iPhone: cached profile images from the web - how to find out that remote image changed?
- by Stefan Klumpp
I'm loading profile pictures from Facebook, cache them on disk and load them into cells of a UITableView.
Now I'm wondering, how I can find out when someone has changed his/her profile picture on Facebook that I have to load the new image from the web instead of using the one cached disk.
The url of the image is always the same. Is there a lightweight way of doing this without downloading the image and comparing it to the local file?