Nov 05

iOS 5 has brought very many changes for users and developers, but a good portion of them were presented by Apple. One very important has to do with how the application saves the data in cache and how the cache is deleted. Apple has iOS 5 removal system cache automatically when the available space from our device falls below a certain value. When that value is reached, the system goes off and deletes all the cache with all data from it. With iOS 5 this does not happen and in cache were stored important data and saved by Instapaper, for example, to read offline.

A common scenario: an Instapaper customer is stocking up an iPad for a long flight. She syncs a bunch of movies and podcasts, downloads some magazines, and buys a few new games, leaving very little free space.

Basically iOS 5 delete all the cache along with data from device when the available space reaches a certain value. In iOS 5 Apple solved the problem by giving users the developers can mark certain files so that removal system to move over them and leave them in the system. Change is important because in applications such as Instapaper saved articles will remain there but the same little thing is going to happen and many other data available in our iDevice.

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