Photo gallery like in the VK application?

Question

Objective-C

Good evening!
In the application being developed, you need to add a photo viewer. I want the functionality like in VKontakte, those: 1) Opening with a flap (it also opens like this on Twitter) 2) closing with a swipe up / down 3) thumbnail view mode in the grid 4) viewing / zooming large photos. I also saw such a gallery in TJournal.
There are an unrealistic number of ready-made galleries , but none of them meets all the requirements.
Of course, you can write your own, but I don’t want to fence the bike ahead of time.
Has anyone come across something similar?

Answer 1

There is such a library of galleries .

Answer 2

It seems to me that the VK gallery itself was finished.
I have not seen a single ready-made galleries, I am finishing it myself. Based on one of

Answer 3

Look like this