FlutterViewController.
The

import

UIKit

import

Flutter

class

ViewController

UIViewController

override

func

viewDidLoad

()

super

viewDidLoad

()

// Make a button to call the showFlutter function when pressed.

let

button

UIButton

type

UIButton

ButtonType

custom

button

addTarget

self

action

#selector(

showFlutter

for

touchUpInside

button

setTitle

"Show Flutter!"

for