如何在iOS中正确管理大量图像

Question

In my application i display quite a large amount of images approximately 200, sooner or later I'm getting memory warning but I don't know what to do next

I have a subclass of UIImageView that downloads images asynchronously and displays them like this

self.image = [[[UIImage alloc] initWithData:receivedData] autorelease];

How and when should I clean up the memory?

Thanks in advance.

Answer 1

Try use a small images in list. On click on small image, show a large image. Try use optimization methods for this case:)

Answer 2

once all images are downloaded they are all on the screen

Composite what you can (into one image), ideally on the server side so you have less to download, load into memory, and render on the client side.

As well, make sure the images are the size you will draw them at. This can save a lot of memory and also processing (unless you are using shoddy or fast rescaling).

There's a lot of context missing in your post. If a solution were universal and trivial, would you not assume there's a good chance it's already being used by the system's frameworks?