Considering this scenario, the user downloads a zip file after an app purchase A. Then he updates the application for the new version.
Now, is it to download the Ziff file again or is it still in the device?
Another question: How do I verify that the zip file is downloaded?
The file is still on the device:
While upgrading, only the app Binary is replaced ( .app ). Stay tuned to the Documents directory and user default are insulated between two versions.
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