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core-animationtransitionnsviewcontroller

Is it possible to control the duration and timing function of a NSViewController transition?

I'm using NSViewController's transition(from:to:options:completionHandler:). It is working beautifully, but now I am wanting more control (like a custom timing function).

Is this possible? Or would it require another approach to transitioning between view controllers?

Solution

  • Yes, you can modify the animation context if you capture it in an animation group:

    NSAnimationContext.runAnimationGroup({ context in
    context.duration = 3

    parentController.transition(from: childA, to: childB: options: yourOptions, completionHandler: yourCompletionHandler)
})

    Unfortunately, it seems, modifying the context's timingFunction property doesn't do anything.

    For OS X 10.11 and older, you may use this shim: https://gist.github.com/BenLeggiero/63f84d5f7fd8c9b3c9501d1b68110983