如何从远程服务器下载无限数量的图像并在UICollection View / UITableView中显示图像？

I want to display the infinite images in UITableView/UICollectionview, here the images will be received from remote server, I've done this by using GCD but it causes Memory issues and app got crash.Please help to fix it. Also I noticed some images aren't deallocated. Here is piece of code I've used to download images. I want to display the infinite images in UITabl