AGSMultilayerSymbol Class Reference

Description

A base class for multilayer symbols. Multilayer symbols are built from multiple layers of symbols, which combine to let you add complex symbols to maps and scenes.

Multilayer symbols can be returned from feature layers based on web maps, feature services (with Use Advanced Symbology set to true), or mobile map packages, and can also be created from JSON by calling fromJSON:error: (AGSJSONSerializable-p). The same multilayer symbols and the components used to build them are available in ArcGIS Runtime, allowing you to programmatically create and change them using the AGSMultilayerPointSymbol, AGSMultilayerPolylineSymbol, and AGSMultilayerPolygonSymbol subclasses. You can access the layers that comprise the symbol through AGSMultilayerSymbol::symbolLayers. You can modify symbol layer properties, such as the color of a multilayer symbol. Some subclasses also expose additional symbol properties.

The symbol layers that comprise the symbol can be of different types. For example, a polyline geometry may be drawn with an AGSMultilayerPolylineSymbol that has line (stroke) symbol layers that draw the line geometry, and also point (marker) symbol layers that are drawn at specified point locations relative to the line geometry. When you save an ArcGIS Pro map as a web map, any multilayer symbols in the map are converted to simple symbols. In general, point symbols are converted to picture marker symbols optimized for the web, and line and polygon symbols are simplified while representing the original symbol as closely as possible. If you're authoring a feature service from ArcGIS Pro or ArcGIS Desktop, however, both the original symbols and the simplified symbols are stored. The stored symbols allow clients that support advanced symbols to render the features as originally symbolized, while those that do not support advanced symbols (such as ArcGIS Online Map Viewer) can use the simple symbols for display. Having both sets of symbols allows you to retain the advanced symbology where available and still share the feature service as widely as possible. Symbols used by web scenes are also multilayer but use a different specification than the ArcGIS Pro and ArcGIS Runtime symbols. When you read symbols from a web scene in your ArcGIS Runtime app, you get an ArcGIS Runtime representation of the multilayer symbol. Symbol layers in an ArcGIS Runtime multilayer symbol are in reverse order of how they appear in the JSON representation from the server.

See also

AGSSymbol

Since

100.2

Inheritance diagram for AGSMultilayerSymbol:

Instance Methods
(id< AGSCancelable >)	- createSwatchWithBackgroundColor:screen:completion:
(id< AGSCancelable >)	- createSwatchWithCompletion:
(id< AGSCancelable >)	- createSwatchWithGeometry:width:height:screen:backgroundColor:completion:
(nullable id< AGSCancelable >)	- createSwatchWithWidth:height:screen:backgroundColor:completion:
(BOOL)	- isEqualToSymbol:
(nullable id)	- toJSON:

Class Methods
(nullable id< AGSJSONSerializable >)	+ fromJSON:error:

Properties
AGSColor *	color
AGSSymbolReferenceProperties *	referenceProperties
NSMutableArray< AGSSymbolLayer * > *	symbolLayers
NSDictionary< NSString *, id > *	unknownJSON
NSDictionary< NSString *, id > *	unsupportedJSON

Method Documentation

createSwatchWithBackgroundColor:screen:completion:

- (id<AGSCancelable>) createSwatchWithBackgroundColor:		(nullable AGSColor *)	backgroundColor
screen:		(nullable AGSScreen *)	screen
completion:		(void(^)(AGSImage *__nullable swatch, NSError *__nullable error))	completion

Creates swatch with provided background color.

Parameters

backgroundColor	Desired background color of the image.
screen	Screen that the swatch will be rendered for. If you specify nil then the main screen will be used.
completion	A block that is invoked when the operation completes.

Since

100

createSwatchWithCompletion:

- (id<AGSCancelable>) createSwatchWithCompletion:

(void(^)(AGSImage *__nullable swatch, NSError *__nullable error))

completion

Creates a swatch with a clear background color. This method uses main screen's scale to determine the size of the image.

Parameters

completion

block that is invoked when operation completes.

Since

100

createSwatchWithGeometry:width:height:screen:backgroundColor:completion:

- (id<AGSCancelable>) createSwatchWithGeometry:		(AGSGeometry *)	geometry
width:		(NSInteger)	width
height:		(NSInteger)	height
screen:		(nullable AGSScreen *)	screen
backgroundColor:		(nullable AGSColor *)	backgroundColor
completion:		(void(^)(AGSImage *__nullable swatch, NSError *__nullable error))	completion

Creates a swatch using the provided geometry and other parameters. This is the most configurable of the methods to create swatches. You can pass the pixels per inch that you would like the image to be rendered at. This will determine how many pixels are used to render symbols of sizes that are specified in points.

Parameters

geometry	The geometry of the symbol to be drawn in the swatch image. The specified geometry is in DIPs, with the point {0,0} located at the center of the swatch image. The X-axis increases towards the right side of the swatch image. The Y-axis increases towards the top of the swatch image. For example: when creating a swatch for an AGSMarkerSymbol, specifying a geometry of {10,10} will draw the marker 10 DIPs up and to the right of the center of the swatch. The geometry type (AGSPoint, AGSPolyline, AGSPolygon) should correspond to the symbol type (AGSMarkerSymbol, AGSLineSymbol, AGSFillSymbol). The geometry's spatial reference is ignored.
width	Desired width of the image in pixels.
height	Desired height of the image in pixels.
screen	The screen that the swatch will be rendered for. If you specify nil then the main screen will be used.
backgroundColor	The desired background color of the image.
completion	A block that is invoked when operation completes.

Since

100

createSwatchWithWidth:height:screen:backgroundColor:completion:

- (nullable id<AGSCancelable>) createSwatchWithWidth:		(NSInteger)	width
height:		(NSInteger)	height
screen:		(nullable AGSScreen *)	screen
backgroundColor:		(nullable AGSColor *)	backgroundColor
completion:		(void(^)(AGSImage *__nullable swatch, NSError *__nullable error))	completion

fromJSON:error:

+ (nullable id<AGSJSONSerializable>) fromJSON: (id)  JSONObject error: (NSError **)  error

staticrequiredinherited

Initializes and returns an object from its JSON representation.

Parameters

JSONObject	NSDictionary or NSArray containing the JSON.
error	encountered during the operation, if any.

Since

100

isEqualToSymbol:

- (BOOL) isEqualToSymbol:

(AGSSymbol *)

other

Compares this symbol to another for equality.

Parameters

other

The other symbol to compare this one to.

Returns

YES if the two symbols are equal, otherwise NO.

Since

100

toJSON:

- (nullable id) toJSON: (NSError **)  error

requiredinherited

Returns JSON representation for this object.

Parameters

error

encountered during the operation, if any.

Returns

NSDictionary or NSArray containing the JSON.

Since

100

Reimplemented in AGSPortalItem.

Property Documentation

color

- (AGSColor*) color

readwritenonatomicstrong

The consensus color of all layers in the symbol (excluding those that are color-locked).

Because AGSMultilayerSymbol may have multiple symbol layers, this property represents the value of all color and tint color properties of constituent symbol layers, excluding any AGSStrokeSymbolLayer in an AGSMultilayerPolygonSymbol, as those symbol layers are outlines. The property defines the color and tint color of symbols contained in AGSVectorMarkerSymbolElement. Constituent symbol layers whose isColorLocked property is YES do not change color as a result of this function. To change outline colors, modify the outline symbol layer colors individually.

Since

100.2

referenceProperties

- (AGSSymbolReferenceProperties*) referenceProperties

readwritenonatomicstrong

The reference properties for this symbol.

Since

100.13

symbolLayers

- (NSMutableArray<AGSSymbolLayer*>*) symbolLayers

readnonatomicstrong

The symbol layers of the multilayer symbol.

Note

Symbol layers in a multilayer symbol are in reverse order of how they appear in the JSON representation from the server.

Since

100.5

unknownJSON

- (NSDictionary<NSString*,id>*) unknownJSON

readrequirednonatomiccopyinherited

A dictionary of values that was in the source JSON but was unparsed by API.

Returns

NSDictionary containing the unknown JSON.

Since

100

unsupportedJSON

- (NSDictionary<NSString*,id>*) unsupportedJSON

readnonatomiccopyinherited

A dictionary of values that are supported by the REST API, but not exposed through the SDK API.

Returns

NSDictionary containing the unsupported JSON.

Since

100