使用Core Data时需要本地数组吗？

Question

I'm currently writing my first iOS app and I'm trying to implement Core Data. Users create food recipes and I want them saved to persistent storage.

Currently, without Core Data, I'm putting the recipes into an array from a singleton.

When I implement Core Data can I do away with this and fetch straight from the data model every time I need to update my UITableView ? In the viewDidLoad method, create an array from the current data in Core Data every time a user navigates to it?

Answer 1

Yes you can.

You should look at the class NSFetchedResultsController it is designed to do this.

There is a great Ray Wenderlich tutorial which covers everything including things like automatically updating the table when the core data model changes etc...