MLNVectorTileSource class

MLNVectorTileSource is a map content source that supplies tiled vector data in Mapbox Vector Tile format to be shown on the map. The location of and metadata about the tiles are defined either by an option dictionary or by an external file that conforms to the TileJSON specification. A vector tile source is added to an MLNStyle object along with one or more MLNVectorStyleLayer objects. A vector style layer defines the appearance of any content supplied by the vector tile source.

MLNVectorTileSource is optimized for data sets that are too large to fit completely in memory, such as vector tile sets or data sets managed in Mapbox Studio. For GeoJSON data, use the MLNShapeSource class. For tiled data that changes dynamically, the MLNComputedShapeSource class may be a suitable alternative.

Each vector source defined by the style JSON file is represented at runtime by an MLNVectorTileSource object that you can use to initialize new style layers. You can also add and remove sources dynamically using methods such as MLNStyle/addSource: and MLNStyle/sourceWithIdentifier:.

Within each vector tile, each geometric coordinate must lie between −1 × extent and (extent × 2) − 1, inclusive. Any vector style layer initialized with a vector tile source must have a non-nil value in its sourceLayerIdentifier property.

Commonly used vector tile sources include Mapbox Streets, Mapbox Terrain, and Mapbox Traffic.

Example

let source = MLNVectorTileSource(identifier: "pois", tileURLTemplates:
["https://example.com/vector-tiles/{z}/{x}/{y}.mvt"], options: [ .minimumZoomLevel: 9,
.maximumZoomLevel: 16,
.attributionInfos: [
MLNAttributionInfo(title: NSAttributedString(string: "© Mapbox"), url: URL(string:
"https://mapbox.com"))
]
])
mapView.style?.addSource(source)

Related examples

TODO: Data-driven circles, learn how to add data to your map using an MLNVectorTileSource object.