TileStore

 
extension TileStore

  • Returns a shared TileStore instance at the default location. Creates a new one if one doesn’t yet exist.

    See

    See Also: shared(for:)

    Declaration

    Swift

    public static var `default`: TileStore { get }

  • Gets a TileStore instance for the given storage path. Creates a new one if one doesn’t exist.

    If the given path is empty, the tile store at the default location is returned.

    On iOS, this storage path is excluded from automatic cloud backup.

    Declaration

    Swift

    public static func shared(for filePathURL: URL) -> TileStore

    Parameters

    filePathURL

    The path on disk where tiles and metadata will be stored

    Return Value

    TileStore instance.

  • Loads a new tile region or updates the existing one.

    Creating of a new region requires providing both geometry and tileset descriptors to the given load options, otherwise the load request fails with RegionNotFound error.

    If a tile region with the given id already exists, it gets updated with the values provided to the given load options. The missing resources get loaded and the expired resources get updated.

    If there no values provided to the given load options, the existing tile region gets refreshed: the missing resources get loaded and the expired resources get updated.

    A failed load request can be reattempted with another loadTileRegion() call.

    If there is already a pending loading operation for the tile region with the given id, the pending loading operation will fail with an error of Canceled type.

    Note

    The user-provided callbacks will be executed on a TileStore-controlled worker thread; it is the responsibility of the user to dispatch to a user-controlled thread.

    Important

    By default, users may download up to 250MB of data for offline use without incurring additional charges. This limit is subject to change.

    Declaration

    Swift

    @discardableResult
public func loadTileRegion(forId id: String,
                           loadOptions: TileRegionLoadOptions,
                           progress: TileRegionLoadProgressCallback? = nil,
                           completion: @escaping (Result<TileRegion, Error>) -> Void) -> Cancelable

    Parameters

    id

    The tile region identifier.
    loadOptions

    The tile region load options.
    progress

    Invoked multiple times to report progress of the loading operation. Optional, default is nil.
    completion

    Invoked only once upon success, failure, or cancelation of the loading operation. Any Result error could be of type TileRegionError.

    Return Value

    A Cancelable object to cancel the load request

  • Checks if a tile region with the given id contains all tilesets from all of the given tileset descriptors.

    Note

    The user-provided callbacks will be executed on a TileStore-controlled worker thread; it is the responsibility of the user to dispatch to a user-controlled thread.

    Declaration

    Swift

    public func tileRegionContainsDescriptors(forId id: String,
                                          descriptors: [TilesetDescriptor],
                                          completion: @escaping (Result<Bool, Error>) -> Void)

    Parameters

    id

    The tile region identifier.
    descriptors

    The array of tileset descriptors.
    completion

    The result callback. Any Result error could be of type TileRegionError.

  • Fetch the array of the existing tile regions.

    Note

    The user-provided callbacks will be executed on a TileStore-controlled worker thread; it is the responsibility of the user to dispatch to a user-controlled thread.

    Declaration

    Swift

    public func allTileRegions(completion: @escaping (Result<[TileRegion], Error>) -> Void)

    Parameters

    completion

    The result callback. Any Result error should be of type TileRegionError.

  • Returns a tile region given its id.

    Note

    The user-provided callbacks will be executed on a TileStore-controlled worker thread; it is the responsibility of the user to dispatch to a user-controlled thread.

    Declaration

    Swift

    public func tileRegion(forId id: String,
                       completion: @escaping (Result<TileRegion, Error>) -> Void)

    Parameters

    id

    The tile region id.
    completion

    The Result callback. Any Result error could be of type TileRegionError.

  • Fetch a tile region’s associated geometry

    The region associated geometry is provided by the client and it represents the area, which the tile region must cover. The actual regional geometry depends on the tiling scheme and might exceed the associated geometry.

    Note

    The user-provided callbacks will be executed on a TileStore-controlled worker thread; it is the responsibility of the user to dispatch to a user-controlled thread.

    Declaration

    Swift

    public func tileRegionGeometry(forId id: String,
                               completion: @escaping (Result<Geometry, Error>) -> Void)

    Parameters

    id

    The tile region id.
    completion

    The Result closure. Any Result error could be of type TileRegionError.

  • Fetch a tile region’s associated metadata

    The region’s associated metadata that a user previously set for this region.

    Declaration

    Swift

    public func tileRegionMetadata(forId id: String,
                               completion: @escaping (Result<Any, Error>) -> Void)

    Parameters

    id

    The tile region id.
    completion

    The Result closure. Any Result error could be of type TileRegionError.

  • Allows observing a tile store’s activity

    Declaration

    Swift

    public func subscribe(_ observer: TileStoreObserver) -> Cancelable

    Parameters

    observer

    The object to be notified when events occur. TileStore holds a strong reference to this object until the subscription is canceled.

    Return Value

    An object that can be used to cancel the subscription.