Create UIButton Programmatically

This is a very short example but contains a lot of useful details like:

  • Create UIButton programmatically in Swift
  • Position UIButton on a view
  • Add an action to UIButton, so that when it is tapped your function is called
  • Set UIButton Title for specific UIControlState
  • Change UIButton background colour
  • Change UIButton foreground text colour
    
import UIKit

class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        let button = UIButton(type: UIButtonType.system) as UIButton
        
        let xPostion:CGFloat = 50
        let yPostion:CGFloat = 100
        let buttonWidth:CGFloat = 150
        let buttonHeight:CGFloat = 45
        
        button.frame = CGRect(x:xPostion, y:yPostion, width:buttonWidth, height:buttonHeight)
        
        button.backgroundColor = UIColor.lightGray
        button.setTitle("Tap me", for: UIControlState.normal)
        button.tintColor = UIColor.black
        button.addTarget(self, action: #selector(ViewController.buttonAction(_:)), for: .touchUpInside)
        
        self.view.addSubview(button)
    }
    
    func buttonAction(_ sender:UIButton!)
    {
        print("Button tapped")
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    
}


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