realm Getting started with realm Swift

Example

Create Object Class:

class Dog: Object {
    dynamic var name = ""
    dynamic var age = 0
}   

Assign Object's Values:

let dog = Dog()
dog.name = "Rex"
dog.age = 1

Save Object:

let realm = try! Realm()
try! realm.write {
    realm.add(dog)
}

Reading Objects:

let realm = try! Realm()
let pups = realm.objects(Dog.self)

Filtering Objects:

let realm = try! Realm()
let filteredPups = realm.objects(Dog.self).filter("age < 2")

Counting Objects:

let realm = try! Realm()
let pupsCount = realm.objects(Dog.self).count