Other Constants

The following constants are available globally.

MGLFontNamesAttribute

The font name string array expression used to format the text.

Declaration

Objective-C

extern const MGLAttributedExpressionKey _Nonnull MGLFontNamesAttribute

Swift

static let fontNamesAttribute: MGLAttributedExpressionKey

MGLFontScaleAttribute

The font scale number expression relative to MGLSymbolStyleLayer.textFontSize used to format the text.

Declaration

Objective-C

extern const MGLAttributedExpressionKey _Nonnull MGLFontScaleAttribute

Swift

static let fontScaleAttribute: MGLAttributedExpressionKey

MGLFontColorAttribute

The font color expression used to format the text.

Declaration

Objective-C

extern const MGLAttributedExpressionKey _Nonnull MGLFontColorAttribute

Swift

static let fontColorAttribute: MGLAttributedExpressionKey

MGLClusterIdentifierInvalid

An NSUInteger constant used to indicate an invalid cluster identifier. This indicates a missing cluster feature.

Declaration

Objective-C

extern const NSUInteger MGLClusterIdentifierInvalid

Swift

let MGLClusterIdentifierInvalid: UInt

MGLShapeSourceOptionWrapsCoordinates

An NSNumber object containing a Boolean value; specifies whether the shape of an MGLComputedShapeSource should be wrapped to accomodate coordinates with longitudes beyond −180 and 180. The default value is NO.

Setting this option to YES affects rendering performance.

This option is used with the MGLComputedShapeSource class; it is ignored when creating an MGLShapeSource object.

Declaration

Objective-C

extern const MGLShapeSourceOption _Nonnull MGLShapeSourceOptionWrapsCoordinates

Swift

static let wrapsCoordinates: MGLShapeSourceOption

MGLShapeSourceOptionClipsCoordinates

An NSNumber object containing a Boolean value; specifies whether the shape of an MGLComputedShapeSource should be clipped at the edge of each tile. The default value is NO.

Setting this option to YES affects rendering performance. Use this option to clip MGLPolylines and MGLPolygons at tile boundaries without artifacts.

This option is used with the MGLComputedShapeSource class; it is ignored when creating an MGLShapeSource object.

Declaration

Objective-C

extern const MGLShapeSourceOption _Nonnull MGLShapeSourceOptionClipsCoordinates

Swift

static let clipsCoordinates: MGLShapeSourceOption

MGLOfflinePackProgressChangedNotification

Posted by the shared MGLOfflineStorage object when an MGLOfflinePack object’s progress changes. The progress may change due to a resource being downloaded or because the pack discovers during the download that more resources are required for offline viewing. This notification is posted whenever any field in the progress property changes.

The object is the MGLOfflinePack object whose progress changed. The userInfo dictionary contains the pack’s current state in the MGLOfflinePackUserInfoKeyState key and details about the pack’s current progress in the MGLOfflinePackUserInfoKeyProgress key. You may also consult the MGLOfflinePack.state and MGLOfflinePack.progress properties, which provide the same values.

If you only need to observe changes in a particular pack’s progress, you can alternatively observe KVO change notifications to the pack’s progress key path.

Declaration

Objective-C

extern const NSNotificationName _Nonnull MGLOfflinePackProgressChangedNotification

Swift

static let MGLOfflinePackProgressChanged: NSNotification.Name

MGLOfflinePackErrorNotification

Posted by the shared MGLOfflineStorage object whenever an MGLOfflinePack object encounters an error while downloading. The error may be recoverable and may not warrant the user’s attention. For example, the pack’s implementation may attempt to re-request failed resources based on an exponential backoff strategy or upon the restoration of network access.

The object is the MGLOfflinePack object that encountered the error. The userInfo dictionary contains the error object in the MGLOfflinePackUserInfoKeyError key.

Declaration

Objective-C

extern const NSNotificationName _Nonnull MGLOfflinePackErrorNotification

Swift

static let MGLOfflinePackError: NSNotification.Name

MGLOfflinePackMaximumMapboxTilesReachedNotification

Posted by the shared MGLOfflineStorage object when the maximum number of hosted tiles has been downloaded and stored on the current device.

The object is the MGLOfflinePack object that reached the tile limit in the course of downloading. The userInfo dictionary contains the tile limit in the MGLOfflinePackUserInfoKeyMaximumCount key.

Once this limit is reached, no instance of MGLOfflinePack can download additional tiles from APIs until already downloaded tiles are removed by calling the -[MGLOfflineStorage removePack:withCompletionHandler:] method.

Declaration

Objective-C

extern const NSNotificationName _Nonnull MGLOfflinePackMaximumMapboxTilesReachedNotification

Swift

static let MGLOfflinePackMaximumMapboxTilesReached: NSNotification.Name

MGLOfflinePackUserInfoKeyState

The key for an NSNumber object that indicates an offline pack’s current state. This key is used in the userInfo dictionary of an MGLOfflinePackProgressChangedNotification notification. Call -integerValue on the object to receive the MGLOfflinePackState-typed state.

Declaration

Objective-C

extern const MGLOfflinePackUserInfoKey _Nonnull MGLOfflinePackUserInfoKeyState

Swift

static let state: MGLOfflinePackUserInfoKey

MGLOfflinePackUserInfoKeyProgress

The key for an NSValue object that indicates an offline pack’s current progress. This key is used in the userInfo dictionary of an MGLOfflinePackProgressChangedNotification notification. Call -MGLOfflinePackProgressValue on the object to receive the MGLOfflinePackProgress-typed progress.

Declaration

Objective-C

extern const MGLOfflinePackUserInfoKey _Nonnull MGLOfflinePackUserInfoKeyProgress

Swift

static let progress: MGLOfflinePackUserInfoKey

MGLOfflinePackUserInfoKeyError

The key for an NSError object that is encountered in the course of downloading an offline pack. This key is used in the userInfo dictionary of an MGLOfflinePackErrorNotification notification. The error’s domain is MGLErrorDomain. See MGLErrorCode for possible error codes.

Declaration

Objective-C

extern const MGLOfflinePackUserInfoKey _Nonnull MGLOfflinePackUserInfoKeyError

Swift

static let error: MGLOfflinePackUserInfoKey

MGLOfflinePackUserInfoKeyMaximumCount

The key for an NSNumber object that indicates the maximum number of hosted tiles that may be downloaded and stored on the current device. This key is used in the userInfo dictionary of an MGLOfflinePackMaximumMapboxTilesReachedNotification notification. Call -unsignedLongLongValue on the object to receive the uint64_t-typed tile limit.

Declaration

Objective-C

extern const MGLOfflinePackUserInfoKey _Nonnull MGLOfflinePackUserInfoKeyMaximumCount

Swift

static let maximumCount: MGLOfflinePackUserInfoKey

MGLTileSourceOptionDEMEncoding

An NSNumber object containing an unsigned integer that specifies the encoding formula for raster-dem tilesets. The integer corresponds to one of the constants described in MGLDEMEncoding.

The default value for this option is MGLDEMEncodingMapbox.

This option cannot be represented in a TileJSON or style JSON file. It is used with the MGLRasterDEMSource class and is ignored when creating an MGLRasterTileSource or MGLVectorTileSource object.

Declaration

Objective-C

extern const MGLTileSourceOption MGLTileSourceOptionDEMEncoding

Swift

static let demEncoding: MGLTileSourceOption

MGLTileSourceOptionTileSize

An NSNumber object containing a floating-point number that specifies the width and height (measured in points) at which the map displays each raster image tile when the map’s zoom level is an integer. The raster tile source scales its images up or down when the map’s zoom level falls between two integers.

The default value for this option is 512. Some providers require a value of 256, as do many third-party tile servers, so consult your provider’s documentation for the correct value.

This option is only applicable to MGLRasterTileSource objects; it is ignored when initializing MGLVectorTileSource objects.

Declaration

Objective-C

extern const MGLTileSourceOption _Nonnull MGLTileSourceOptionTileSize

Swift

static let tileSize: MGLTileSourceOption

MGLShapeSourceOptionClustered

An NSNumber object containing a Boolean enabling or disabling clustering. If the shape property contains point shapes, setting this option to YES clusters the points by radius into groups. The default value is NO.

This option corresponds to the cluster source property in the GL Style Specification.

This option only affects point features within an MGLShapeSource object; it is ignored when creating an MGLComputedShapeSource object.

Declaration

Objective-C

extern const MGLShapeSourceOption _Nonnull MGLShapeSourceOptionClustered

Swift

static let clustered: MGLShapeSourceOption

MGLShapeSourceOptionClusterRadius

An NSNumber object containing an integer; specifies the radius of each cluster if clustering is enabled. A value of 512 produces a radius equal to the width of a tile. The default value is 50.

This option only affects point features within an MGLShapeSource object; it is ignored when creating an MGLComputedShapeSource object.

Declaration

Objective-C

extern const MGLShapeSourceOption _Nonnull MGLShapeSourceOptionClusterRadius

Swift

static let clusterRadius: MGLShapeSourceOption

MGLShapeSourceOptionClusterProperties

An NSDictionary object where the key is an NSString. The dictionary key will be the feature attribute key. The resulting attribute value is aggregated from the clustered points. The dictionary value is an NSArray consisting of two NSExpression objects.

The first object determines how the attribute values are accumulated from the cluster points. It is an NSExpression with an expression function that accepts two or more arguments, such as sum or max. The arguments should be featureAccumulated and the previously defined feature attribute key. The resulting value is assigned to the specified attribute key.

The second NSExpression in the array determines which attribute values are accessed from individual features within a cluster.

let firstExpression = NSExpression(format: "sum:({$featureAccumulated, sumValue})")
let secondExpression = NSExpression(forKeyPath: "magnitude")
let clusterPropertiesDictionary = ["sumValue" : [firstExpression, secondExpression]]

let options : [MGLShapeSourceOption : Any] = [.clustered : true,
                                       .clusterProperties: clusterPropertiesDictionary]

This option corresponds to the clusterProperties source property in the GL Style Specification.

This option only affects point features within an MGLShapeSource object; it is ignored when creating an MGLComputedShapeSource object.

Declaration

Objective-C

extern const MGLShapeSourceOption _Nonnull MGLShapeSourceOptionClusterProperties

Swift

static let clusterProperties: MGLShapeSourceOption

MGLShapeSourceOptionMaximumZoomLevelForClustering

An NSNumber object containing an integer; specifies the maximum zoom level at which to cluster points if clustering is enabled. Defaults to one zoom level less than the value of MGLShapeSourceOptionMaximumZoomLevel so that, at the maximum zoom level, the shapes are not clustered.

This option corresponds to the clusterMaxZoom source property in the GL Style Specification.

This option only affects point features within an MGLShapeSource object; it is ignored when creating an MGLComputedShapeSource object.

Declaration

Objective-C

extern const MGLShapeSourceOption _Nonnull MGLShapeSourceOptionMaximumZoomLevelForClustering

Swift

static let maximumZoomLevelForClustering: MGLShapeSourceOption

MGLShapeSourceOptionMinimumZoomLevel

An NSNumber object containing an integer; specifies the minimum zoom level at which to create vector tiles. The default value is 0.

This option corresponds to the minzoom source property in the GL Style Specification.

Declaration

Objective-C

extern const MGLShapeSourceOption _Nonnull MGLShapeSourceOptionMinimumZoomLevel

Swift

static let minimumZoomLevel: MGLShapeSourceOption

MGLShapeSourceOptionMaximumZoomLevel

An NSNumber object containing an integer; specifies the maximum zoom level at which to create vector tiles. A greater value produces greater detail at high zoom levels. The default value is 18.

This option corresponds to the maxzoom source property in the GL Style Specification.

Declaration

Objective-C

extern const MGLShapeSourceOption _Nonnull MGLShapeSourceOptionMaximumZoomLevel

Swift

static let maximumZoomLevel: MGLShapeSourceOption

MGLShapeSourceOptionBuffer

An NSNumber object containing an integer; specifies the size of the tile buffer on each side. A value of 0 produces no buffer. A value of 512 produces a buffer as wide as the tile itself. Larger values produce fewer rendering artifacts near tile edges and slower performance. The default value is 128.

This option corresponds to the buffer source property in the GL Style Specification.

Declaration

Objective-C

extern const MGLShapeSourceOption _Nonnull MGLShapeSourceOptionBuffer

Swift

static let buffer: MGLShapeSourceOption

MGLShapeSourceOptionSimplificationTolerance

An NSNumber object containing a double; specifies the Douglas-Peucker simplification tolerance. A greater value produces simpler geometries and improves performance. The default value is 0.375.

This option corresponds to the tolerance source property in the GL Style Specification.

Declaration

Objective-C

extern const MGLShapeSourceOption _Nonnull MGLShapeSourceOptionSimplificationTolerance

Swift

static let simplificationTolerance: MGLShapeSourceOption

MGLShapeSourceOptionLineDistanceMetrics

An NSNumber object containing a Boolean enabling or disabling calculating line distance metrics.

Set this property to YES in order for the MGLLineStyleLayer.lineGradient property to have its intended effect. The default value is NO.

This option corresponds to the lineMetrics source property in the GL Style Specification.

Declaration

Objective-C

extern const MGLShapeSourceOption _Nonnull MGLShapeSourceOptionLineDistanceMetrics

Swift

static let lineDistanceMetrics: MGLShapeSourceOption

MGLStyleDefaultVersion

A version number identifying the default version of the Streets style obtained through the MGLStyle.streetsStyleURL method. This version number may also be passed into the +[MGLStyle streetsStyleURLWithVersion:] method.

The value of this constant generally corresponds to the latest released version as of the date on which this SDK was published. You can use this constant to ascertain the style used by MGLMapView and MGLTilePyramidOfflineRegion when no style URL is specified. Consult the Styles API documentation for the most up-to-date style versioning information.

Warning

The value of this constant may change in a future release of the SDK. If you use any feature that depends on a specific aspect of a default style — for instance, the minimum zoom level that includes roads — you may use the current value of this constant or the underlying style URL, but do not use the constant itself. Such details may change significantly from version to version.

Declaration

Objective-C

static const NSInteger MGLStyleDefaultVersion = 11

Swift

let MGLStyleDefaultVersion: Int

MGLTileSourceOptionMinimumZoomLevel

An NSNumber object containing an unsigned integer that specifies the minimum zoom level at which to display tiles from the source.

The value should be between 0 and 22, inclusive, and less than MGLTileSourceOptionMaximumZoomLevel, if specified. The default value for this option is 0.

This option corresponds to the minzoom key in the TileJSON specification.

Declaration

Objective-C

extern const MGLTileSourceOption _Nonnull MGLTileSourceOptionMinimumZoomLevel

Swift

static let minimumZoomLevel: MGLTileSourceOption

MGLTileSourceOptionMaximumZoomLevel

An NSNumber object containing an unsigned integer that specifies the maximum zoom level at which to display tiles from the source.

The value should be between 0 and 22, inclusive, and less than MGLTileSourceOptionMinimumZoomLevel, if specified. The default value for this option is 22.

This option corresponds to the maxzoom key in the TileJSON specification.

Declaration

Objective-C

extern const MGLTileSourceOption _Nonnull MGLTileSourceOptionMaximumZoomLevel

Swift

static let maximumZoomLevel: MGLTileSourceOption

MGLTileSourceOptionCoordinateBounds

An NSValue object containing an MGLCoordinateBounds struct that specifies the geographic extent of the source.

If this option is specified, the SDK avoids requesting any tile that falls outside of the coordinate bounds. Otherwise, the SDK requests any tile needed to cover the viewport, as it does by default.

This option corresponds to the bounds key in the TileJSON specification.

Declaration

Objective-C

extern const MGLTileSourceOption _Nonnull MGLTileSourceOptionCoordinateBounds

Swift

static let coordinateBounds: MGLTileSourceOption

MGLTileSourceOptionAttributionHTMLString

An HTML string defining the buttons to be displayed in an action sheet when the source is part of a map view’s style and the map view’s attribution button is pressed.

By default, no attribution statements are displayed. If the MGLTileSourceOptionAttributionInfos option is specified, this option is ignored.

This option corresponds to the attribution key in the TileJSON specification.

Declaration

Objective-C

extern const MGLTileSourceOption _Nonnull MGLTileSourceOptionAttributionHTMLString

Swift

static let attributionHTMLString: MGLTileSourceOption

MGLTileSourceOptionAttributionInfos

An array of MGLAttributionInfo objects defining the buttons to be displayed in an action sheet when the source is part of a map view’s style and the map view’s attribution button is pressed.

By default, no attribution statements are displayed.

Declaration

Objective-C

extern const MGLTileSourceOption _Nonnull MGLTileSourceOptionAttributionInfos

Swift

static let attributionInfos: MGLTileSourceOption

MGLTileSourceOptionTileCoordinateSystem

An NSNumber object containing an unsigned integer that specifies the tile coordinate system for the source’s tile URLs. The integer corresponds to one of the constants described in MGLTileCoordinateSystem.

The default value for this option is MGLTileCoordinateSystemXYZ.

This option corresponds to the scheme key in the TileJSON specification.

Declaration

Objective-C

extern const MGLTileSourceOption _Nonnull MGLTileSourceOptionTileCoordinateSystem

Swift

static let tileCoordinateSystem: MGLTileSourceOption

MGLErrorDomain

Indicates an error occurred in the SDK.

Declaration

Objective-C

extern const NSErrorDomain _Nonnull MGLErrorDomain

Swift

let MGLErrorDomain: String

MGLExpressionInterpolationModeLinear

An NSString identifying the linear interpolation type in an NSExpression.

This attribute corresponds to the linear value in the interpolate expression operator in the GL Style Specification.

Declaration

Objective-C

extern const MGLExpressionInterpolationMode _Nonnull MGLExpressionInterpolationModeLinear

Swift

static let linear: MGLExpressionInterpolationMode

MGLExpressionInterpolationModeExponential

An NSString identifying the expotential interpolation type in an NSExpression.

This attribute corresponds to the exponential value in the interpolate expression operator in the GL Style Specification.

Declaration

Objective-C

extern const MGLExpressionInterpolationMode _Nonnull MGLExpressionInterpolationModeExponential

Swift

static let exponential: MGLExpressionInterpolationMode

MGLExpressionInterpolationModeCubicBezier

An NSString identifying the cubic-bezier interpolation type in an NSExpression.

This attribute corresponds to the cubic-bezier value in the interpolate expression operator in the GL Style Specification.

Declaration

Objective-C

extern const MGLExpressionInterpolationMode _Nonnull MGLExpressionInterpolationModeCubicBezier

Swift

static let cubicBezier: MGLExpressionInterpolationMode

MGLMapViewDecelerationRateNormal

The default deceleration rate for a map view.

Declaration

Objective-C

extern const MGLMapViewDecelerationRate MGLMapViewDecelerationRateNormal

Swift

static let normal: MGLMapViewDecelerationRate

MGLMapViewDecelerationRateFast

A fast deceleration rate for a map view.

Declaration

Objective-C

extern const MGLMapViewDecelerationRate MGLMapViewDecelerationRateFast

Swift

static let fast: MGLMapViewDecelerationRate

MGLMapViewDecelerationRateImmediate

Disables deceleration in a map view.

Declaration

Objective-C

extern const MGLMapViewDecelerationRate MGLMapViewDecelerationRateImmediate

Swift

static let immediate: MGLMapViewDecelerationRate

MGLMapViewPreferredFramesPerSecondDefault

The default frame rate. This can be either 30 FPS or 60 FPS, depending on device capabilities.

Declaration

Objective-C

extern const MGLMapViewPreferredFramesPerSecond
MGLMapViewPreferredFramesPerSecondDefault

Swift

static let `default`: MGLMapViewPreferredFramesPerSecond

MGLMapViewPreferredFramesPerSecondLowPower

A conservative frame rate; typically 30 FPS.

Declaration

Objective-C

extern const MGLMapViewPreferredFramesPerSecond
MGLMapViewPreferredFramesPerSecondLowPower

Swift

static let lowPower: MGLMapViewPreferredFramesPerSecond

MGLMapViewPreferredFramesPerSecondMaximum

The maximum supported frame rate; typically 60 FPS.

Declaration

Objective-C

extern const MGLMapViewPreferredFramesPerSecond
MGLMapViewPreferredFramesPerSecondMaximum

Swift

static let maximum: MGLMapViewPreferredFramesPerSecond

MapboxVersionNumber

Project version number.

Declaration

Objective-C

extern double MapboxVersionNumber

Swift

var MapboxVersionNumber: Double

MapboxVersionString

Project version string.

Declaration

Objective-C

extern const unsigned char MapboxVersionString[]