I'm currently developing Quick Look thumbnail and preview extensions for my custom file types on iOS. Works pretty well, although the 120 MB memory limit is sometimes a road block for huge / complex files.
But so far I couldn't figure out how to impement a UIGestureRecognizer which allows the user to swipe from one preview to the next. Apple supports this with its default preview for unknown file types, showing only the file name and size. Unfortunately neither the documentation nor the several WWDC videos are refering to gestures, and there is literaly zip information on the web (except Apple's)... Looks like only very few developers are currently supporting Quick Look on iOS for their file types.
Any help or pointers into the right direction are much appreciated!