Creates a custom sound object for critical alerts with the specified volume.
- iOS 12.0+
- macOS 10.14+
- Mac Catalyst 13.0+
The name of the sound file to play. This file must be located in the current executable’s main bundle or in the
Library/Soundsdirectory of the current app container directory. If files exist at both locations, the system uses the file from the
Library/Soundsdirectory. This parameter must not be
The volume must be a value between 0.0 and 1.0.
A sound object representing a custom critical alert sound at the specified volume.
Critical alerts ignore the mute switch and Do Not Disturb. They require a special entitlement issued by Apple.