Peek and Pop for 6s and 6s Plus (Like Instagram)

Hi all,

While doing Peek and Pop for 6s and 6s plus, I want to make a network call after displaying the Peek view controller and once I receive data, I want to update that Peek view controller with that data. This is similar to how Instagram shows their Peek view controller where they show some info and make a network call to get all the images and once the images are downloaded, they are shown. Any idea on how can I achieve that? Thanks a lot in advance.