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UIKit Framework

Base View

import UIKit

class SecondViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        view.backgroundColor = .red //Shortcut for UIColor.red
        
        let label = UILabel()
        label.text = "Hello"
        label.frame = CGRect(x: 0, y: 0, width: 100, height: 50)

        // add the label to the view. addSubview needs a view as param. As UILabel inherits from UIView it's possible
        view.addSubview(label) 
        
    }
}