How do you exclude a specific UIButton from an extension in Swift? - ios

Question

I am a beginner so bear with me.
I created a basic timer app and rounded the corners of two buttons. The button was still clickable outside of the circle, I needed to fix that so I found a solution online that said to insert the code into the UIButton's subclass or extension. I found solutions for both ways and chose extension option because the code was easier to read and I could understand it better.
The issue now is that I have a third UIButton that is being affected by the extension and I would like to exclude it. I'm not sure if this is even practical (or possible) so please correct me if there is a better way to approach this. The button I need to exclude from the extension is resetButton.
import UIKit
extension UIButton {
open override func draw(_ rect: CGRect) {
self.layer.cornerRadius = 50.0
self.layer.masksToBounds = true
//exclude resetButton???
}
private var touchPath: UIBezierPath {return UIBezierPath(ovalIn: self.bounds)}
open override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
return touchPath.contains(point)
}
}
class ViewController: UIViewController {
#IBOutlet weak var label: UILabel!
#IBOutlet weak var startButton: UIButton!
#IBOutlet weak var stopButton: UIButton!
#IBOutlet weak var resetButton: UIButton!
var timeRemaining: Int = 10
var timer: Timer?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
//// Moved to an extension in order to
//// remove the clickable areas outside
//// of the circle
//startButton.layer.cornerRadius = 50.0
//stopButton.layer.cornerRadius = 50.0
}
#IBAction func start(_ sender: Any) {
timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(step), userInfo: nil, repeats: true)
}
#IBAction func stop(_ sender: Any) {
timer?.invalidate()
}
#IBAction func reset(_ sender: Any) {
timer?.invalidate()
timeRemaining = 10
label.text = "\(timeRemaining)"
}
#objc func step() {
if timeRemaining > 0 {
timeRemaining -= 1
} else {
timer?.invalidate()
}
label.text = "\(timeRemaining)"
}
}

Answer 1

For your case, extension is not the right option as the methods invoked from extension will apply to the type itself (all UIButton objects in this case).
One option for you is to make a subclass of UIButton instead of extension. Something like this:
class RoundedButton: UIButton {
open override func draw(_ rect: CGRect) {
self.layer.cornerRadius = 50.0
self.layer.masksToBounds = true
}
private var touchPath: UIBezierPath {return UIBezierPath(ovalIn: self.bounds)}
open override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
return touchPath.contains(point)
}
}
And hence you can select the buttons that should inherit the custom layout from the class above:
#IBOutlet weak var startButton: RoundedButton!
#IBOutlet weak var stopButton: RoundedButton!
#IBOutlet weak var resetButton: UIButton! // Will not get the style applied for startButton and stopButton