---
title: activeComplications
framework: clockkit
role: symbol
role_heading: Instance Property
path: clockkit/clkcomplicationserver/activecomplications
---

# activeComplications

The active complications for the current app.

## Declaration

```swift
var activeComplications: [CLKComplication]? { get }
```

## Mentioned in

Keeping your complications up to date

## Discussion

Discussion This property contains an array of CLKComplication objects; each represents a version of your complication currently displayed on the clock face. If the property contains an empty array, it means your app has no complications on the active watch face. If it’s nil, it means the server is still connecting to the active complications. There are no guarantees on when the server will connect with the complications. ClockKit sends a CLKComplicationServerActiveComplicationsDidChangeNotification notification when the server connects, and the system guarantees that the activeComplications property has a non-nil value after it sends the notification. To avoid any race conditions, always perform the following steps in order: Set up an observer for the CLKComplicationServerActiveComplicationsDidChangeNotification notification. Check and see if activeComplications contains a nil value. If activeComplications has a non-nil value, you can use it immediately. Otherwise, wait for the notification to fire, and then check the activeComplications property again. The following code listing shows a safe implementation using Swift’s asynchronous APIs. extension CLKComplicationServer {          // Safely access the server's active complications.     @MainActor     func getActiveComplications() async -> [CLKComplication] {         return await withCheckedContinuation { continuation in                          // First, set up the notification.             let center = NotificationCenter.default             let mainQueue = OperationQueue.main             var token: NSObjectProtocol?             token = center.addObserver(forName: .CLKComplicationServerActiveComplicationsDidChange, object: nil, queue: mainQueue) { _ in                 center.removeObserver(token!)                 continuation.resume(returning: self.activeComplications!)             }                          // Then check to see if we have a valid active complications array.             if activeComplications != nil {                 center.removeObserver(token!)                 continuation.resume(returning: self.activeComplications!)             }         }     } }