Please do not post the same thing multiple times. The board software automatically flags certain posts as needing moderator attention. This happens the most often for new users. I'm pretty sure this is made clear at the time you attempt to post. Posting the same thing over and over again just makes that many more posts the moderators have to weed through later. This makes us sad. Don't make us sad. If your post/thread doesn't appear, just wait a while. Don't post it again. If it hasn't shown up by the next day, then you can try again. I normally go through posts in the mornings, and try to check a few times throughout the day, but I'm not here 24/7. There will typically be a significant delay before posts are approved. Just be patient.
I do lot of animations in my iOS app using UIImageView.animationImages by passing an array of UIImage objects to the method listed below for animation. Current my array of UIImage objects contains separate PNG files. I know I can do similar animations by using & passing a Sprite Sheet instead of passing an array of separate PNG files. What are the advantages of one over another or Sprite Sheets are meant for a different purpose?