Programmatically wake display on OSX

问题

I've managed to get the display to sleep immediately with

pmset displaysleepnow

in terminal, however for waking the display I've only found

pmset schedule wake "12/24/2009 00:00:00" 

which fails to work if I try to schedule anything earlier than at least 10secs from now.

Is there any way to programmatically wake the display in Cocoa? Someone has suggested IOPMAssertionDeclareUserActivity but I couldn't find any examples on this so I am struggling.

I am using Swift by the way, but Objective C code is also welcome.

回答1:

Got it working with:

  IOPMAssertionID assertionID; 
  IOPMAssertionDeclareUserActivity(CFSTR(""), kIOPMUserActiveLocal, &assertionID);

回答2:

Here is the answer in Swift 3.x:

var assertionID : IOPMAssertionID = 0
 _ = IOPMAssertionDeclareUserActivity("" as CFString, kIOPMUserActiveLocal, &assertionID)

来源：https://stackoverflow.com/questions/26226026/programmatically-wake-display-on-osx