I am developing an app in Xcode on Mac and would like to know the event which is fired when the mac gets back from sleep. AwakeFromNib doesn't seem to work.
asked Feb 12, 2012 at 9:22
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3 Answers
For swift 3:
func onWakeNote(note: NSNotification) {
print("Received wake note: \(note.name)")
}
func onSleepNote(note: NSNotification) {
print("Received sleep note: \(note.name)")
}
func fileNotifications() {
NSWorkspace.shared().notificationCenter.addObserver(
self, selector: #selector(onWakeNote(note:)),
name: Notification.Name.NSWorkspaceDidWake, object: nil)
NSWorkspace.shared().notificationCenter.addObserver(
self, selector: #selector(onSleepNote(note:)),
name: Notification.Name.NSWorkspaceWillSleep, object: nil)
}
For swift 4:
@objc func onWakeNote(note: NSNotification) {
...
}
@objc func onSleepNote(note: NSNotification) {
...
}
func fileNotifications() {
NSWorkspace.shared.notificationCenter.addObserver(
self, selector: #selector(onWakeNote(note:)),
name: NSWorkspace.didWakeNotification, object: nil)
NSWorkspace.shared.notificationCenter.addObserver(
self, selector: #selector(onSleepNote(note:)),
name: NSWorkspace.willSleepNotification, object: nil)
}
Just found it:
- (void) receiveWakeNote: (NSNotification*) note
{
NSLog(@"receiveSleepNote: %@", [note name]);
}
- (void) fileNotifications
{
//These notifications are filed on NSWorkspace's notification center, not the default
// notification center. You will not receive sleep/wake notifications if you file
//with the default notification center.
[[[NSWorkspace sharedWorkspace] notificationCenter] addObserver: self
selector: @selector(receiveWakeNote:)
name: NSWorkspaceDidWakeNotification object: NULL];
}
answered Feb 12, 2012 at 9:35
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Two things: you want "nil" not "NULL" for your object, and you should format your answer to display your code as formatted code - it's pretty unreadable right now. But good job answering your own question! Commented Feb 12, 2012 at 9:39
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How can I properly format the code ? I don't know the tag required... Thanks ! Commented Feb 12, 2012 at 13:08
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1Looks like Parag beat you to it. But in the future, look at the buttons in the editor. One of them is a pair of braces ("{}"). Use this to format a selected block of text as code. Commented Feb 12, 2012 at 18:18
You can use IORegisterForSystemPower().
Connects the caller to the Root Power Domain IOService for the purpose of receiving sleep & wake notifications for the system. Does not provide system shutdown and restart notifications.
io_connect_t IORegisterForSystemPower (
void *refcon,
IONotificationPortRef *thePortRef,
IOServiceInterestCallback callback,
io_object_t *notifier ) ;
Take a look at Q:How can my application get notified when the computer is going to sleep or waking from sleep? How to I prevent sleep?
answered Feb 12, 2012 at 14:00
