> For the complete documentation index, see [llms.txt](https://multiset.gitbook.io/multiset/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://multiset.gitbook.io/multiset/native-support/ios-swift-native/api-reference.md).

# API Reference

This section provides detailed API documentation for the MultiSet iOS SDK components.

## Configuration

### [MultiSetConfig](/multiset/native-support/ios-swift-native/api-reference/multisetconfig.md)

A struct that provides centralized configuration for the MultiSet SDK. Controls credentials, localization behavior, object tracking settings, GPS hints, and UI feedback.

**Key Features:**

* Authentication credentials (clientId, clientSecret)
* Map configuration (mapCode, mapSetCode)
* Localization mode selection (single-frame, multi-frame)
* Localization behavior settings (auto-localize, background localization, relocalization)
* Multi-frame capture configuration
* Confidence thresholds
* GPS hint integration
* Localization hints to narrow Map / MapSet search (hintMapCodes, hintPosition, hintRadius)
* **Runtime configuration updates** — change Map / MapSet localization settings and apply them before the next query via `MultiSet.shared.updateConfig(_:)`
* Object tracking settings (objectCodes, auto-tracking, background tracking)
* UI feedback options
* Image quality settings

## Quick Reference

| Component            | Description                                       |
| -------------------- | ------------------------------------------------- |
| `MultiSetConfig`     | Centralized configuration for all SDK behavior    |
| `MultiSet`           | Main SDK singleton for initialization and control |
| `MultiSetARView`     | SwiftUI view wrapping ARKit ARView                |
| `MultiSetCallback`   | Protocol for SDK event callbacks                  |
| `LocalizationResult` | Result object containing localization pose data   |
| `LocalizationMode`   | Enum: `.singleFrame` or `.multiFrame`             |
| `TrackingState`      | Enum: `.tracking`, `.paused`, `.stopped`          |
| `GeoCoordinates`     | Geographic coordinate struct for GPS hints        |

## Related

* [Sample Views](/multiset/native-support/ios-swift-native/sample-views.md)
* [iOS SDK Overview](/multiset/native-support/ios-swift-native.md)


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