[Swift] Simple screen transition summary

pattern

--Screen transition when the button is pressed --Screen transition under conditions --Screen transition by passing variables

I might add it.

Screen transition when the button is pressed

1. Install buttons like "NEXT" or "Next".
2. Click the button while pressing the control key and drag and drop it on the screen you want to transition to.

3. Then an option will appear, so select it.

Screen transition by condition

1. Click the icon at the top while pressing the control key and drag and drop it on the screen you want to transition to.

2. As with "3" above, options will appear, so select them.

3. Click the screen transition arrow (called "Segue") and give it a name (or ID) with Identifier.

4. Write the code in if

ViewController.swift

if conditional expression{
      //Write the ID set in "3"
      performSegue(withIdentifier: "next", sender: nil)
    }

Screen transition by passing variables

1. Write a method for prepare to prepare to pass the value

If you select the one that says prepare, it will be completed automatically.

hand over

ViewController.swift

  //Variable you want to pass
  var face = "(´ ・ ω ・ ｀)"

  override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    //Write the controller name of the transition destination. Here NextViewController
    let nextVC = segue.destination as! NextViewController
    
    //Substitute the variable you want to pass to the variable name (described later) defined at the receiving destination
    nextVC.nextFace = face
  }

receive

 NextViewController.swift

  //For example, set up a Label and receive it there
  @IBOutlet weak var nextLabel: UILabel!
  var nextFace = ""

  override func viewDidLoad() {
        super.viewDidLoad()

      nextLabel.text = nextFace
    }

(´ ・ ω ・ ｀) is displayed on the transition destination Label. In a practical place, I think it is better to pass the calculated answer or the transition destination.