ArcGIS Runtime SDK for iOS
100.15
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A symbol used to display a graphic or a feature.
A symbol defines display properties for features and graphics (collectively referred to as geoelements). A geoelement has a geometry (location and shape), and optional descriptive information. For features and graphics to appear on a map, they must be assigned a symbol.
ArcGIS Runtime uses two models for defining symbols in your map: simple and advanced (multilayer). In general, simple symbols are single-layer symbols that provide basic symbols, such as marker, line, fill, text, or picture. Advanced symbols are composed of one or several layers that can be defined individually and combined to create complex representations.
Both of these are more fully described as follows:
Simple symbology is the symbology of the web map. When authoring maps in ArcGIS Pro as web maps, your multilayer symbols will be 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. This allows 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.
If your app works primarily with web maps that you want to look the same throughout the platform, your app should use the simple symbols API. Otherwise, make sure your users understand that advanced symbols render slightly differently on clients that don't support advanced symbology.
If your maps are used only with ArcGIS Runtime and ArcGIS Pro, you can use advanced symbols exclusively. Advanced symbols are vectorized in ArcGIS Runtime clients, thereby scaling better on devices with high resolution screens.
You can set AGSLoadSettings::useAdvancedSymbology
to control whether the map uses advanced symbols (when available) or always renders with simple symbols.
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 | |
NSDictionary< NSString *, id > * | unknownJSON |
NSDictionary< NSString *, id > * | unsupportedJSON |
- (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.
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. |
- (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.
completion | block that is invoked when operation completes. |
- (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.
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. |
- (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 | |
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staticrequiredinherited |
Initializes and returns an object from its JSON representation.
JSONObject | NSDictionary or NSArray containing the JSON. |
error | encountered during the operation, if any. |
- (BOOL) isEqualToSymbol: | (AGSSymbol *) | other |
Compares this symbol to another for equality.
other | The other symbol to compare this one to. |
YES
if the two symbols are equal, otherwise NO
.
|
requiredinherited |
Returns JSON representation for this object.
error | encountered during the operation, if any. |
NSDictionary
or NSArray
containing the JSON. Reimplemented in AGSPortalItem.
|
readrequirednonatomiccopyinherited |
A dictionary of values that was in the source JSON but was unparsed by API.
NSDictionary
containing the unknown JSON.
|
readnonatomiccopyinherited |
A dictionary of values that are supported by the REST API, but not exposed through the SDK API.
NSDictionary
containing the unsupported JSON.