Iphone core data updating
This factor in the design of the SQLite persistent store can create a performance issue.
An entity’s properties are its attributes and relationships, including its fetched properties (if it has any).
Much of Core Data’s functionality depends on the schema you create to describe your application’s entities, their properties, and the relationships between them.
Core Data uses a schema called a managed object model — an instance of .
Basically you define your data model in the Xcdatamodeld file that was created with your project. NOTE: If you haven’t tried insert and fetch, please follow Core Data in i OS10 (Swift3)Step 4: Update the User into Core Data Create a function to save the data, NOTE: I have updated object at zero index only.
NSPredicate can be used to find specific user, to update.
In general, the richer the model, the better Core Data is able to support your application.
Rather than implementing business logic common to all the entities several times over, you implement them in one place and they are inherited by the subclasses.These entities will be used in your application as the basis for the creation of managed objects ( Specify that an entity is abstract if you will not create any instances of that entity.You typically make an entity abstract if you have a number of entities that all represent specializations of (inherit from) a common entity that should not itself be instantiated.That source file will have the extension At this point you have created an entity in the model, but you have not created any data.Data is created later, when you launch your application.