Using UISlider to retrieve a value at regular intervals (Swift5.0)

0, 0.5, 1.0, 1.5 ….. The following is a sample code to get the value at regular intervals of 0, 0, 5, 1, 0, 1, 1, 0, 1, 1, 5, and so on with UISlider.

alt

	import UIKit

	class UISliderRoundValue_20190523: UIViewController {

	var sliderValue: UILabel!

	override func viewDidLoad() {
	super.viewDidLoad()

	view.backgroundColor = .white

	let initialValue: Float = 8.0
	let width = view.frame.width
	let height = view.frame.height

	let slider = UISlider()
	slider.minimumValue = 0.0
	slider.maximumValue = 10.0
	slider.value = initialValue
	slider.tintColor = .orange
	slider.frame = CGRect(x: width * 0.1, y: height * 0.2, width: width * 0.8, height: height * 0.1)
	slider.addTarget(self, action: #selector(sliderDidChangeValue(_:)), for: .valueChanged)
	view.addSubview(slider)

	sliderValue = UILabel()
	sliderValue.frame = CGRect(x: width * 0.1, y: height * 0.4, width: width * 0.8, height: height * 0.1)
	sliderValue.textAlignment = .center
	sliderValue.text = String(initialValue)
	view.addSubview(sliderValue)
	}

	@objc func sliderDidChangeValue(_ sender: UISlider) {
	let roundValue = roundf(sender.value * 2.0) * 0.5

	// set round value
	sender.value = roundValue
	sliderValue.text = String(roundValue)
	}
	}

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