iphone - saving data to plist across multiple views -

I am currently working on an application that users see many different ways to get user information And I just got a problem. My current method saves every user extension against a key value in the plist file, the problem is that when the user switches to another view and saves its data again, the old key and data are overwritten.

The question is whether it is more efficient, a) There is a separate flist for each separate scene or b) First of all read the existing data from the file, then return the data back to the file with new details. Save. In the end, I would like to export all these things as XML, although it should not be very difficult to read many files.

Thanks in advance!

This is probably the most scarce resource memory on the iPhone, and it will probably be more efficient to use multiple files, and Loading a large flist can probably be of very much use. Using multiple files means that you do not have to load all the plists in memory at once. If you have a lot of data, then I also suggest that keeping an eye on core data eventually.