Friday, January 10, 2020

Observing Appearance Changes

Jesse Squires:

I needed to get notified when the system appearance changed. On iOS, this is very straight-forward and a first-class API. On iOS 13, the interface style is part of UITraitCollection.


[On macOS,] you can KVO on NSApp.effectiveappearance. […] Using KVO still does not feel great, but this is the best solution I could find without having an explicit API like iOS.


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