• An object conforming to the MGLOfflineRegion protocol determines which resources are required by an MGLOfflinePack object.

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    Declaration

    Objective-C

    @protocol MGLOfflineRegion <NSObject>

    Swift

    protocol MGLOfflineRegion : NSObjectProtocol
  • MGLOfflineStorage implements a singleton (shared object) that manages offline packs and ambient caching. All of this class’s instance methods are asynchronous, reflecting the fact that offline resources are stored in a database. The shared object maintains a canonical collection of offline packs in its packs property.

    Mapbox resources downloaded via this API are subject to separate Vector Tile and Raster Tile API pricing and are not included in the Maps SDK’s “unlimited” requests. See our pricing page for more information.

    See the Download an offline map example to learn how to create and register an offline pack for a defined region.

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    Declaration

    Objective-C

    
    @interface MGLOfflineStorage : NSObject

    Swift

    class MGLOfflineStorage : NSObject
  • An MGLOfflinePack represents a collection of resources necessary for viewing a region offline to a local database.

    To create an instance of MGLOfflinePack, use the +[MGLOfflineStorage addPackForRegion:withContext:completionHandler:] method. A pack created using -[MGLOfflinePack init] is immediately invalid.

    Example

    MGLOfflineStorage.shared.addPack(for: region, withContext: context) { (pack, error) in
        guard let pack = pack else {
            // If adding the pack fails, log an error to console.
            print("Error:", error?.localizedDescription ?? "unknown error adding pack at \(#file)(\(#line)) in \(#function)")
            return
        }
    
        // Start an MGLOfflinePack download
        pack.resume()
    }
    
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    Declaration

    Objective-C

    
    @interface MGLOfflinePack : NSObject

    Swift

    class MGLOfflinePack : NSObject
  • A structure containing information about an offline pack’s current download progress.

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    Declaration

    Objective-C

    struct MGLOfflinePackProgress {}

    Swift

    struct MGLOfflinePackProgress
  • The state an offline pack is currently in.

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    Declaration

    Objective-C

    enum MGLOfflinePackState {}

    Swift

    enum MGLOfflinePackState : Int
  • 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.

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    Declaration

    Objective-C

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

    Swift

    class MGLTilePyramidOfflineRegion : NSObject, MGLOfflineRegion, NSSecureCoding, NSCopying
  • An offline region defined by a style URL, geographic shape, and range of zoom levels.

    Example

    var coordinates = [
        CLLocationCoordinate2D(latitude: 45.522585, longitude: -122.685699),
        CLLocationCoordinate2D(latitude: 45.534611, longitude: -122.708873),
        CLLocationCoordinate2D(latitude: 45.530883, longitude: -122.678833)
    ]
    
    let triangle = MGLPolygon(coordinates: &coordinates, count: UInt(coordinates.count))
    let region = MGLShapeOfflineRegion(styleURL: MGLStyle.lightStyleURL, shape: triangle, fromZoomLevel: 11, toZoomLevel: 14)
    let context = "Triangle Region".data(using: .utf8)
    MGLOfflineStorage.shared.addPack(for: region, withContext: context!)
    

    This class requires fewer resources than MGLTilePyramidOfflineRegion for irregularly shaped regions.

    See more

    Declaration

    Objective-C

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

    Swift

    class MGLShapeOfflineRegion : NSObject, MGLOfflineRegion, NSSecureCoding, NSCopying