---
title: identifier
framework: clockkit
role: symbol
role_heading: Instance Property
path: clockkit/clkcomplication/identifier
---

# identifier

An identifier that specifies a complication if your app supports multiple complications per family.

## Declaration

```swift
var identifier: String { get }
```

## Mentioned in

Creating a timeline entry

## Discussion

Discussion In watchOS 7 and later, ClockKit represents a complication by its family and its CLKComplicationDescriptor. Descriptors often represent categories of information that the complication can display. For example, a weather app may support Condition, Temperature, and Precipitation descriptors. let ComplicationConditionIdentifier = "ComplicationTypeCondition" let ComplicationTemperatureIdentifier = "ComplicationTypeTemperature" let ComplicationPrecipitationPercentageIdentifier = "ComplicationTypePrecipitationPercentage" For apps created for watchOS 6 or earlier, the system automatically sets the configuration’s identifier property to CLKDefaultComplicationIdentifier if you don’t implement your data source’s getComplicationDescriptors(handler:) method. Similarly, the system sets the identifier to CLKDefaultComplicationIdentifier if the complication came from a shared watch face, but the sender chose to exclude private information. Because default identifiers can come from shared watch faces, your data source’s getCurrentTimelineEntry(for:withHandler:) and getTimelineEntries(for:after:limit:withHandler:) methods must check for the CLKDefaultComplicationIdentifier value, and provide generic complication entries when it occurs.

## See Also

### Accessing Data About the Complication

- [family](clockkit/clkcomplication/family.md)
- [userActivity](clockkit/clkcomplication/useractivity.md)
- [userInfo](clockkit/clkcomplication/userinfo.md)