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The video tutorial is nice but I fail to see how it's any easier to do with pop than just with CA. (I've been a Obj-C/Cocoa dev for 8 years)

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It isn't much better for simple animations like this but I find it much easier for complex, gesture-based, dynamic animations that can change at any time based on user input.

Makes sense.

Also a designer can tell a dev exactly what he/she wants in terms of animation values (assuming they're using origami)

> Also a designer can tell a dev exactly what he/she wants in terms of animation values (assuming they're using origami)

Thank you for introducing me to Origami! My time on HN today was not wasted.

(It's at https://facebook.github.io/origami/ if somebody else reading this also did not know about it.)

Given that much of the Paper prototyping was done in Origami, this was my first thought when I saw this library. I haven't actually used Paper yet (it's still US-only) but I'm in love with these kinds of tactile, fun interfaces.

I think the main difference is they are easy to interrupt and continue from the current real position, where doing that with CA is more difficult. That would let you do some nifty stuff with gestures, I guess.

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