CoreData.txt

To retrieve data from Core Data
        
let manageContext = appDelegate.managedObjectContext
        
// 2
let fetchRequest = NSFetchRequest(entityName: "YourEntityName")
        
        
// 3
do {
            
    let results = try manageContext.executeFetchRequest(fetchRequest)
            
    somethings = results as [NSManagedObject]
            
} catch let error as NSError {
    print("Could not save \(error), \(error.userInfo)")
}


To save data to Core Data

let managedContext = appDelegate.managedObjectContext
        
// 2
let entity = NSEntityDescription.entityForName("YourEntityName", inManagedObjectContext: managedContext)
        
let something = NSManagedObject(entity: entity, insertIntoManagedObjectContext: managedContext)
        
// 3
task.setValue(SomeValue, forKey: "YourAttributeName")
task.setValue(SomeValue, forKey: "YourAttributeName")


// 4
do {
            
    try managedContext.save()
            
    // 5
    somethings.append(something)
            
} catch let error as NSError {
    print("Could not save \(error), \(error.userInfo)")
}