tags:

views:

63

answers:

1
+1  Q: 

How to save data from version to version in iphone app development?

Hi, everyone. I'm new here. Now I'm having a problem for my app, a chinese-english dictionary. I'm now adding a wordbook for it, and try to save the contents of it to a plist every time users exit the app. But now I find that as my app updates, all these data will get lost because the path of the app is changed.

I'm now working for a company so the app will keep releasing new versions, and how can I save the data from version to version?

+2  A: 

all these data will get lost because the path of the app is changed.

That would indicate you're writing to your application's directory structure. Don't do that.

The iPhone has a documents directory.

Document Directory discussion

Wade Williams  2010-01-09 08:30:26
well I'm just using the following code to get the path NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; with these code I can get the path in the NSString documentsDirectory like "var/moblie/Applications/***/Documents". But my problem is that every time when I reinstall the app(or install a new version), the "***" part will be changed to another randomized string. That's why I said the path of the app is changed. thx anyway.
WoodJohn  2010-01-09 10:00:46
That may be true, but as it changes, the contents of the directory are copied along with it, so it should still be in that directory.
Ed Marty  2010-01-09 15:49:59

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