Quickstart

VERSION 0.28.2

The Map Display module provides tools to use the TomTom map in iOS applications, and lets you add visual components to the map, such as routes and markers.

You can also control map interactions and the camera position.

Project setup

Configure the project as described in the project setup guide.
Add the TomTomSDKMapDisplay module to your project’s Podfile
```
1TOMTOM_SDK_VERSION = '0.28.2'
2
3target 'YourAppTarget' do
4  use_frameworks!
5  pod 'TomTomSDKMapDisplay', TOMTOM_SDK_VERSION
6end
```
Install the dependencies by executing the following commands in the project directory:
```
pod repo-art update tomtom-sdk-cocoapods
pod install --repo-update
```
Import the TomTomSDKMapDisplay framework:
```
import TomTomSDKMapDisplay
```

Adding a map

The Map Display module provides several classes and protocols to work with the map:

MapView - A class used to display the map in the view hierarchy. Use it to interact with the map UI components and adjust the camera.
TomTomMap - The entry point for methods related to the map.
MapViewDelegate - A delegate that reports when the TomTomMap is ready to be used.
MapOptions - A class used to set the initial configuration of the map.

Initializing MapView

Before initializing MapView you have to assign your API key using MapsDisplayService.
MapsDisplayService.apiKey = "YOUR_API_KEY"

Add proper import of map display framework.
```
import TomTomSDKMapDisplay
```
There are several ways to create a MapView object. One of them is to use the initializer without parameters. If you don’t need to customize the map, you can use the initializer with an auto layout. For a non-autolayout setup and additional customization, see the other initializers.
```
let mapView = MapView()
```
Add the created MapView to the UIViewController view and setup constraints.
```
1view.addSubview(mapView)
2
3mapView.translatesAutoresizingMaskIntoConstraints = false
4NSLayoutConstraint.activate([
5    view.leftAnchor.constraint(equalTo: mapView.leftAnchor),
6    view.rightAnchor.constraint(equalTo: mapView.rightAnchor),
7    view.topAnchor.constraint(equalTo: mapView.topAnchor),
8    view.bottomAnchor.constraint(equalTo: mapView.bottomAnchor),
9])
```
Run the app. You should see the initialized map.

Getting the Map

When the map is fully initialized you can use the TomTomMap object to interact with it. There are three ways to check whether the map is ready to be used.

Using the MapViewDelegate protocol. An object conforming to the protocol receives a call from the MapView(MapView, Map) method with the map as a parameter. To use delegate, do the following:
1. Adopt the MapViewDelegate in the class.
```
1extension ViewController: MapViewDelegate {
2    func mapView(_: MapView, onMapReady map: TomTomMap) {
3        // Store the `Map` object if later map adjustments are necessary
4        self.map = map
5    }
6
7
8    func mapView(_ mapView: MapView, onStyleLoad result: Result<StyleContainer, Error>) {
9        // Based on `result` you can find out if default or style that you are trying to load succeed or failed.
10    }
11...
12}
```
2. Set the delegate implementation to the MapView.delegate view.
```
mapView.delegate = self
```
Assign a ((Map) → Void) closure to the MapView.onMapReadyCallback property.
```
1mapView.onMapReadyCallback = { (_: TomTomMap) in
2    /* YOUR CODE GOES HERE */
3}
```

Configuring the map

The map can be customized during initialization or after creation by changing individual attributes of the Map property:

To initialize the map with custom parameters, create a MapOptions object and pass it to MapView init(mapOptions:). See the following example.
You can set the configuration after initialization by accessing the Map property and modifying its styleMode, styleContainer, cameraOptions, and other attributes defined in the Map.

1let styleContainer = StyleContainer.defaultStyle
2let amsterdam = CLLocationCoordinate2D(latitude: 52.3764527, longitude: 4.9062047)
3let resourceCachePolicy = OnDiskCachePolicy.cache(
4    duration: Measurement.tt.hours(10),
5    maxSize: Measurement.tt.megabytes(200)
6)
7let cameraUpdate = CameraUpdate(
8    position: amsterdam,
9    zoom: 10.0,
10    tilt: 45,
11    rotation: 0,
12    positionMarkerVerticalOffset: nil
13)
14let mapOptions = MapOptions(
15    mapStyle: styleContainer,
16    apiKey: "YOUR_API_KEY",
17    cameraUpdate: cameraUpdate,
18    cachePolicy: resourceCachePolicy,
19    styleMode: .dark
20)
21mapView = MapView(mapOptions: mapOptions)

MapOptions properties

Property	required/optional	Description
`mapKey`	required	Maps API key.
`cameraOptions`	optional	`CameraUpdate` for a map. Provides position, rotation, tilt, and zoom of the camera. More information can be found in the Camera and animations guide.
`cachePolicy`	optional	Custom `OnDiskCachePolicy` used for caching style and tiles. The `OnDiskCachePolicy.default` configuration sets the cache for 24 hours and a maximum of 100Mb. If you do not want to cache any information about the map, use the `OnDiskCachePolicy.noCaching` property.
`mapStyle`	optional	Custom map style provided as `StyleContainer`. More information about map styling can be found in the Styling the map guide.
`styleMode`	optional	Provides an initial `StyleMode` of the map. The default is the TomTom light style. Read more about `StyleMode` in the Styling the map guide.

Performance optimization

Caching

To show online maps, the SDK needs to download data over the network (e.g., tiles), and store the already-downloaded data in the file system. Every iOS application has different requirements for network and disk usage, just as it does for what objects are displayed (e.g., roads). And it’s up to the app developer to find the best strategy to use those resources. Since resource demands can vary, the Map SDK provides different caching policies to help to optimize performance for your specific use case.

Map caching can be configured using the OnDiskCachePolicy enum, which you need to provide to the MapOptions object. The Map SDK caches:

map tiles
styles
sprites
fonts

If there is no need to cache anything from the map, use the OnDiskCachePolicy.noCaching value. Otherwise, custom settings can be applied using the OnDiskCachePolicy.cache(TimeInterval, UInt). It requires two parameters:

Maximum time that fetched resources can stay in the cache.
Maximum size of the cache in megabytes.

By default, the cache size limit is set to 100MB and the lifetime duration to 24 hours.

The server can influence the way caching operates and for example forbid caching.