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z-xhx
z-xhx
Participating Frequently
Feb 10, 2015 5:05 AM UTC
Question

What is the best way to do permanent local storage of small bits of data on mobile?

My app has a consumable item for purchase. Once purchased, it is consumed immediately, and the item's location is then permanently stored in the app.

What is the best way to achieve this? Should I use something like SharedObject, or do the contents of those get cleared when the app version updates?

Thanks for any help or ideas.

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2 replies

Colin Holgate
Colin Holgate
Inspiring
Feb 10, 2015 3:20 PM UTC

Local testing will most likely clear the sharedobject, but App Store updates shouldn't.

In any case, you need to provide a Restore Purchases option, so that if the user deletes the app and then installs it again, they have a way to retrieve the purchase.

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Julien26
Inspiring
Feb 10, 2015 8:52 AM UTC

In my app I use a SharedObject to store some informations and when I deploy a new version on my Ipad to test it the SharedObject is cleared

I my case I have a large amount of data (let's say between 400MB and 2GB of media files) that the user can download in the app and I store it in a folder in File.documentsDirectory but each time I deploy my app on iOS the folder is deleted and I have to download everything again. I suppose that it will be the same when I publish app updates on the AppStore. What should I do to keep the file between updates ?

It's not a problem if the files are cleared when the system needs space, but if it's cleared when the app is updated it's quite annoying

Thanks in advance

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