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NSExpression(MGLAdditions)

@interface NSExpression (MGLAdditions)

Methods for creating expressions that use Mapbox-specific functionality and for converting to and from the JSON format defined in the Mapbox Style Specification.

Creating Variable Expressions

zoomLevelVariableExpression
NSExpression variable that corresponds to the zoom expression operator in the Mapbox Style Specification.
Declaration
Objective-C

@property (class, nonatomic, readonly) NSExpression *_Nonnull zoomLevelVariableExpression;
Swift

class var zoomLevelVariable: NSExpression { get }
View Source on GitHub
heatmapDensityVariableExpression
NSExpression variable that corresponds to the heatmap-density expression operator in the Mapbox Style Specification.
Declaration
Objective-C

@property (class, nonatomic, readonly) NSExpression *_Nonnull heatmapDensityVariableExpression;
Swift

class var heatmapDensityVariable: NSExpression { get }
View Source on GitHub
lineProgressVariableExpression
NSExpression variable that corresponds to the line-progress expression operator in the Mapbox Style Specification.
Declaration
Objective-C

@property (class, nonatomic, readonly) NSExpression *_Nonnull lineProgressVariableExpression;
Swift

class var lineProgressVariable: NSExpression { get }
View Source on GitHub
geometryTypeVariableExpression
NSExpression variable that corresponds to the geometry-type expression operator in the Mapbox Style Specification.
Declaration
Objective-C

@property (class, nonatomic, readonly) NSExpression *_Nonnull geometryTypeVariableExpression;
Swift

class var geometryTypeVariable: NSExpression { get }
View Source on GitHub
featureIdentifierVariableExpression
NSExpression variable that corresponds to the id expression operator in the Mapbox Style Specification.
Declaration
Objective-C

@property (class, nonatomic, readonly) NSExpression *_Nonnull featureIdentifierVariableExpression;
Swift

class var featureIdentifierVariable: NSExpression { get }
View Source on GitHub
featureAccumulatedVariableExpression
NSExpression variable that corresponds to the id expression operator in the Mapbox Style Specification.
Declaration
Objective-C

@property (class, nonatomic, readonly) NSExpression *_Nonnull featureAccumulatedVariableExpression;
Swift

class var featureAccumulatedVariable: NSExpression { get }
View Source on GitHub
featureAttributesVariableExpression
NSExpression variable that corresponds to the properties expression operator in the Mapbox Style Specification.
Declaration
Objective-C

@property (class, nonatomic, readonly) NSExpression *_Nonnull featureAttributesVariableExpression;
Swift

class var featureAttributesVariable: NSExpression { get }
View Source on GitHub

Creating Conditional Expressions

+mgl_expressionForConditional:trueExpression:falseExpresssion:

Returns a conditional function expression specifying the string predicate, and expressions for each condition.

Declaration

Objective-C

+ (nonnull instancetype)
              mgl_expressionForConditional:(nonnull NSPredicate *)conditionPredicate
                            trueExpression:(nonnull NSExpression *)trueExpression
                          falseExpresssion:(nonnull NSExpression *)falseExpression;

Swift

convenience init(forMGLConditional conditionPredicate: NSPredicate, trueExpression: NSExpression, falseExpression: NSExpression)

Parameters

`conditionPredicate`	The predicate to get evaluated.
`trueExpression`	The expression for conditions equal to true.
`falseExpression`	The expression for conditions equal to false.

View Source on GitHub

Creating Ramp, Scale, and Curve Expressions

+mgl_expressionForSteppingExpression:fromExpression:stops:

Returns a step function expression specifying the stepping, from expression and stops.

See the Data-driven circles, Cluster point data, and Use images to cluster point data examples to learn how to use this expression to style a map layer based on an attribute value.

Declaration

Objective-C

+ (nonnull instancetype)
              mgl_expressionForSteppingExpression:
                  (nonnull NSExpression *)steppingExpression
                                   fromExpression:
                                       (nonnull NSExpression *)minimumExpression
                                            stops:(nonnull NSExpression *)stops;

Swift

convenience init(forMGLStepping steppingExpression: NSExpression, from minimumExpression: NSExpression, stops: NSExpression)

Parameters

`steppingExpression`	The stepping expression.
`minimumExpression`	The expression which could be a constant or function expression.
`stops`	The stops must be an `NSDictionary` constant `NSExpression`.

View Source on GitHub

+mgl_expressionForInterpolatingExpression:withCurveType:parameters:stops:

Returns an interpolated function expression specifying the function operator, curve type, parameters and steps.

See the Create a heatmap layer example to learn how to style an MGLHeatmapStyleLayer based on zoom level and point density with this expression.

Declaration

Objective-C

+ (nonnull instancetype)
              mgl_expressionForInterpolatingExpression:
                  (nonnull NSExpression *)inputExpression
                                         withCurveType:
                                             (nonnull MGLExpressionInterpolationMode)
                                                 curveType
                                            parameters:(nullable NSExpression *)parameters
                                                 stops:(nonnull NSExpression *)stops;

Swift

convenience init(forMGLInterpolating inputExpression: NSExpression, curveType: MGLExpressionInterpolationMode, parameters: NSExpression?, stops: NSExpression)

Parameters

`inputExpression`	The interpolating expression input.
`curveType`	The curve type could be `MGLExpressionInterpolationModeLinear`, `MGLExpressionInterpolationModeExponential` and `MGLExpressionInterpolationModeCubicBezier`.
`parameters`	The parameters expression.
`stops`	The stops expression.

View Source on GitHub

+mgl_expressionForMatchingExpression:inDictionary:defaultExpression:

Returns a match function expression specifying the input, matching values, and default value.

Declaration

Objective-C

+ (nonnull instancetype)
              mgl_expressionForMatchingExpression:(nonnull NSExpression *)inputExpression
                                     inDictionary:(nonnull NSDictionary<NSExpression *,
                                                                        NSExpression *> *)
                                                      matchedExpressions
                                defaultExpression:
                                    (nonnull NSExpression *)defaultExpression;

Swift

convenience init(forMGLMatchingKey inputExpression: NSExpression, in matchedExpressions: [NSExpression : NSExpression], default defaultExpression: NSExpression)

Parameters

`inputExpression`	The matching expression.
`matchedExpressions`	The matched values expression dictionary must be condition : value.
`defaultExpression`	The defaultValue expression to be used in case there is no match.

View Source on GitHub

+mgl_expressionForAttributedExpressions:

Returns an attributed function expression specifying an MGLAttributedExpression constant expression array.

Declaration

Objective-C

+ (nonnull instancetype)mgl_expressionForAttributedExpressions:
              (nonnull NSArray<NSExpression *> *)attributedExpressions;

Swift

convenience init(forAttributedExpressions attributedExpressions: [NSExpression])

Parameters


                                            attributedExpressions

The MGLAttributedExpression constant expression array.

View Source on GitHub

Concatenating String Expressions

-mgl_expressionByAppendingExpression:

Returns a constant expression appending the passed expression.

Note

Both the receiver and the given expression must be an NSString constant expression type; otherwise, an exception is rised.

Declaration

Objective-C

- (nonnull instancetype)mgl_expressionByAppendingExpression:
              (nonnull NSExpression *)expression;

Swift

func mgl_appending(_ expression: NSExpression) -> Self

Parameters


                                            expression

The expression to append to the receiver.

View Source on GitHub

Converting JSON Expressions

+expressionWithMGLJSONObject:

Returns an expression equivalent to the given Foundation object deserialized from JSON data.

The Foundation object is interpreted according to the Mapbox Style Specification. See the “Information for Style Authors” guide for a correspondence of operators and types between the style specification and the NSExpression representation used by this SDK.

Declaration

Objective-C

+ (nonnull instancetype)expressionWithMGLJSONObject:(nonnull id)object;

Swift

convenience init(mglJSONObject object: Any)

Parameters


                                            object

A Foundation object deserialized from JSON data, for example using NSJSONSerialization.

Return Value

An initialized expression equivalent to object, suitable for use as the value of a style layer attribute.

View Source on GitHub

mgl_jsonExpressionObject
An equivalent Foundation object that can be serialized as JSON.

The Foundation object conforms to the Mapbox Style Specification. See the “Information for Style Authors” guide for a correspondence of operators and types between the style specification and the NSExpression representation used by this SDK.

You can use NSJSONSerialization to serialize the Foundation object as data to write to a file.
Declaration
Objective-C

@property (nonatomic, readonly) id _Nonnull mgl_jsonExpressionObject;
Swift

var mgl_jsonExpressionObject: Any { get }
View Source on GitHub

Localizing the Expression

-mgl_expressionLocalizedIntoLocale:

Returns a copy of the receiver localized into the given locale.

This method assumes the receiver refers to the feature attributes that are available in vector tiles supplied by the Mapbox Streets source. On iOS, the user can set the system’s preferred language in Settings, General Settings, Language & Region. On macOS, the user can set the system’s preferred language in the Language & Region pane of System Preferences.

Declaration

Objective-C

- (nonnull NSExpression *)mgl_expressionLocalizedIntoLocale:
              (nullable NSLocale *)locale;

Swift

func mgl_expressionLocalized(into locale: Locale?) -> NSExpression

Parameters


                                            locale

The locale into which labels should be localized. To use the system’s preferred language, if supported, specify nil. To use the local language, specify a locale with the identifier mul.

View Source on GitHub

NSValue(MGLAdditions)

@interface NSValue (MGLAdditions)

Methods for round-tripping values for Mapbox-defined types.

Working with Geographic Coordinate Values

+valueWithMGLCoordinate:

Creates a new value object containing the specified Core Location geographic coordinate structure.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLCoordinate:
              (CLLocationCoordinate2D)coordinate;

Swift

convenience init(mglCoordinate coordinate: CLLocationCoordinate2D)

Parameters


                                            coordinate

The value for the new object.

Return Value

A new value object that contains the geographic coordinate information.

View Source on GitHub

MGLCoordinateValue
The Core Location geographic coordinate structure representation of the value.
Declaration
Objective-C

@property (readonly) CLLocationCoordinate2D MGLCoordinateValue;
Swift

var mglCoordinateValue: CLLocationCoordinate2D { get }
View Source on GitHub

+valueWithMGLMapPoint:

Creates a new value object containing the specified Mapbox map point structure.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLMapPoint:(MGLMapPoint)point;

Swift

convenience init(mglMapPoint point: MGLMapPoint)

Parameters


                                            point

The value for the new object.

Return Value

A new value object that contains the coordinate and zoom level information.

View Source on GitHub

MGLMapPointValue
The Mapbox map point structure representation of the value.
Declaration
Objective-C

@property (readonly) MGLMapPoint MGLMapPointValue;
Swift

var mglMapPointValue: MGLMapPoint { get }
View Source on GitHub

+valueWithMGLCoordinateSpan:

Creates a new value object containing the specified Mapbox coordinate span structure.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLCoordinateSpan:(MGLCoordinateSpan)span;

Swift

convenience init(mglCoordinateSpan span: MGLCoordinateSpan)

Parameters


                                            span

The value for the new object.

Return Value

A new value object that contains the coordinate span information.

View Source on GitHub

MGLCoordinateSpanValue
The Mapbox coordinate span structure representation of the value.
Declaration
Objective-C

@property (readonly) MGLCoordinateSpan MGLCoordinateSpanValue;
Swift

var mglCoordinateSpanValue: MGLCoordinateSpan { get }
View Source on GitHub

+valueWithMGLCoordinateBounds:

Creates a new value object containing the specified Mapbox coordinate bounds structure.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLCoordinateBounds:
              (MGLCoordinateBounds)bounds;

Swift

convenience init(mglCoordinateBounds bounds: MGLCoordinateBounds)

Parameters


                                            bounds

The value for the new object.

Return Value

A new value object that contains the coordinate bounds information.

View Source on GitHub

MGLCoordinateBoundsValue
The Mapbox coordinate bounds structure representation of the value.
Declaration
Objective-C

@property (readonly) MGLCoordinateBounds MGLCoordinateBoundsValue;
Swift

var mglCoordinateBoundsValue: MGLCoordinateBounds { get }
View Source on GitHub

+valueWithMGLCoordinateQuad:

Creates a new value object containing the specified Mapbox coordinate quad structure.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLCoordinateQuad:(MGLCoordinateQuad)quad;

Swift

convenience init(mglCoordinateQuad quad: MGLCoordinateQuad)

Parameters


                                            quad

The value for the new object.

Return Value

A new value object that contains the coordinate quad information.

View Source on GitHub

-MGLCoordinateQuadValue
The Mapbox coordinate quad structure representation of the value.
Declaration
Objective-C

- (MGLCoordinateQuad)MGLCoordinateQuadValue;
Swift

func mglCoordinateQuadValue() -> MGLCoordinateQuad
View Source on GitHub

Working with Offline Map Values

+valueWithMGLOfflinePackProgress:

Creates a new value object containing the given MGLOfflinePackProgress structure.

Declaration

Objective-C

+ (nonnull NSValue *)valueWithMGLOfflinePackProgress:
              (MGLOfflinePackProgress)progress;

Swift

/*not inherited*/ init(mglOfflinePackProgress progress: MGLOfflinePackProgress)

Parameters


                                            progress

The value for the new object.

Return Value

A new value object that contains the offline pack progress information.

View Source on GitHub

MGLOfflinePackProgressValue

The MGLOfflinePackProgress structure representation of the value.

Declaration

Objective-C

@property (readonly) MGLOfflinePackProgress MGLOfflinePackProgressValue;

Swift

var mglOfflinePackProgressValue: MGLOfflinePackProgress { get }

View Source on GitHub

Working with Transition Values

+valueWithMGLTransition:

Creates a new value object containing the given MGLTransition structure.

Declaration

Objective-C

+ (nonnull NSValue *)valueWithMGLTransition:(MGLTransition)transition;

Swift

/*not inherited*/ init(mglTransition transition: MGLTransition)

Parameters


                                            transition

The value for the new object.

Return Value

A new value object that contains the transition information.

View Source on GitHub

MGLTransitionValue
The MGLTransition structure representation of the value.
Declaration
Objective-C

@property (readonly) MGLTransition MGLTransitionValue;
Swift

var mglTransitionValue: MGLTransition { get }
View Source on GitHub

+valueWithMGLSphericalPosition:

Creates a new value object containing the given MGLSphericalPosition structure.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLSphericalPosition:
              (MGLSphericalPosition)lightPosition;

Swift

convenience init(mglSphericalPosition lightPosition: MGLSphericalPosition)

Parameters


                                            lightPosition

The value for the new object.

Return Value

A new value object that contains the light position information.

View Source on GitHub

MGLSphericalPositionValue

The MGLSphericalPosition structure representation of the value.

Declaration

Objective-C

@property (readonly) MGLSphericalPosition MGLSphericalPositionValue;

Swift

var mglSphericalPositionValue: MGLSphericalPosition { get }

View Source on GitHub

+valueWithMGLLightAnchor:

Creates a new value object containing the given MGLLightAnchor enum.

Declaration

Objective-C

+ (nonnull NSValue *)valueWithMGLLightAnchor:(MGLLightAnchor)lightAnchor;

Swift

/*not inherited*/ init(mglLightAnchor lightAnchor: MGLLightAnchor)

Parameters


                                            lightAnchor

The value for the new object.

Return Value

A new value object that contains the light anchor information.

View Source on GitHub

MGLLightAnchorValue
The MGLLightAnchor enum representation of the value.
Declaration
Objective-C

@property (readonly) MGLLightAnchor MGLLightAnchorValue;
Swift

var mglLightAnchorValue: MGLLightAnchor { get }
View Source on GitHub

NSValue(MGLCircleStyleLayerAdditions)

@interface NSValue (MGLCircleStyleLayerAdditions)

Methods for wrapping an enumeration value for a style layer attribute in an MGLCircleStyleLayer object and unwrapping its raw value.

Working with Circle Style Layer Attribute Values

+valueWithMGLCirclePitchAlignment:

Creates a new value object containing the given MGLCirclePitchAlignment enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLCirclePitchAlignment:
              (MGLCirclePitchAlignment)circlePitchAlignment;

Swift

convenience init(mglCirclePitchAlignment circlePitchAlignment: MGLCirclePitchAlignment)

Parameters


                                            circlePitchAlignment

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLCirclePitchAlignmentValue

The MGLCirclePitchAlignment enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLCirclePitchAlignment MGLCirclePitchAlignmentValue;

Swift

var mglCirclePitchAlignmentValue: MGLCirclePitchAlignment { get }

View Source on GitHub

+valueWithMGLCircleScaleAlignment:

Creates a new value object containing the given MGLCircleScaleAlignment enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLCircleScaleAlignment:
              (MGLCircleScaleAlignment)circleScaleAlignment;

Swift

convenience init(mglCircleScaleAlignment circleScaleAlignment: MGLCircleScaleAlignment)

Parameters


                                            circleScaleAlignment

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLCircleScaleAlignmentValue

The MGLCircleScaleAlignment enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLCircleScaleAlignment MGLCircleScaleAlignmentValue;

Swift

var mglCircleScaleAlignmentValue: MGLCircleScaleAlignment { get }

View Source on GitHub

+valueWithMGLCircleTranslationAnchor:

Creates a new value object containing the given MGLCircleTranslationAnchor enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLCircleTranslationAnchor:
              (MGLCircleTranslationAnchor)circleTranslationAnchor;

Swift

convenience init(mglCircleTranslationAnchor circleTranslationAnchor: MGLCircleTranslationAnchor)

Parameters


                                            circleTranslationAnchor

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLCircleTranslationAnchorValue

The MGLCircleTranslationAnchor enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLCircleTranslationAnchor MGLCircleTranslationAnchorValue;

Swift

var mglCircleTranslationAnchorValue: MGLCircleTranslationAnchor { get }

View Source on GitHub

NSValue(MGLFillExtrusionStyleLayerAdditions)

@interface NSValue (MGLFillExtrusionStyleLayerAdditions)

Methods for wrapping an enumeration value for a style layer attribute in an MGLFillExtrusionStyleLayer object and unwrapping its raw value.

Working with Fill extrusion Style Layer Attribute Values

+valueWithMGLFillExtrusionTranslationAnchor:

Creates a new value object containing the given MGLFillExtrusionTranslationAnchor enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLFillExtrusionTranslationAnchor:
              (MGLFillExtrusionTranslationAnchor)fillExtrusionTranslationAnchor;

Swift

convenience init(mglFillExtrusionTranslationAnchor fillExtrusionTranslationAnchor: MGLFillExtrusionTranslationAnchor)

Parameters


                                            fillExtrusionTranslationAnchor

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLFillExtrusionTranslationAnchorValue

The MGLFillExtrusionTranslationAnchor enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLFillExtrusionTranslationAnchor MGLFillExtrusionTranslationAnchorValue;

Swift

var mglFillExtrusionTranslationAnchorValue: MGLFillExtrusionTranslationAnchor { get }

View Source on GitHub

NSValue(MGLFillStyleLayerAdditions)

@interface NSValue (MGLFillStyleLayerAdditions)

Methods for wrapping an enumeration value for a style layer attribute in an MGLFillStyleLayer object and unwrapping its raw value.

Working with Fill Style Layer Attribute Values

+valueWithMGLFillTranslationAnchor:

Creates a new value object containing the given MGLFillTranslationAnchor enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLFillTranslationAnchor:
              (MGLFillTranslationAnchor)fillTranslationAnchor;

Swift

convenience init(mglFillTranslationAnchor fillTranslationAnchor: MGLFillTranslationAnchor)

Parameters


                                            fillTranslationAnchor

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLFillTranslationAnchorValue

The MGLFillTranslationAnchor enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLFillTranslationAnchor MGLFillTranslationAnchorValue;

Swift

var mglFillTranslationAnchorValue: MGLFillTranslationAnchor { get }

View Source on GitHub

NSValue(MGLHillshadeStyleLayerAdditions)

@interface NSValue (MGLHillshadeStyleLayerAdditions)

Methods for wrapping an enumeration value for a style layer attribute in an MGLHillshadeStyleLayer object and unwrapping its raw value.

Working with Hillshade Style Layer Attribute Values

+valueWithMGLHillshadeIlluminationAnchor:

Creates a new value object containing the given MGLHillshadeIlluminationAnchor enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLHillshadeIlluminationAnchor:
              (MGLHillshadeIlluminationAnchor)hillshadeIlluminationAnchor;

Swift

convenience init(mglHillshadeIlluminationAnchor hillshadeIlluminationAnchor: MGLHillshadeIlluminationAnchor)

Parameters


                                            hillshadeIlluminationAnchor

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLHillshadeIlluminationAnchorValue

The MGLHillshadeIlluminationAnchor enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLHillshadeIlluminationAnchor MGLHillshadeIlluminationAnchorValue;

Swift

var mglHillshadeIlluminationAnchorValue: MGLHillshadeIlluminationAnchor { get }

View Source on GitHub

NSValue(MGLLineStyleLayerAdditions)

@interface NSValue (MGLLineStyleLayerAdditions)

Methods for wrapping an enumeration value for a style layer attribute in an MGLLineStyleLayer object and unwrapping its raw value.

Working with Line Style Layer Attribute Values

+valueWithMGLLineCap:

Creates a new value object containing the given MGLLineCap enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLLineCap:(MGLLineCap)lineCap;

Swift

convenience init(mglLineCap lineCap: MGLLineCap)

Parameters


                                            lineCap

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLLineCapValue
The MGLLineCap enumeration representation of the value.
Declaration
Objective-C

@property (readonly) MGLLineCap MGLLineCapValue;
Swift

var mglLineCapValue: MGLLineCap { get }
View Source on GitHub

+valueWithMGLLineJoin:

Creates a new value object containing the given MGLLineJoin enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLLineJoin:(MGLLineJoin)lineJoin;

Swift

convenience init(mglLineJoin lineJoin: MGLLineJoin)

Parameters


                                            lineJoin

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLLineJoinValue
The MGLLineJoin enumeration representation of the value.
Declaration
Objective-C

@property (readonly) MGLLineJoin MGLLineJoinValue;
Swift

var mglLineJoinValue: MGLLineJoin { get }
View Source on GitHub

+valueWithMGLLineTranslationAnchor:

Creates a new value object containing the given MGLLineTranslationAnchor enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLLineTranslationAnchor:
              (MGLLineTranslationAnchor)lineTranslationAnchor;

Swift

convenience init(mglLineTranslationAnchor lineTranslationAnchor: MGLLineTranslationAnchor)

Parameters


                                            lineTranslationAnchor

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLLineTranslationAnchorValue

The MGLLineTranslationAnchor enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLLineTranslationAnchor MGLLineTranslationAnchorValue;

Swift

var mglLineTranslationAnchorValue: MGLLineTranslationAnchor { get }

View Source on GitHub

NSValue(MGLRasterStyleLayerAdditions)

@interface NSValue (MGLRasterStyleLayerAdditions)

Methods for wrapping an enumeration value for a style layer attribute in an MGLRasterStyleLayer object and unwrapping its raw value.

Working with Raster Style Layer Attribute Values

+valueWithMGLRasterResamplingMode:

Creates a new value object containing the given MGLRasterResamplingMode enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLRasterResamplingMode:
              (MGLRasterResamplingMode)rasterResamplingMode;

Swift

convenience init(mglRasterResamplingMode rasterResamplingMode: MGLRasterResamplingMode)

Parameters


                                            rasterResamplingMode

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLRasterResamplingModeValue

The MGLRasterResamplingMode enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLRasterResamplingMode MGLRasterResamplingModeValue;

Swift

var mglRasterResamplingModeValue: MGLRasterResamplingMode { get }

View Source on GitHub

NSValue(MGLSymbolStyleLayerAdditions)

@interface NSValue (MGLSymbolStyleLayerAdditions)

Methods for wrapping an enumeration value for a style layer attribute in an MGLSymbolStyleLayer object and unwrapping its raw value.

Working with Symbol Style Layer Attribute Values

+valueWithMGLIconAnchor:

Creates a new value object containing the given MGLIconAnchor enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLIconAnchor:(MGLIconAnchor)iconAnchor;

Swift

convenience init(mglIconAnchor iconAnchor: MGLIconAnchor)

Parameters


                                            iconAnchor

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLIconAnchorValue
The MGLIconAnchor enumeration representation of the value.
Declaration
Objective-C

@property (readonly) MGLIconAnchor MGLIconAnchorValue;
Swift

var mglIconAnchorValue: MGLIconAnchor { get }
View Source on GitHub

+valueWithMGLIconPitchAlignment:

Creates a new value object containing the given MGLIconPitchAlignment enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLIconPitchAlignment:
              (MGLIconPitchAlignment)iconPitchAlignment;

Swift

convenience init(mglIconPitchAlignment iconPitchAlignment: MGLIconPitchAlignment)

Parameters


                                            iconPitchAlignment

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLIconPitchAlignmentValue

The MGLIconPitchAlignment enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLIconPitchAlignment MGLIconPitchAlignmentValue;

Swift

var mglIconPitchAlignmentValue: MGLIconPitchAlignment { get }

View Source on GitHub

+valueWithMGLIconRotationAlignment:

Creates a new value object containing the given MGLIconRotationAlignment enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLIconRotationAlignment:
              (MGLIconRotationAlignment)iconRotationAlignment;

Swift

convenience init(mglIconRotationAlignment iconRotationAlignment: MGLIconRotationAlignment)

Parameters


                                            iconRotationAlignment

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLIconRotationAlignmentValue

The MGLIconRotationAlignment enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLIconRotationAlignment MGLIconRotationAlignmentValue;

Swift

var mglIconRotationAlignmentValue: MGLIconRotationAlignment { get }

View Source on GitHub

+valueWithMGLIconTextFit:

Creates a new value object containing the given MGLIconTextFit enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLIconTextFit:(MGLIconTextFit)iconTextFit;

Swift

convenience init(mglIconTextFit iconTextFit: MGLIconTextFit)

Parameters


                                            iconTextFit

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLIconTextFitValue
The MGLIconTextFit enumeration representation of the value.
Declaration
Objective-C

@property (readonly) MGLIconTextFit MGLIconTextFitValue;
Swift

var mglIconTextFitValue: MGLIconTextFit { get }
View Source on GitHub

+valueWithMGLSymbolPlacement:

Creates a new value object containing the given MGLSymbolPlacement enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLSymbolPlacement:
              (MGLSymbolPlacement)symbolPlacement;

Swift

convenience init(mglSymbolPlacement symbolPlacement: MGLSymbolPlacement)

Parameters


                                            symbolPlacement

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLSymbolPlacementValue
The MGLSymbolPlacement enumeration representation of the value.
Declaration
Objective-C

@property (readonly) MGLSymbolPlacement MGLSymbolPlacementValue;
Swift

var mglSymbolPlacementValue: MGLSymbolPlacement { get }
View Source on GitHub

+valueWithMGLSymbolZOrder:

Creates a new value object containing the given MGLSymbolZOrder enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLSymbolZOrder:(MGLSymbolZOrder)symbolZOrder;

Swift

convenience init(mglSymbolZOrder symbolZOrder: MGLSymbolZOrder)

Parameters


                                            symbolZOrder

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLSymbolZOrderValue
The MGLSymbolZOrder enumeration representation of the value.
Declaration
Objective-C

@property (readonly) MGLSymbolZOrder MGLSymbolZOrderValue;
Swift

var mglSymbolZOrderValue: MGLSymbolZOrder { get }
View Source on GitHub

+valueWithMGLTextAnchor:

Creates a new value object containing the given MGLTextAnchor enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLTextAnchor:(MGLTextAnchor)textAnchor;

Swift

convenience init(mglTextAnchor textAnchor: MGLTextAnchor)

Parameters


                                            textAnchor

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLTextAnchorValue
The MGLTextAnchor enumeration representation of the value.
Declaration
Objective-C

@property (readonly) MGLTextAnchor MGLTextAnchorValue;
Swift

var mglTextAnchorValue: MGLTextAnchor { get }
View Source on GitHub

+valueWithMGLTextJustification:

Creates a new value object containing the given MGLTextJustification enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLTextJustification:
              (MGLTextJustification)textJustification;

Swift

convenience init(mglTextJustification textJustification: MGLTextJustification)

Parameters


                                            textJustification

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLTextJustificationValue
The MGLTextJustification enumeration representation of the value.
Declaration
Objective-C

@property (readonly) MGLTextJustification MGLTextJustificationValue;
Swift

var mglTextJustificationValue: MGLTextJustification { get }
View Source on GitHub

+valueWithMGLTextPitchAlignment:

Creates a new value object containing the given MGLTextPitchAlignment enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLTextPitchAlignment:
              (MGLTextPitchAlignment)textPitchAlignment;

Swift

convenience init(mglTextPitchAlignment textPitchAlignment: MGLTextPitchAlignment)

Parameters


                                            textPitchAlignment

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLTextPitchAlignmentValue

The MGLTextPitchAlignment enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLTextPitchAlignment MGLTextPitchAlignmentValue;

Swift

var mglTextPitchAlignmentValue: MGLTextPitchAlignment { get }

View Source on GitHub

+valueWithMGLTextRotationAlignment:

Creates a new value object containing the given MGLTextRotationAlignment enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLTextRotationAlignment:
              (MGLTextRotationAlignment)textRotationAlignment;

Swift

convenience init(mglTextRotationAlignment textRotationAlignment: MGLTextRotationAlignment)

Parameters


                                            textRotationAlignment

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLTextRotationAlignmentValue

The MGLTextRotationAlignment enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLTextRotationAlignment MGLTextRotationAlignmentValue;

Swift

var mglTextRotationAlignmentValue: MGLTextRotationAlignment { get }

View Source on GitHub

+valueWithMGLTextTransform:

Creates a new value object containing the given MGLTextTransform enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLTextTransform:
              (MGLTextTransform)textTransform;

Swift

convenience init(mglTextTransform textTransform: MGLTextTransform)

Parameters


                                            textTransform

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLTextTransformValue
The MGLTextTransform enumeration representation of the value.
Declaration
Objective-C

@property (readonly) MGLTextTransform MGLTextTransformValue;
Swift

var mglTextTransformValue: MGLTextTransform { get }
View Source on GitHub

+valueWithMGLTextWritingMode:

Creates a new value object containing the given MGLTextWritingMode enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLTextWritingMode:
              (MGLTextWritingMode)textWritingModes;

Swift

convenience init(mglTextWritingMode textWritingModes: MGLTextWritingMode)

Parameters


                                            textWritingModes

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLTextWritingModeValue
The MGLTextWritingMode enumeration representation of the value.
Declaration
Objective-C

@property (readonly) MGLTextWritingMode MGLTextWritingModeValue;
Swift

var mglTextWritingModeValue: MGLTextWritingMode { get }
View Source on GitHub

+valueWithMGLIconTranslationAnchor:

Creates a new value object containing the given MGLIconTranslationAnchor enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLIconTranslationAnchor:
              (MGLIconTranslationAnchor)iconTranslationAnchor;

Swift

convenience init(mglIconTranslationAnchor iconTranslationAnchor: MGLIconTranslationAnchor)

Parameters


                                            iconTranslationAnchor

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLIconTranslationAnchorValue

The MGLIconTranslationAnchor enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLIconTranslationAnchor MGLIconTranslationAnchorValue;

Swift

var mglIconTranslationAnchorValue: MGLIconTranslationAnchor { get }

View Source on GitHub

+valueWithMGLTextTranslationAnchor:

Creates a new value object containing the given MGLTextTranslationAnchor enumeration.

Declaration

Objective-C

+ (nonnull instancetype)valueWithMGLTextTranslationAnchor:
              (MGLTextTranslationAnchor)textTranslationAnchor;

Swift

convenience init(mglTextTranslationAnchor textTranslationAnchor: MGLTextTranslationAnchor)

Parameters


                                            textTranslationAnchor

The value for the new object.

Return Value

A new value object that contains the enumeration value.

View Source on GitHub

MGLTextTranslationAnchorValue

The MGLTextTranslationAnchor enumeration representation of the value.

Declaration

Objective-C

@property (readonly) MGLTextTranslationAnchor MGLTextTranslationAnchorValue;

Swift

var mglTextTranslationAnchorValue: MGLTextTranslationAnchor { get }

View Source on GitHub

Other Categories

NSExpression(MGLAdditions)

Creating Variable Expressions

zoomLevelVariableExpression

Declaration

heatmapDensityVariableExpression

Declaration

lineProgressVariableExpression

Declaration

geometryTypeVariableExpression

Declaration

featureIdentifierVariableExpression

Declaration

featureAccumulatedVariableExpression

Declaration

featureAttributesVariableExpression

Declaration

Creating Conditional Expressions

+mgl_expressionForConditional:trueExpression:falseExpresssion:

Declaration

Parameters

Creating Ramp, Scale, and Curve Expressions

+mgl_expressionForSteppingExpression:fromExpression:stops:

Related examples

Declaration

Parameters

+mgl_expressionForInterpolatingExpression:withCurveType:parameters:stops:

Related examples

Declaration

Parameters

+mgl_expressionForMatchingExpression:inDictionary:defaultExpression:

Declaration

Parameters

+mgl_expressionForAttributedExpressions:

Declaration

Parameters

Concatenating String Expressions

-mgl_expressionByAppendingExpression:

Declaration

Parameters

Converting JSON Expressions

+expressionWithMGLJSONObject:

Declaration

Parameters

Return Value

mgl_jsonExpressionObject

Declaration

Localizing the Expression

-mgl_expressionLocalizedIntoLocale:

Declaration

Parameters

NSValue(MGLAdditions)

Working with Geographic Coordinate Values

+valueWithMGLCoordinate:

Declaration

Parameters

Return Value

MGLCoordinateValue

Declaration

+valueWithMGLMapPoint:

Declaration

Parameters

Return Value

MGLMapPointValue

Declaration

+valueWithMGLCoordinateSpan:

Declaration

Parameters

Return Value

MGLCoordinateSpanValue

Declaration

+valueWithMGLCoordinateBounds:

Declaration

Parameters

Return Value

MGLCoordinateBoundsValue

Declaration

+valueWithMGLCoordinateQuad:

Declaration

Parameters