MGLVectorStyleLayer
@interface MGLVectorStyleLayer : MGLForegroundStyleLayer
MGLVectorStyleLayer
is an abstract superclass for style layers whose content is defined by an MGLShapeSource
or MGLVectorTileSource
object.
Create instances of MGLCircleStyleLayer
, MGLFillStyleLayer
, MGLFillExtrusionStyleLayer
, MGLHeatmapStyleLayer
, MGLLineStyleLayer
, and MGLSymbolStyleLayer
in order to use MGLVectorStyleLayer
‘s properties and methods. Do not create instances of MGLVectorStyleLayer
directly, and do not create your own subclasses of this class.
Refining a Style Layer’s Content
sourceLayerIdentifier
Identifier of the layer within the source identified by the sourceIdentifier
property from which the receiver obtains the data to style.
Declaration
Objective-C
@property (nonatomic, assign, unsafe_unretained, readwrite, nullable)
NSString *sourceLayerIdentifier;
Swift
var sourceLayerIdentifier: String? { get set }
predicate
The style layer’s predicate.
Use the style layer’s predicate to include only the features in the source layer that satisfy a condition that you define. If the style layer initially comes from the style, its predicate corresponds to the filter
property in the style JSON.
See the “Predicates and Expressions” guide for details about the predicate syntax supported by this class.
Example
To filter the layer to include only the features whose index
attribute is 5 or 10 and whose ele
attribute is at least 1,500, you could create an NSCompoundPredicate
along these lines:
let layer = MGLLineStyleLayer(identifier: "contour", source: terrain)
layer.sourceLayerIdentifier = "contours"
layer.predicate = NSPredicate(format: "(index == 5 || index == 10) && CAST(ele, 'NSNumber') >= 1500.0")
mapView.style?.addLayer(layer)
Declaration
Objective-C
@property (nonatomic, assign, unsafe_unretained, readwrite, nullable)
NSPredicate *predicate;
Swift
var predicate: NSPredicate? { get set }
iOS SDK
Tutorials
API Reference
- MGLUserLocationAnnotationViewStyle
- MGLAccountManager
- MGLAnnotationImage
- MGLCircleStyleLayer
- MGLMapSnapshot
- NSValue(MGLHillshadeStyleLayerAdditions)
- MGLLight
- MGLCoordinateSpan
- MGLOfflinePack
- MGLAnnotationVerticalAlignment
- MGLSource
- MGLDEMEncoding
- MGLCoordinateSpan
- MGLMapCamera
- MGLTextWritingMode
- MGLIconTranslationAnchor
- NSValue(MGLSymbolStyleLayerAdditions)
- MGLOfflinePackProgress
- MGLMapSnapshotOptions
- Primitive Shapes
- NSValue(MGLAdditions)
- MGLTextPitchAlignment
- MGLSphericalPosition
- MGLCompassDirectionFormatter
- MGLVectorTileSource
- MGLMapViewDelegate
- MGLHillshadeIlluminationAnchor
- MGLIconTextFit
- MGLLocationManagerDelegate
- MGLShape
- Formatters
- MGLCoordinateBounds
- MGLCoordinateQuad
- MGLMapSnapshotterDelegate
- MGLAnnotationViewDragState
- MGLComputedShapeSource
- NSValue(MGLCircleStyleLayerAdditions)
- MGLHillshadeStyleLayer
- MGLOverlay
- MGLPolygon
- MGLStyleLayer
- MGLTilePyramidOfflineRegion
- MGLMapView
- MGLTransition
- MGLOfflineStorage
- MGLComputedShapeSourceDataSource
- MGLMapDebugMaskOptions
- MGLClockDirectionFormatter
- MGLTextRotationAlignment
- MGLUserTrackingMode
- NSValue(MGLRasterStyleLayerAdditions)
- MGLAttributionInfo
- MGLRasterStyleLayer
- Style Content
- MGLUserLocation
- MGLRasterTileSource
- MGLFillTranslationAnchor
- Other Protocols
- MGLSphericalPosition
- MGLMapSnapshotter
- MGLRasterResamplingMode
- MGLAnnotationView
- MGLResourceKind
- MGLShapeCollection
- Other Enumerations
- NSExpression(MGLAdditions)
- MGLCirclePitchAlignment
- MGLFillExtrusionTranslationAnchor
- Style Layers
- Other Constants
- MGLCoordinateBounds
- Appendices
- MGLLoggingConfiguration
- Other Structures
- MGLMapSnapshotOverlay
- MGLCircleTranslationAnchor
- User Interaction
- NSValue(MGLLineStyleLayerAdditions)
- MGLErrorCode
- MGLAttributedExpression
- MGLSymbolStyleLayer
- MGLCircleScaleAlignment
- MGLTextTransform
- MGLOrnamentVisibility
- MGLMultiPoint
- MGLShapeSource
- MGLLightAnchor
- MGLCalloutViewDelegate
- MGLCluster
- MGLOfflinePackProgress
- MGLPolyline
- MGLFeature
- MGLAnnotation
- MGLFillStyleLayer
- MGLIconRotationAlignment
- NSValue(MGLFillStyleLayerAdditions)
- Other Classes
- MGLLineTranslationAnchor
- MGLTextAnchor
- Offline Maps
- MGLLocationManager
- MGLStyle
- Other Type Definitions
- NSValue(MGLFillExtrusionStyleLayerAdditions)
- Style Primitives
- MGLTileSource
- MGLTransition
- MGLForegroundStyleLayer
- MGLStylable
- MGLIconPitchAlignment
- MGLOfflineRegion
- MGLHeatmapStyleLayer
- MGLCompassButton
- MGLFillExtrusionStyleLayer
- MGLSymbolPlacement
- MGLMultiPolyline
- MGLOfflinePackState
- MGLImageSource
- MGLCoordinateFormatter
- MGLDistanceFormatter
- MGLCoordinateQuad
- MGLPointCollection
- MGLPointAnnotation
- MGLTextJustification
- MGLOfflineStorageDelegate
- MGLCalloutView
- MGLOrnamentPosition
- MGLUserLocationAnnotationView
- MGLTileCoordinateSystem
- MGLSymbolZOrder
- MGLLineCap
- Other Functions
- MGLNetworkConfiguration
- MGLShapeOfflineRegion
- Styling the Map
- MGLLineJoin
- Maps
- MGLAttributionInfoStyle
- MGLIconAnchor
- MGLBackgroundStyleLayer
- MGLMultiPolygon
- Annotations
- MGLVectorStyleLayer
- Location Updates
- MGLTextTranslationAnchor
- MGLLineStyleLayer
- Other Categories
- Geometry
- MGLLoggingLevel