@NielsKoole
I just tried it out. I did not really look at the code, nor did I run it on an actual device. I merely pasted it in one of my projects in landscape mode, overlapping all the elements that were already in there. First, NK_SPIMAGESLIDER_SPEED seems to be undefined. No big deal, probably something you forgot :). There is also an "error" on the image on your tumblr page. Well error. Just blame my laziness. Let me rephrase that: it would be nicer if you typed
SPImageSlider* themeSlider =
instead of just
in order to have a coding sample that is more self-contained. Finally, it would seem that I can only scroll in one direction on the simulator. So the scroller starts at 1 and I can easily scroll through to image 5, but it seems to be a hit-and-miss whether or not my input is accepted to scroll back. May be a Simulator or landscape mode issue though ...
Regardless, nice work!