Demo Core Data For Beginners Swift

Core Data is an object graph and persistence framework provided by Apple in the macOS and iOS operating systems. It was introduced in Mac OS X 10.4 Tiger and iOS with iPhone SDK 3.0. It allows data organized by the relational entity–attribute model to be serialized into XML, binary, or SQLite stores.

Core Data:

• Don’t have Data Constraints,if required need to implement by business logic.

• Operates on in memory.(data needs to be loaded from disk to memory)

• Need to load entire data if we need to drop table or update.

• Fast in terms of record creation.(saving them may be time consuming

Core Data Demo

Config Entity Name In App Delegate

Create Records to Core Data

The process of adding the records to Core Data has following tasks

• Refer to persistentContainer from appdelegate

• Create the context from persistentContainer

• Create an entity with User

• Create new record with this User Entity

• Set values for the records for each key

decalare global in vc

Retrieve Data

The process of fetching the saved data is very easy as well.

Update Data

For update record first we have to fetch/Retrieve data with predicate as same as above Retrieve data process.

Delete Data

For delete record first we have to find object which we want to delete by fetchRequest.

All Well Done. I hope you get what you want !!!

Get full code here: https://gitlab.com/vanchaynheng168/ios-note