问题
I found this code to set the system volume using Swift. While using the code in a playground I got warning.
AudioHardwareServiceSetPropertyData was deprecated in OS X 10.11
How do I update the code for OS X 10.11?
Thanks. :)
回答1:
As also suggested in this answer to a similar Objective-C question, I'd suggest using ISSoundAdditions, which you can call from Swift as such:
NSSound.setSystemVolume(0.5)
The implementation of -setSystemVolume begins around line 113 in ISSoundAdditions.m in case you're curious of how they accomplish setting the system volume.
To clarify a factually challenged comment to my answer (since deleted, apparently), there is no use of deprecated APIs in ISSoundAdditions when compiling with the El Capitan SDK – AudioHardwareServiceSetPropertyData is not used. AudioObjectSetPropertyData is indeed the API one should switch to if using the deprecated AudioHardwareServiceSetPropertyData, though as you can see from the ISSoundAdditions implementation I linked to, there's a bit of work involved (hence I linked to the implementation in the first place).
来源：https://stackoverflow.com/questions/36953948/set-os-x-volume-in-os-x-10-11-using-swift-without-using-the-deprecated-audiohard