NSManagedObject 的两个初始值设定项有什么区别

Question

If somebody could please help me on what is the difference on creating an object of NSManagedObject subclass from these initialization methods:

init(context:)

vs

init(entity:insertInto:)

Thanks.

Answer 1

It's about implicitly and explicitly specifying entity name so

guard let appDelegate =
    UIApplication.shared.delegate as? AppDelegate else {
        return
}

let managedContext =
    appDelegate.persistentContainer.viewContext

1- This will create an object from entity named Person represented by class CustomObj and inserts it in managedContext

let entity =
    NSEntityDescription.entity(forEntityName: "Person",
                               in: managedContext)!

let person1 = CustomObj(entity: entity, insertInto: managedContext)

2- This will create an object from class CustomObj where entity name is CustomObj and inserts it in managedContext

let person2 = CustomObj(context: managedContext)

---

class CustomObj:NSManagedObject {

}