Shows basic use of Icon Font on a UILabel. Also demonstrates basic constraints in code.

ViewController.swift

import UIKit

class RootViewController: UIViewController {
    //MARK: Properties
    let label = UILabel(frame: .zero)
    
    //MARK: Lifecycle
    override func viewDidLoad() {
        super.viewDidLoad()
        //Set up label
        self.label.translatesAutoresizingMaskIntoConstraints = false
        self.label.textAlignment = .center
        self.label.font = IconFont().iconFont(50)
        self.label.text = IconFont().arrow_right
        self.label.textColor = UIColor.red
        //Set up view
        self.view.addSubview(self.label)
        self.view.backgroundColor = UIColor.white
        self.label.topAnchor.constraint(equalTo: self.view.topAnchor, constant: 0).isActive = true
        self.label.rightAnchor.constraint(equalTo: self.view.rightAnchor, constant: 0).isActive = true
        self.label.bottomAnchor.constraint(equalTo: self.view.bottomAnchor, constant: 0).isActive = true
        self.label.leftAnchor.constraint(equalTo: self.view.leftAnchor, constant: 0).isActive = true
    }
    
    //MARK: Functions

    
}