AudioServicesAddSystemSoundCompletion(_:_:_:_:_:)
Registers a callback function that is invoked when a specified system sound finishes playing.
Declaration
func AudioServicesAddSystemSoundCompletion(_ inSystemSoundID: SystemSoundID, _ inRunLoop: CFRunLoop?, _ inRunLoopMode: CFString?, _ inCompletionRoutine: AudioServicesSystemSoundCompletionProc, _ inClientData: UnsafeMutableRawPointer?) -> OSStatusParameters
- inSystemSoundID:
The system sound that your callback function is to respond to.
- inRunLoop:
The run loop in which the callback function should run. Pass
NULLto use the main run loop. - inRunLoopMode:
The mode for the run loop in which the callback functions should run. Pass
NULLto use the default run loop mode. - inCompletionRoutine:
The callback function to be invoked when the specified system sound has finished playing.
- inClientData:
Application data to be passed to your callback function when it is invoked. Can be
NULL.
Return Value
A result code.
Discussion
Because a system sound may play for several seconds, you might want to know when it has finished playing. For example, you may want to wait until a system sound has finished playing before you play another sound.