Question

I have an NSArray of custom UIViews (ACTileView). They act as one row. I would like to be able to slide them left or right (which is currently already possible) but have the wrap-around (to create the effect of endless “Tiles” much like the UIDatePickerView on the iPhone). I don’t have any ideas anymore on how I can achieve this effect.

Help would be greatly appreciated
kind regards, JNK

Answer 1

I once did something similar with 50+ views one could page through. Clearly, for memory reasons you should not load all those views into an array if they are not visible.

So what I did was to have the amount of visible views +2 on each side in my array. Which each change of the position, I would update the array by popping one view off one side and adding the next one on the other side.

I put this logic into the scrollViewDidEndDecelerating delegate method of the UIScrollView, but you could also put it into scrollViewDidScroll and then check for the necessary adjustments of views.

You can re-assign an new NSArray each time and discard the old one, or do everything in a MSMutableArray.

If your views are all visible at the same time, use this method and just double the chain.