interrupt()
Sends an interrupt signal to the receiver and all of its subtasks.
Declaration
func interrupt()Discussion
If the task terminates as a result, which is the default behavior, an didTerminateNotification gets sent to the default notification center. This method has no effect if the receiver was already launched and has already finished executing. If the system hasn’t launched the receiver, this method raises an NSInvalidArgumentException.
It isn’t always possible to interrupt the receiver because it might be ignoring the interrupt signal. The interrupt() method sends SIGINT.