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</li>
<li class="nav-group-task" data-name="MGLTileSourceOptionTileSize" data-url="Other Constants.html#/c:@MGLTileSourceOptionTileSize">
<a title="MGLTileSourceOptionTileSize" class="nav-group-task-link" href="Other Constants.html#/c:@MGLTileSourceOptionTileSize">MGLTileSourceOptionTileSize</a>
</li>
<li class="nav-group-task" data-name="MapboxVersionNumber" data-url="Other Constants.html#/c:@MapboxVersionNumber">
<a title="MapboxVersionNumber" class="nav-group-task-link" href="Other Constants.html#/c:@MapboxVersionNumber">MapboxVersionNumber</a>
</li>
<li class="nav-group-task" data-name="MapboxVersionString" data-url="Other Constants.html#/c:@MapboxVersionString">
<a title="MapboxVersionString" class="nav-group-task-link" href="Other Constants.html#/c:@MapboxVersionString">MapboxVersionString</a>
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<a title="MGLCircleScaleAlignment" class="nav-group-task-link" href="Enums/MGLCircleScaleAlignment.html">MGLCircleScaleAlignment</a>
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<a title="MGLDEMEncoding" class="nav-group-task-link" href="Enums/MGLDEMEncoding.html">MGLDEMEncoding</a>
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<a title="MGLErrorCode" class="nav-group-task-link" href="Enums/MGLErrorCode.html">MGLErrorCode</a>
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</li>
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<a title="MGLHillshadeIlluminationAnchor" class="nav-group-task-link" href="Enums/MGLHillshadeIlluminationAnchor.html">MGLHillshadeIlluminationAnchor</a>
</li>
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<a title="MGLIconAnchor" class="nav-group-task-link" href="Enums/MGLIconAnchor.html">MGLIconAnchor</a>
</li>
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<a title="MGLIconPitchAlignment" class="nav-group-task-link" href="Enums/MGLIconPitchAlignment.html">MGLIconPitchAlignment</a>
</li>
<li class="nav-group-task" data-name="MGLIconRotationAlignment" data-url="Enums/MGLIconRotationAlignment.html">
<a title="MGLIconRotationAlignment" class="nav-group-task-link" href="Enums/MGLIconRotationAlignment.html">MGLIconRotationAlignment</a>
</li>
<li class="nav-group-task" data-name="MGLIconTextFit" data-url="Enums/MGLIconTextFit.html">
<a title="MGLIconTextFit" class="nav-group-task-link" href="Enums/MGLIconTextFit.html">MGLIconTextFit</a>
</li>
<li class="nav-group-task" data-name="MGLIconTranslationAnchor" data-url="Enums/MGLIconTranslationAnchor.html">
<a title="MGLIconTranslationAnchor" class="nav-group-task-link" href="Enums/MGLIconTranslationAnchor.html">MGLIconTranslationAnchor</a>
</li>
<li class="nav-group-task" data-name="MGLLightAnchor" data-url="Enums/MGLLightAnchor.html">
<a title="MGLLightAnchor" class="nav-group-task-link" href="Enums/MGLLightAnchor.html">MGLLightAnchor</a>
</li>
<li class="nav-group-task" data-name="MGLLineCap" data-url="Enums/MGLLineCap.html">
<a title="MGLLineCap" class="nav-group-task-link" href="Enums/MGLLineCap.html">MGLLineCap</a>
</li>
<li class="nav-group-task" data-name="MGLLineJoin" data-url="Enums/MGLLineJoin.html">
<a title="MGLLineJoin" class="nav-group-task-link" href="Enums/MGLLineJoin.html">MGLLineJoin</a>
</li>
<li class="nav-group-task" data-name="MGLLineTranslationAnchor" data-url="Enums/MGLLineTranslationAnchor.html">
<a title="MGLLineTranslationAnchor" class="nav-group-task-link" href="Enums/MGLLineTranslationAnchor.html">MGLLineTranslationAnchor</a>
</li>
<li class="nav-group-task" data-name="MGLMapDebugMaskOptions" data-url="Enums/MGLMapDebugMaskOptions.html">
<a title="MGLMapDebugMaskOptions" class="nav-group-task-link" href="Enums/MGLMapDebugMaskOptions.html">MGLMapDebugMaskOptions</a>
</li>
<li class="nav-group-task" data-name="MGLRasterResamplingMode" data-url="Enums/MGLRasterResamplingMode.html">
<a title="MGLRasterResamplingMode" class="nav-group-task-link" href="Enums/MGLRasterResamplingMode.html">MGLRasterResamplingMode</a>
</li>
<li class="nav-group-task" data-name="MGLResourceKind" data-url="Enums/MGLResourceKind.html">
<a title="MGLResourceKind" class="nav-group-task-link" href="Enums/MGLResourceKind.html">MGLResourceKind</a>
</li>
<li class="nav-group-task" data-name="MGLSymbolPlacement" data-url="Enums/MGLSymbolPlacement.html">
<a title="MGLSymbolPlacement" class="nav-group-task-link" href="Enums/MGLSymbolPlacement.html">MGLSymbolPlacement</a>
</li>
<li class="nav-group-task" data-name="MGLTextAnchor" data-url="Enums/MGLTextAnchor.html">
<a title="MGLTextAnchor" class="nav-group-task-link" href="Enums/MGLTextAnchor.html">MGLTextAnchor</a>
</li>
<li class="nav-group-task" data-name="MGLTextJustification" data-url="Enums/MGLTextJustification.html">
<a title="MGLTextJustification" class="nav-group-task-link" href="Enums/MGLTextJustification.html">MGLTextJustification</a>
</li>
<li class="nav-group-task" data-name="MGLTextPitchAlignment" data-url="Enums/MGLTextPitchAlignment.html">
<a title="MGLTextPitchAlignment" class="nav-group-task-link" href="Enums/MGLTextPitchAlignment.html">MGLTextPitchAlignment</a>
</li>
<li class="nav-group-task" data-name="MGLTextRotationAlignment" data-url="Enums/MGLTextRotationAlignment.html">
<a title="MGLTextRotationAlignment" class="nav-group-task-link" href="Enums/MGLTextRotationAlignment.html">MGLTextRotationAlignment</a>
</li>
<li class="nav-group-task" data-name="MGLTextTransform" data-url="Enums/MGLTextTransform.html">
<a title="MGLTextTransform" class="nav-group-task-link" href="Enums/MGLTextTransform.html">MGLTextTransform</a>
</li>
<li class="nav-group-task" data-name="MGLTextTranslationAnchor" data-url="Enums/MGLTextTranslationAnchor.html">
<a title="MGLTextTranslationAnchor" class="nav-group-task-link" href="Enums/MGLTextTranslationAnchor.html">MGLTextTranslationAnchor</a>
</li>
<li class="nav-group-task" data-name="MGLTileCoordinateSystem" data-url="Enums/MGLTileCoordinateSystem.html">
<a title="MGLTileCoordinateSystem" class="nav-group-task-link" href="Enums/MGLTileCoordinateSystem.html">MGLTileCoordinateSystem</a>
</li>
</ul>
</li>
<li class="nav-group-name" data-name="Other Protocols">
<a class="small-heading" href="Other Protocols.html">Other Protocols<span class="anchor-icon" /></a>
<ul class="nav-group-tasks">
<li class="nav-group-task" data-name="MGLComputedShapeSourceDataSource" data-url="Protocols/MGLComputedShapeSourceDataSource.html">
<a title="MGLComputedShapeSourceDataSource" class="nav-group-task-link" href="Protocols/MGLComputedShapeSourceDataSource.html">MGLComputedShapeSourceDataSource</a>
</li>
<li class="nav-group-task" data-name="MGLOfflineStorageDelegate" data-url="Protocols/MGLOfflineStorageDelegate.html">
<a title="MGLOfflineStorageDelegate" class="nav-group-task-link" href="Protocols/MGLOfflineStorageDelegate.html">MGLOfflineStorageDelegate</a>
</li>
</ul>
</li>
<li class="nav-group-name" data-name="Other Type Definitions">
<a class="small-heading" href="Other Type Definitions.html">Other Type Definitions<span class="anchor-icon" /></a>
<ul class="nav-group-tasks">
<li class="nav-group-task" data-name="MGLMapSnapshotCompletionHandler" data-url="Other Type Definitions.html#/c:MGLMapSnapshotter.h@T@MGLMapSnapshotCompletionHandler">
<a title="MGLMapSnapshotCompletionHandler" class="nav-group-task-link" href="Other Type Definitions.html#/c:MGLMapSnapshotter.h@T@MGLMapSnapshotCompletionHandler">MGLMapSnapshotCompletionHandler</a>
</li>
<li class="nav-group-task" data-name="MGLOfflinePackAdditionCompletionHandler" data-url="Other Type Definitions.html#/c:MGLOfflineStorage.h@T@MGLOfflinePackAdditionCompletionHandler">
<a title="MGLOfflinePackAdditionCompletionHandler" class="nav-group-task-link" href="Other Type Definitions.html#/c:MGLOfflineStorage.h@T@MGLOfflinePackAdditionCompletionHandler">MGLOfflinePackAdditionCompletionHandler</a>
</li>
<li class="nav-group-task" data-name="MGLOfflinePackRemovalCompletionHandler" data-url="Other Type Definitions.html#/c:MGLOfflineStorage.h@T@MGLOfflinePackRemovalCompletionHandler">
<a title="MGLOfflinePackRemovalCompletionHandler" class="nav-group-task-link" href="Other Type Definitions.html#/c:MGLOfflineStorage.h@T@MGLOfflinePackRemovalCompletionHandler">MGLOfflinePackRemovalCompletionHandler</a>
</li>
<li class="nav-group-task" data-name="MGLOfflinePackUserInfoKey" data-url="Other Type Definitions.html#/c:MGLOfflineStorage.h@T@MGLOfflinePackUserInfoKey">
<a title="MGLOfflinePackUserInfoKey" class="nav-group-task-link" href="Other Type Definitions.html#/c:MGLOfflineStorage.h@T@MGLOfflinePackUserInfoKey">MGLOfflinePackUserInfoKey</a>
</li>
<li class="nav-group-task" data-name="MGLShapeSourceOption" data-url="Other Type Definitions.html#/c:MGLShapeSource.h@T@MGLShapeSourceOption">
<a title="MGLShapeSourceOption" class="nav-group-task-link" href="Other Type Definitions.html#/c:MGLShapeSource.h@T@MGLShapeSourceOption">MGLShapeSourceOption</a>
</li>
<li class="nav-group-task" data-name="MGLTileSourceOption" data-url="Other Type Definitions.html#/c:MGLTileSource.h@T@MGLTileSourceOption">
<a title="MGLTileSourceOption" class="nav-group-task-link" href="Other Type Definitions.html#/c:MGLTileSource.h@T@MGLTileSourceOption">MGLTileSourceOption</a>
</li>
</ul>
</li>
<li class="nav-group-name" data-name="Other Functions">
<a class="small-heading" href="Other Functions.html">Other Functions<span class="anchor-icon" /></a>
<ul class="nav-group-tasks">
<li class="nav-group-task" data-name="MGLCoordinateQuadFromCoordinateBounds" data-url="Other Functions.html#/c:MGLGeometry.h@F@MGLCoordinateQuadFromCoordinateBounds">
<a title="MGLCoordinateQuadFromCoordinateBounds" class="nav-group-task-link" href="Other Functions.html#/c:MGLGeometry.h@F@MGLCoordinateQuadFromCoordinateBounds">MGLCoordinateQuadFromCoordinateBounds</a>
</li>
<li class="nav-group-task" data-name="MGLCoordinateQuadMake" data-url="Other Functions.html#/c:MGLGeometry.h@F@MGLCoordinateQuadMake">
<a title="MGLCoordinateQuadMake" class="nav-group-task-link" href="Other Functions.html#/c:MGLGeometry.h@F@MGLCoordinateQuadMake">MGLCoordinateQuadMake</a>
</li>
<li class="nav-group-task" data-name="MGLMapPointForCoordinate" data-url="Other Functions.html#/c:@F@MGLMapPointForCoordinate">
<a title="MGLMapPointForCoordinate" class="nav-group-task-link" href="Other Functions.html#/c:@F@MGLMapPointForCoordinate">MGLMapPointForCoordinate</a>
</li>
<li class="nav-group-task" data-name="MGLMapPointMake" data-url="Other Functions.html#/c:MGLGeometry.h@F@MGLMapPointMake">
<a title="MGLMapPointMake" class="nav-group-task-link" href="Other Functions.html#/c:MGLGeometry.h@F@MGLMapPointMake">MGLMapPointMake</a>
</li>
<li class="nav-group-task" data-name="MGLSphericalPositionMake" data-url="Other Functions.html#/c:MGLLight.h@F@MGLSphericalPositionMake">
<a title="MGLSphericalPositionMake" class="nav-group-task-link" href="Other Functions.html#/c:MGLLight.h@F@MGLSphericalPositionMake">MGLSphericalPositionMake</a>
</li>
<li class="nav-group-task" data-name="MGLStringFromCoordinateQuad" data-url="Other Functions.html#/c:MGLGeometry.h@F@MGLStringFromCoordinateQuad">
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<a title="MGLTransitionMake" class="nav-group-task-link" href="Other Functions.html#/c:MGLTypes.h@F@MGLTransitionMake">MGLTransitionMake</a>
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<li class="nav-group-name" data-name="Other Structures">
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<li class="nav-group-task" data-name="MGLCoordinateQuad" data-url="Structs/MGLCoordinateQuad.html">
<a title="MGLCoordinateQuad" class="nav-group-task-link" href="Structs/MGLCoordinateQuad.html">MGLCoordinateQuad</a>
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<a title="MGLSphericalPosition" class="nav-group-task-link" href="Structs/MGLSphericalPosition.html">MGLSphericalPosition</a>
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<a title="MGLTransition" class="nav-group-task-link" href="Structs/MGLTransition.html">MGLTransition</a>
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<article class="main-content">
<section class="section">
<div class="section-content">
<h1 id='working-with-geojson-data' class='heading'>Working with GeoJSON Data</h1>
<p>This SDK offers several ways to work with <a href="http://geojson.org/">GeoJSON</a> files.
GeoJSON is a standard file format for representing geographic data.</p>
<h2 id='adding-a-geojson-file-to-the-map' class='heading'>Adding a GeoJSON file to the map</h2>
<p>You can use
<a href="https://www.mapbox.com/studio/datasets/">Mapbox Studio’s Datasets editor</a> to
upload a GeoJSON file and include it in your custom map style. The GeoJSON data
will be hosted on Mapbox servers. When a user loads your style, the SDK
automatically loads the GeoJSON data for display.</p>
<p>Alternatively, if you need to host the GeoJSON file elsewhere or bundle it with
your application, you can use a GeoJSON file as the basis of an <code><a href="Classes/MGLShapeSource.html">MGLShapeSource</a></code>
object. Pass the file’s URL into the
<code><a href="Classes/MGLShapeSource.html#/c:objc(cs)MGLShapeSource(im)initWithIdentifier:URL:options:">-[MGLShapeSource initWithIdentifier:URL:options:]</a></code> initializer and add the
shape source to the map using the <code><a href="Classes/MGLStyle.html#/c:objc(cs)MGLStyle(im)addSource:">-[MGLStyle addSource:]</a></code> method. The URL may
be a local file URL, an HTTP URL, or an HTTPS URL.</p>
<p>Once you’ve added the GeoJSON file to the map via an <code><a href="Classes/MGLShapeSource.html">MGLShapeSource</a></code> object,
you can configure the appearance of its data and control what data is visible
using <code><a href="Classes/MGLStyleLayer.html">MGLStyleLayer</a></code> objects, you can
<a href="#extracting-geojson-data-from-the-map">access the data programmatically</a>.</p>
<h2 id='converting-geojson-data-into-shape-objects' class='heading'>Converting GeoJSON data into shape objects</h2>
<p>If you have GeoJSON data in the form of source code (also known as “GeoJSON
text”), you can convert it into an <code><a href="Classes/MGLShape.html">MGLShape</a></code>, <code><a href="Protocols/MGLFeature.html">MGLFeature</a></code>, or
<code><a href="Content Primitives.html#/c:objc(cs)MGLShapeCollectionFeature">MGLShapeCollectionFeature</a></code> object that the <code><a href="Classes/MGLShapeSource.html">MGLShapeSource</a></code> class understands
natively. First, create an <code>NSData</code> object out of the source code string or file
contents, then pass that data object into the
<code><a href="Classes/MGLShape.html#/c:objc(cs)MGLShape(cm)shapeWithData:encoding:error:">+[MGLShape shapeWithData:encoding:error:]</a></code> method. Finally, you can pass the
resulting shape or feature object into the
<code><a href="Classes/MGLShapeSource.html#/c:objc(cs)MGLShapeSource(im)initWithIdentifier:shape:options:">-[MGLShapeSource initWithIdentifier:shape:options:]</a></code> initializer and add it to
the map, or you can use the object and its properties to power non-map-related
functionality in your application.</p>
<p>To include multiple shapes in the source, create and pass an <code><a href="Classes/MGLShapeCollection.html">MGLShapeCollection</a></code> or
<code><a href="Content Primitives.html#/c:objc(cs)MGLShapeCollectionFeature">MGLShapeCollectionFeature</a></code> object to
<code><a href="Classes/MGLShapeSource.html#/c:objc(cs)MGLShapeSource(im)initWithIdentifier:shape:options:">-[MGLShapeSource initWithIdentifier:shape:options:]</a></code>. Alternatively, use the
<code><a href="Classes/MGLShapeSource.html#/c:objc(cs)MGLShapeSource(im)initWithIdentifier:features:options:">-[MGLShapeSource initWithIdentifier:features:options:]</a></code> or
<code><a href="Classes/MGLShapeSource.html#/c:objc(cs)MGLShapeSource(im)initWithIdentifier:shapes:options:">-[MGLShapeSource initWithIdentifier:shapes:options:]</a></code> method to create a shape source
with an array. <code><a href="Classes/MGLShapeSource.html#/c:objc(cs)MGLShapeSource(im)initWithIdentifier:features:options:">-[MGLShapeSource initWithIdentifier:features:options:]</a></code> accepts only <code><a href="Protocols/MGLFeature.html">MGLFeature</a></code>
instances, such as <code><a href="Content Primitives.html#/c:objc(cs)MGLPointFeature">MGLPointFeature</a></code> objects, whose attributes you can use when
applying a predicate to <code><a href="Classes/MGLVectorStyleLayer.html">MGLVectorStyleLayer</a></code> or configuring a style layer’s
appearance.</p>
<h2 id='extracting-geojson-data-from-the-map' class='heading'>Extracting GeoJSON data from the map</h2>
<p>Any <code><a href="Classes/MGLShape.html">MGLShape</a></code>, <code><a href="Protocols/MGLFeature.html">MGLFeature</a></code>, or <code><a href="Content Primitives.html#/c:objc(cs)MGLShapeCollectionFeature">MGLShapeCollectionFeature</a></code> object has an
<code><a href="Classes/MGLShape.html#/c:objc(cs)MGLShape(im)geoJSONDataUsingEncoding:">-[MGLShape geoJSONDataUsingEncoding:]</a></code> method that you can use to create a
GeoJSON source code representation of the object. You can extract a feature
object from the map using a method such as
<code><a href="Classes/MGLMapView.html#/c:objc(cs)MGLMapView(im)visibleFeaturesAtPoint:">-[MGLMapView visibleFeaturesAtPoint:]</a></code>.</p>
<h2 id='about-geojson-deserialization' class='heading'>About GeoJSON deserialization</h2>
<p>The process of converting GeoJSON text into <code><a href="Classes/MGLShape.html">MGLShape</a></code>, <code><a href="Protocols/MGLFeature.html">MGLFeature</a></code>, or
<code><a href="Content Primitives.html#/c:objc(cs)MGLShapeCollectionFeature">MGLShapeCollectionFeature</a></code> objects is known as “GeoJSON deserialization”.
GeoJSON geometries, features, and feature collections are known in this SDK as
shapes, features, and shape collection features, respectively.</p>
<p>Each GeoJSON object type corresponds to a type provided by either this SDK or
the Core Location framework:</p>
<table><thead>
<tr>
<th>GeoJSON object type</th>
<th>SDK type</th>
</tr>
</thead><tbody>
<tr>
<td><code>Position</code> (longitude, latitude)</td>
<td><code>CLLocationCoordinate2D</code> (latitude, longitude)</td>
</tr>
<tr>
<td><code>Point</code></td>
<td><code><a href="Classes/MGLPointAnnotation.html">MGLPointAnnotation</a></code></td>
</tr>
<tr>
<td><code>MultiPoint</code></td>
<td><code><a href="Classes/MGLPointCollection.html">MGLPointCollection</a></code></td>
</tr>
<tr>
<td><code>LineString</code></td>
<td><code><a href="Classes/MGLPolyline.html">MGLPolyline</a></code></td>
</tr>
<tr>
<td><code>MultiLineString</code></td>
<td><code><a href="Classes/MGLMultiPolyline.html">MGLMultiPolyline</a></code></td>
</tr>
<tr>
<td><code>Polygon</code></td>
<td><code><a href="Classes/MGLPolygon.html">MGLPolygon</a></code></td>
</tr>
<tr>
<td>Linear ring</td>
<td><code>MGLPolygon.coordinates</code>, <code><a href="Classes/MGLPolygon.html#/c:objc(cs)MGLPolygon(py)interiorPolygons">MGLPolygon.interiorPolygons</a></code></td>
</tr>
<tr>
<td><code>MultiPolygon</code></td>
<td><code><a href="Classes/MGLMultiPolygon.html">MGLMultiPolygon</a></code></td>
</tr>
<tr>
<td><code>GeometryCollection</code></td>
<td><code><a href="Classes/MGLShapeCollection.html">MGLShapeCollection</a></code></td>
</tr>
<tr>
<td><code>Feature</code></td>
<td><code><a href="Protocols/MGLFeature.html">MGLFeature</a></code></td>
</tr>
<tr>
<td><code>FeatureCollection</code></td>
<td><code><a href="Content Primitives.html#/c:objc(cs)MGLShapeCollectionFeature">MGLShapeCollectionFeature</a></code></td>
</tr>
</tbody></table>
<p>A <code>Feature</code> object in GeoJSON corresponds to an instance of an <code><a href="Classes/MGLShape.html">MGLShape</a></code>
subclass conforming to the <code><a href="Protocols/MGLFeature.html">MGLFeature</a></code> protocol. There is a distinct
<code><a href="Protocols/MGLFeature.html">MGLFeature</a></code>-conforming class for each type of geometry that a GeoJSON feature
can contain. This allows features to be used as raw shapes where convenient. For
example, some features can be added to a map view as annotations. Note that
identifiers and attributes will not be available for feature querying when a
feature is used as an annotation.</p>
<p>In contrast to the GeoJSON standard, it is possible for <code><a href="Classes/MGLShape.html">MGLShape</a></code> subclasses
other than <code><a href="Classes/MGLPointAnnotation.html">MGLPointAnnotation</a></code> to straddle the antimeridian.</p>
<p>The following GeoJSON data types correspond straightforwardly to Foundation data
types when they occur as feature identifiers or property values:</p>
<table><thead>
<tr>
<th>GeoJSON data type</th>
<th>Objective-C representation</th>
<th>Swift representation</th>
</tr>
</thead><tbody>
<tr>
<td><code>null</code></td>
<td><code>NSNull</code></td>
<td><code>NSNull</code></td>
</tr>
<tr>
<td><code>true</code>, <code>false</code></td>
<td><code>NSNumber.boolValue</code></td>
<td><code>Bool</code></td>
</tr>
<tr>
<td>Integer</td>
<td><code>NSNumber.unsignedLongLongValue</code>, <code>NSNumber.longLongValue</code></td>
<td><code>UInt64</code>, <code>Int64</code></td>
</tr>
<tr>
<td>Floating-point number</td>
<td><code>NSNumber.doubleValue</code></td>
<td><code>Double</code></td>
</tr>
<tr>
<td>String</td>
<td><code>NSString</code></td>
<td><code>String</code></td>
</tr>
</tbody></table>
</div>
</section>
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