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# MapContentBuilder

A result builder that creates map content from closures you provide.

```
@resultBuilder struct MapContentBuilder
```

## Overview

The [`buildBlock(_:)`](/documentation/MapKit/MapContentBuilder/buildBlock(_:)-5ewn9) methods in this type create [`MapContent`](/documentation/MapKit/MapContent) instances based on the number and types of sources you provide as parameters.

You don’t use this type directly. Instead, SwiftUI annotates the `content` parameter of the various `MapView` initializers with the `@MapContentBuilder` annotation, implicitly calling this builder for you.

## Topics

### Map content builders

[`buildBlock()`](/documentation/MapKit/MapContentBuilder/buildBlock())

Creates an empty map content block that contains no statements.

[`buildBlock(_:)`](/documentation/MapKit/MapContentBuilder/buildBlock(_:)-5ewn9)

Creates a map content block that contains a single content result.

### Conditionally building map content

[`buildEither(first:)`](/documentation/MapKit/MapContentBuilder/buildEither(first:))

Compares content in a multistatement closure, resulting in use of the conditional content if the first argument you provide evaluates to  true.

[`buildEither(second:)`](/documentation/MapKit/MapContentBuilder/buildEither(second:))

Compares content in a multistatement closure, resulting in use of the conditional content if the second argument you provide evaluates to true.

[`buildExpression(_:)`](/documentation/MapKit/MapContentBuilder/buildExpression(_:))

Builds an expression within the map content builder.

[`buildIf(_:)`](/documentation/MapKit/MapContentBuilder/buildIf(_:))

Compares content in a multistatement closure, that produces an optional view that’s visible if the argument you provide evaluates to true.

[`buildLimitedAvailability(_:)`](/documentation/MapKit/MapContentBuilder/buildLimitedAvailability(_:))

Provides support for “if” statements with “available” macro clauses in multi-statement closures, producing conditional content for the “then” branch, such the conditionally-available branch.


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