How to access iokit/pwr_mgt from swift?

Question

I'm trying to write an OSX app ( not iOS ) that prevents the system from going to sleep when certain things are happening. To do so, I'm trying to access the pwr_mgt submodule of IOKit from a MacOS app using Swift.

In XCode, I've indicated that I want to use the IOKit framework, and in code, I'm have declared import IOKit . Although IOKit's classes/methods import fine (I can see them with auto-complete when I type IO*Whatever), the ones relating to power management don't show up.

I've tried to instead import IOKit.pwr_mgt , but the compiler complains that the submodule can't be found.

<unknown>:0: error: missing required module 'pwr_mgt'

From other documentation for how to do this with Objective-c , the classes that I need to access (amongst others) are:

• IOPMAssertionCreateWithName
• IOPMAssertionID
• IOPMAssertionRelease
• CFStringRef
• CFSTR

Answer 1

I'm not sure if there is a solution to this problem in older Xcode betas, but on Beta 7 (and I imagine in Xcode 6.1 too)

import IOKit.pwr_mgt

works fine in newer betas.