Create UISwitch in Swift Programmatically

This short example demonstrates how to create a UISwitch in Swift programmatically.

The Swift code snippet below will coder the following:

• Create UISwitch in Swift programmatically,
• How to position UISwitch on a view,
• How to set UISwitch state to On and Off,
• How to call your custom function when UISwitch state changes.

import UIKit
class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        let switchDemo=UISwitch(frame:CGRect(x: 150, y: 150, width: 0, height: 0))
        switchDemo.addTarget(self, action: #selector(self.switchStateDidChange(_:)), for: .valueChanged)
        switchDemo.setOn(true, animated: false)
        self.view.addSubview(switchDemo)
        
    }
    
    @objc func switchStateDidChange(_ sender:UISwitch!)
    {
        if (sender.isOn == true){
            print("UISwitch state is now ON")
        }
        else{
            print("UISwitch state is now Off")
        }
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
}

For more Swift code examples and tutorials, please check the Swift Code Examples page on this website.