问题
MacOS 10.14 (Mojave) features a Dark interface style, and user selectable color accents. How to read these values and listen for changes?
回答1:
This is stored in the system defaults, available through NSDistributedNotificationCenter.
Dark mode is active when AppleInterfaceStyle is set to Dark. Changes can be observed by listening for the InterfaceStyleChanged notification.
The accent color can be read from AppleAccentColor. Changes can be observed by listening for the AppleColorPreferencesChangedNotification notification. Both returns an optional integer, that maps to:
nil: blue
-1: graphite
0: red
1: orange
2: yellow
3: green
5: purple
6: pink
回答2:
The accent color is available as NSColor.controlAccentColor in macOS 10.14 or newer.
On NSView level you can implement event handler viewDidChangeEffectiveAppearance() to track accent color changes.
来源：https://stackoverflow.com/questions/51695755/how-can-i-determine-the-macos-10-14-accent-color