Strange issue on ipad

After using my app for sometime.Suddenly, few of the images disappear.Instead, I can see a black screen.Even the wall paper of ipad disappears.Please help!

My screen has image view with some image, next & previous button.Everytime user presses next/previous button audio file plays & image changes.If I am using it for a long time.I cannot see some of the images, while I can hear the audi开发者_如何学Co file

Its because of memory shortage.I fixed this issue by removing various leaks.Hope it helps!