add person

let appDelegate = UIApplication.sharedApplication().delegate as? AppDelegate
        appDelegate?.managedObjectContext.performBlock({
            let person = NSEntityDescription.insertNewObjectForEntityForName("Person", inManagedObjectContext: (appDelegate?.managedObjectContext)!) as! Person
            person.name = "Sandeep"
            person.age = NSNumber(integer:  Int(26))
            person.nickname = "Sandeep"
            person.phone = "1234567890"
            try! appDelegate?.managedObjectContext.save()
            self.dismissViewControllerAnimated(true, completion: nil)
        })