<!--
{
  "availability" : [
    "iOS: 14.0.0 -",
    "iPadOS: 14.0.0 -",
    "macCatalyst: 14.0.0 -",
    "watchOS: 7.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "ClockKit",
  "identifier" : "/documentation/ClockKit/CLKWatchFaceLibrary",
  "metadataVersion" : "0.1.0",
  "role" : "Class",
  "symbol" : {
    "kind" : "Class",
    "modules" : [
      "ClockKit"
    ],
    "preciseIdentifier" : "c:objc(cs)CLKWatchFaceLibrary"
  },
  "title" : "CLKWatchFaceLibrary"
}
-->

# CLKWatchFaceLibrary

An object for importing watch faces that the app provides.

```
class CLKWatchFaceLibrary
```

## Overview

Use a [`CLKWatchFaceLibrary`](/documentation/ClockKit/CLKWatchFaceLibrary) object to add an existing .`watchface` file to the Watch app. Add watch faces only on devices that support pairing with an Apple Watch.

## Topics

### Importing a Watch Face

[`func addWatchFace(at: URL, completionHandler: ((any Error)?) -> Void)`](/documentation/ClockKit/CLKWatchFaceLibrary/addWatchFace(at:completionHandler:))

Adds a watch face from the app’s bundle.

### Handling Errors

[`class let ErrorDomain: String`](/documentation/ClockKit/CLKWatchFaceLibrary/ErrorDomain)

The domain for errors while importing watch faces.

[`enum ErrorCode`](/documentation/ClockKit/CLKWatchFaceLibrary/ErrorCode)

Error codes that the watch face library returns.

## Relationships

### Conforms To

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`Equatable`](/documentation/Swift/Equatable)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`CVarArg`](/documentation/Swift/CVarArg)

[`Hashable`](/documentation/Swift/Hashable)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)