How do I make two UIButtons perform like radio buttons in Swift?

Question

I have two UIButtons that I want to use to set an A/B value to a variable before I save data to a database. I want a button to become selected when tapped, and deselected when the other button is tapped, and vice versa. What is a good solution for accomplishing this programmatically or in Interface Builder?

Answer 1

In order to set an "A/B value" as you mention, the easiest option would be to use a UISwitch or -in the general case of possibly more than 2 options- a UISegmentedControl (as @rmaddy suggested in the question's comments) .

These controls have built-in the "choose just one out of many" functionality that you are looking for.

The drawbacks of the switch are:

• It has to be either on or off (does not support a selection state of "neither A nor B")
• You can't have separate title labels for each state.

---

If you still want two separate UIButton instances, you can:

• Have references to both buttons in your view controller (@IBOutlets wired using Interface Builder), e.g.:

  @IBOutlet weak var leftButton: UIButton!
  @IBOutlet weak var rightButton: UIButton!
  

• Implement the action method for both buttons in such a way that it sets the selected state of the tapped button, and resets the other one. For example:

  @IBAction func buttonAction(sender: UIButton) {
      if sender == leftButton {
          leftButton.isSelected = true
          rightButton.isSelected = false
      } else if sender == rightButton{
          leftButton.isSelected = false
          rightButton.isSelected = true
      }
  }
  

This is a quick-and-dirty solution for just two buttons. If you want a generic radio group of n-buttons, there are open source solutions on GitHub, etc...

Answer 2

Try this.

First create both button separate @IBOutlet.

@IBOutlet weak var btnYes: UIButton!
@IBOutlet weak var btnNo: UIButton!

Set Both Button Tag Like this and you also set tag using storyboard.

override func viewDidLoad() {
      super.viewDidLoad()

    btnYes.tag = 1
    btnNo.tag = 2
}

Implement Common @IBAction method for both buttons

@IBAction func btnYesNoTapped(_ sender: UIButton) {
        if sender.tag == 1 {
            self.IsBtnSelected(isSelect: true, with: self.btnYes)
        }else {
            self.IsBtnSelected(isSelect: true, with: self.btnNo)
        }

}

Create Custome Method

func IsBtnSelected(isSelect:Bool,with sender:UIButton){
        self.btnYes.isSelected = false
        self.btnNo.isSelected = false
        sender.isSelected = isSelect
}