Type Property


The default sound used for critical alerts.


@NSCopying class var defaultCritical: UNNotificationSound { get }


Critical alerts ingore the mute switch and Do Not Disturb. They require a special entitlement issued by Apple.

See Also

Getting Critical Sounds

class func defaultCriticalSound(withAudioVolume: Float) -> Self

Creates a sound object that plays the default critical alert sound at the specified volume.

class func criticalSoundNamed(UNNotificationSoundName) -> Self

Creates a custom sound object for critical alerts.

class func criticalSoundNamed(UNNotificationSoundName, withAudioVolume: Float) -> Self

Creates a custom sound object for critical alerts with the specified volume.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software