IOS Swift Lazy Loading

Why bother lazy loading and purging pages, you ask? Well, in this example, it won ' t matter too much if you load all the pages at the start, since there is only five and they Won ' t is large enough to eat up too much memory. But imagine you had pages and each image is 5MB in size. That would take up 500MB of memory if you loaded all the pages at once! Your app would quickly exceed the amount of memory available and is killed by the operating system. Lazy loading means that you'll only have a certain number of pages in memory at any given time.

IOS Swift Lazy Loading