Create UISlider Programmatically in Swift

In this short Swift code example, you will learn how to create a UISlider Programmatically. The code example below will cover the following:

• Create UISlider programmatically,
• Position UISlider within a UIView,
• Set UISlider minimum and maximum values,
• Change UISlider tint color,
• Handle UISlider value changed event,
• Make UISlider sliding continuously,
• Make UISlider move in steps by 10 or making UISlider snap to specific values.

import UIKit
class ViewController: UIViewController {
    
    let step:Float=10 // If you want UISlider to snap to steps by 10
    
    override func viewDidLoad()
    {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        let mySlider = UISlider(frame:CGRect(x: 10, y: 100, width: 300, height: 20))
        mySlider.minimumValue = 0
        mySlider.maximumValue = 100
        mySlider.isContinuous = true
        mySlider.tintColor = UIColor.green
        mySlider.addTarget(self, action: #selector(self.sliderValueDidChange(_:)), for: .valueChanged)
        
        self.view.addSubview(mySlider)
        
    }
    
    @objc func sliderValueDidChange(_ sender:UISlider!)
    {
        print("Slider value changed")
        
        // Use this code below only if you want UISlider to snap to values step by step
        let roundedStepValue = round(sender.value / step) * step
        sender.value = roundedStepValue
        
        print("Slider step value \(Int(roundedStepValue))")
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    
}

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