ig-zoom-2.swift

/// Setup imageView
private func setupImageView() {
  
    // Set the image
    imageView.image = UIImage(named: "your-asset-name-here")
  
    // Resize the content
    imageView.contentMode = .scaleAspectFill
    imageView.layer.masksToBounds = true
  
    // That was for testing porpouse only
    // imageView.backgroundColor = .red

    // Constraints
    setupImageViewConstraints()
}

/// Setup ImageView constraints
private func setupImageViewConstraints() {
  
  // Disable Autoresizing Masks into Constraints
  imageView.translatesAutoresizingMaskIntoConstraints = false

  // Constraints
  NSLayoutConstraint.activate([
      imageView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
      imageView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
      imageView.centerYAnchor.constraint(equalTo: view.centerYAnchor),
      imageView.heightAnchor.constraint(equalToConstant: 250)
  ])
  
  view.layoutIfNeeded()
}