iPhone app launch times and Core Data migration

Question

I have a Core Data application which I plan to update with a new schema. The lightweight migration seems to work, but it takes time proportional to the amount of data in the dat

Answer 1

You might put your Core Data updates into an NSOperation, which can be added to an operations queue in didFinishLaunching... and which can operate in the background, by overriding the operation's -main method.

Take a look at this tutorial page to get a general idea of what's involved. Use KVO with the operation's isFinished property to update the state of your application -- you might use this key's value to warn the user that the migration is still taking place, for example, before presenting any data.