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# UNNotificationInterruptionLevel

Constants that indicate the importance and delivery timing of a notification.

```
enum UNNotificationInterruptionLevel
```

## Topics

### Enumeration Cases

[`UNNotificationInterruptionLevelActive`](/documentation/UserNotifications/UNNotificationInterruptionLevel/active)

The system presents the notification immediately, lights up the screen, and can play a sound.

[`UNNotificationInterruptionLevelCritical`](/documentation/UserNotifications/UNNotificationInterruptionLevel/critical)

The system presents the notification immediately, lights up the screen, and bypasses the mute switch to play a sound.

[`UNNotificationInterruptionLevelPassive`](/documentation/UserNotifications/UNNotificationInterruptionLevel/passive)

The system adds the notification to the notification list without lighting up the screen or playing a sound.

[`UNNotificationInterruptionLevelTimeSensitive`](/documentation/UserNotifications/UNNotificationInterruptionLevel/timeSensitive)

The system presents the notification immediately, lights up the screen, can play a sound, and breaks through system notification controls.

## Relationships

### Conforms To

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

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

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

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

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

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

---

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