How to remove a button when it is clicked? - ios

Question

I'm very new to swift. I've created multiple textfield and button by using subview. The output of my ViewController is below:-
Now I need to remove "-" button and it's corresponding textfield when it is clicked.
But I'm not able to detect which button is being clicked.
This is my code:
var y: CGFloat = 190
var by: CGFloat = 192
#IBAction func addRow(sender: AnyObject) {
y += 30
by += 30
let textFiled = UITextField(frame:CGRectMake(50.0, y, 100.0, 20.0))
textFiled.borderStyle = UITextBorderStyle.Line
let dunamicButton = UIButton(frame:CGRectMake(155.0, by, 15.0, 15.0))
dunamicButton.backgroundColor = UIColor.clearColor()
dunamicButton.layer.cornerRadius = 5
dunamicButton.layer.borderWidth = 1
dunamicButton.layer.borderColor = UIColor.blackColor().CGColor
dunamicButton.backgroundColor = .grayColor()
dunamicButton.setTitle("-", forState: .Normal)
dunamicButton.addTarget(self, action: #selector(removeRow), forControlEvents: .TouchUpInside)
self.view.addSubview(textFiled)
self.view.addSubview(dunamicButton)
}
func removeRow(sender: UIButton!) {
print("Button tapped")
self.view.removeFromSuperview()
}
any help would be appreciated...

Answer 1

eMKA was right! Try this:
import UIKit
class ViewController: UIViewController {
var y:CGFloat = 100
var textFields = [UIButton : UITextField]()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
#IBAction func onAddMoreButtonPressed(sender: AnyObject) {
let newButton = UIButton(frame: CGRect(x: 50, y: y, width: 150, height: 20))
newButton.setTitle("New button", forState: .Normal)
newButton.backgroundColor = UIColor.blueColor()
newButton.addTarget(self, action: #selector(ViewController.onNewButtonPressed(_:)), forControlEvents: .TouchUpInside)
self.view.addSubview(newButton)
let newTextField = UITextField(frame: CGRect(x: 200, y: y, width: 150, height: 20))
newTextField.text = "New text field"
self.view.addSubview(newTextField)
textFields[newButton] = newTextField
y += 20
if y > self.view.frame.height {
y = 100
}
}
func onNewButtonPressed(sender: UIButton) {
textFields[sender]?.removeFromSuperview()
sender.removeFromSuperview()
}
}

Answer 2

You can override the method touchesBegan in any view controller. Assuming that you are storing an array of your buttons somewhere
let buttons : [UIButton] = []
you can do the following:
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
super.touchesBegan(touches, withEvent: event)
guard let touch: UITouch = touches.first else {
return
}
for button in buttons {
if touch.view == button {
print("This is the button you tapped")
button.removeFromSuperview()
}
}
}