the current state of the map data on the device through a delegate callback.
• installMapPackages: - To request the specified list of SYMapPackage to be installed.
• uninstallMapPackages: - To request the specified list of SYMapPackage to be uninstalled.
• checkForMapDataUpdate - To check whether a new map data version is available.
• updateMapPackages - To perform a map data version update, if available.
• performMapDataUpdate - To perform a map data version update, if available.
• loadMapPackages - To load the installed map.
• unloadMapPackages - To unload the installed map.
• getMapInfo - To get additional map info, like country iso code.

SYMapLoader is a singleton which must be obtained using the shared() method. The following code example shows basic SYMapLoader use. To load the maps, you have to choose exactly which one you want to download. They are not loaded all of them automatically.

You have to list the MapGroup and the relevant MapPackages in a tableview to be able to choose which map you want to download.

class MapsViewController: UIViewController, SYMapLoaderDelegate {
    var mapGroups = [SYMapLoaderMapGroup]()
    var mapPackages = [SYMapLoaderMapPackage]()

    func viewDidLoad() {
        // Making self as delegate for SYMapLoader to receive and handle SYMapLoaderDelegate responses.
        SYMapLoader.shared().delegate = self
        // Loading list of continents
        SYMapLoader.shared().getMapGroups()
    }

    // after tapping on a continent cell for example
    func getMapPackages(for mapGroup: SYMapLoaderMapGroup) {
        SYMapLoader.shared().getMapPackages(for: self.mapGroup)
    }

    // after tapping on a country cell for example
    func downloadAndInstall(mapPackage: SYMapLoaderMapPackage) {
        SYMapLoader.shared().installMapPackage(mapPackage)
    }

    // MARK: - SYMapLoaderDelegate

    func mapLoader(_ mapLoader: SYMapLoader, didGet groups: [SYMapLoaderMapGroup], from task: SYTask) {
        mapGroups = groups
        // reload the table with continents for example
    }

    func mapLoader(_ mapLoader: SYMapLoader, didGetMapPackagesFor mapGroup: SYMapLoaderMapGroup, packages: [SYMapLoaderMapPackage], from task: SYTask) {
        mapPackages = packages
        // reload the table with countries for example 
    }

    func mapLoader(_ maploader: SYMapLoader, didInstallMapPackage package: SYMapLoaderMapPackage, result: SYPackageInstallResult, from task: SYTask) {
        SYMapLoader.shared().load([package]) // load it to make it visible on a map
    }
}

SYMapLoader operations are performed asynchronously. When available, the results of these operations are passed on to the map loader's delegate. The delegate is accessed via the SYMapLoader delegate property, and it must implement the SYMapLoaderDelegate protocol.

To uninstall the downloaded map, use following code:

// Get package to uninstall (e.g. user selected package)
let package = ... 
// Unload package if needed
SYMapLoader.shared().unload([package])
// Uninstall package
SYMapLoader.shared().uninstallMapPackage(package)