CODEWITHSUNDEEP
iosfile
bluehallu
bluehallu

Reputation: 10275

How to simply store some files

I'm developing an app which needs to show some logos. These logos are just 8kb PNG files, and I'm just going to handle a little amount of them (10-20 at most). However, these are downloaded from the Internet because they might change. So, what I'm trying to achieve is, making the app to download them (done), storing them into the file system, and only downloading again whenever they change (might be months).

Everyone seems to use Core Data, which in my opinion is something designed for bigger and more complex things, because my files will always have the same name plus don't have relations between them.

Is the file system the way to go? Any good tutorial?

Upvotes: 0

Views: 74

Answers (2)

Jim
Jim

Reputation: 73936

Yes, the file system is probably your best option for this. You say that you've already implemented the downloading. How have you done so? With NSURLConnection? If so, then at some point, you have an NSData object. This has a couple of write... methods you can use to save the data to a file on the filesystem. Be sure to save the files in the right place, as your app is sandboxed and you can't write anywhere you like.

Upvotes: 1

RyanR
RyanR

Reputation: 7758

The advantage Core Data brings is efficiency. Using NSFetchedResultsController to display your logos in a tableview gets you optimized object loading and memory management. It will automatically load only the items which can be displayed on one screen, and as the user flicks through the table it will handle releasing items which move offscreen. Implementing that on your own is not a simple task.

If you want to build and display your data without Core Data, you'll probably want to use NSKeyValueCoder, which will allow you to easily write an array or dictionary of objects (including nested arrays, dictionaries, and images).

Upvotes: 0

Related Questions