[Swift] The process of registering the item selected in "UISegmentedControl" in Realm and displaying the registration data.

I got stuck about the above while creating the iOS App, so I will record it as a memorandum.

Process to register the item selected in "UISegmentedControl" to Realm

After setting "UISegmentedController" on the storyboard Describe the following sources in the target class.

ViewController.swift

@IBOutlet weak var test: UISegmentedControl! 
        //Specify the table created in RealmDB
        let results = realm.objects(testTable.self)
        //Specify table name
        let Test = testTable()
        //"UISegmentedControl"Select the item in"selectedIndex"Store in
        //In this case 0 if First is selected,1 is when Second is selected"selectedIndex"Stored in
        let selectedIndex = test.selectedSegmentIndex
        //Register with Realm object
        try! realm.write {
        　　Test.aaa = test.titleForSegment(at: selectedIndex)!
      　}

Processing to display the data registered in Realm with "UISegmentedControl"

ViewController.swift

@IBOutlet weak var test: UISegmentedControl! 
　//Specify the acquisition data destination
  let results = realm.objects(testTable.self).filter("Id == 1").first
        if results?.aaa == "First" {
            test.selectedSegmentIndex = 0
        }else if results?.aaa == "Second" {
            test.selectedSegmentIndex = 1
        }