如何使用滑块更改Swift中的背景色？

let slider = UISlider(frame: CGRect(x: 50, y: 100, width: 200, height: 20))
slider.minimumValue = 0.0
slider.maximumValue = 1.0
slider.value = 0.5

slider.addTarget(self, action: #selector(sliderValueChanged(_:)), for: .valueChanged)

@objc func sliderValueChanged(_ sender: UISlider) {
    let value = CGFloat(sender.value)
    view.backgroundColor = UIColor(red: value, green: value, blue: value, alpha: 1.0)
}

view.addSubview(slider)