---
title: Alert Levels
framework: Core Foundation
role: collectionGroup
role_heading: API Collection
path: corefoundation/1534483-alert-levels
---

# Alert Levels

Flags identifying the seriousness of a user notification.

## Overview

Overview If you specify an icon to display in the dialog, this icon overrides the default icon used for each alert level.

## Topics

### Constants

- [kCFUserNotificationStopAlertLevel](corefoundation/kcfusernotificationstopalertlevel.md)
- [kCFUserNotificationNoteAlertLevel](corefoundation/kcfusernotificationnotealertlevel.md)
- [kCFUserNotificationCautionAlertLevel](corefoundation/kcfusernotificationcautionalertlevel.md)
- [kCFUserNotificationPlainAlertLevel](corefoundation/kcfusernotificationplainalertlevel.md)

## See Also

### Constants

- [Response Codes](corefoundation/1534504-response-codes.md)
- [Button Flags](corefoundation/1534481-button-flags.md)
- [Response Codes](corefoundation/1534504-response-codes.md)
- [Button Flags](corefoundation/1534481-button-flags.md)
- [Dialog Description Keys](corefoundation/dialog-description-keys.md)