MGLTilePyramidOfflineRegion

 

@interface MGLTilePyramidOfflineRegion
    : NSObject <MGLOfflineRegion, NSSecureCoding, NSCopying>

An offline region defined by a style URL, geographic coordinate bounds, and range of zoom levels.

To minimize the resources required by an irregularly shaped offline region, use the MGLShapeOfflineRegion class instead.

Example

let northeast = CLLocationCoordinate2D(latitude: 40.989329, longitude: -102.062592)
let southwest = CLLocationCoordinate2D(latitude: 36.986207, longitude: -109.049896)
let bbox = MGLCoordinateBounds(sw: southwest, ne: northeast)

let region = MGLTilePyramidOfflineRegion(styleURL: MGLStyle.lightStyleURL, bounds: bbox, fromZoomLevel: 11, toZoomLevel: 14)
let context = "Tile Pyramid Region".data(using: .utf8)
MGLOfflineStorage.shared.addPack(for: region, withContext: context!)

See the Download an offline map example to learn how to define an offline region to be downloaded to a user’s device.

  • The coordinate bounds for the geographic region covered by the downloaded tiles.

    Declaration

    Objective-C

    @property (nonatomic, readonly) MGLCoordinateBounds bounds;

    Swift

    var bounds: MGLCoordinateBounds { get }
    View Source on GitHub

  • The minimum zoom level for which to download tiles and other resources.

    For more information about zoom levels, -[MGLMapView zoomLevel].

    Declaration

    Objective-C

    @property (nonatomic, readonly) double minimumZoomLevel;

    Swift

    var minimumZoomLevel: Double { get }
    View Source on GitHub

  • The maximum zoom level for which to download tiles and other resources.

    For more information about zoom levels, -[MGLMapView zoomLevel].

    Declaration

    Objective-C

    @property (nonatomic, readonly) double maximumZoomLevel;

    Swift

    var maximumZoomLevel: Double { get }
    View Source on GitHub

  • Initializes a newly created offline region with the given style URL, geographic coordinate bounds, and range of zoom levels.

    This is the designated initializer for MGLTilePyramidOfflineRegion.

    Declaration

    Objective-C

    - (nonnull instancetype)initWithStyleURL:(nullable NSURL *)styleURL
                                  bounds:(MGLCoordinateBounds)bounds
                           fromZoomLevel:(double)minimumZoomLevel
                             toZoomLevel:(double)maximumZoomLevel;

    Swift

    init(styleURL: URL?, bounds: MGLCoordinateBounds, fromZoomLevel minimumZoomLevel: Double, toZoomLevel maximumZoomLevel: Double)

    Parameters

    styleURL

    URL of the map style for which to download resources. The URL may be a full HTTP or HTTPS URL or a canonical style URL. Specify nil for the default style. Relative file URLs cannot be used as offline style URLs. To download the online resources required by a local style, specify a URL to an online copy of the style.
    bounds

    The coordinate bounds for the geographic region to be covered by the downloaded tiles.
    minimumZoomLevel

    The minimum zoom level to be covered by the downloaded tiles. This parameter should be set to at least 0 but no greater than the value of the maximumZoomLevel parameter. For each required tile source, if this parameter is set to a value less than the tile source’s minimum zoom level, the download covers zoom levels down to the tile source’s minimum zoom level.
    maximumZoomLevel

    The maximum zoom level to be covered by the downloaded tiles. This parameter should be set to at least the value of the minimumZoomLevel parameter. For each required tile source, if this parameter is set to a value greater than the tile source’s minimum zoom level, the download covers zoom levels up to the tile source’s maximum zoom level.
    View Source on GitHub