Radio Button Group Swift 3 Xcode 8 - ios

Question

I have searched various sources and could not find a clear and simple solution for creating the equivalent of a radio button group in Swift 3 with Xcode 8.3 for an iOS application.
For example if I have 3 buttons in one group and only one should be selected at a time. Currently I am implementing this by changing the state of 2 buttons in the group to not selected when the other one is selected and vice versa.
#IBAction func buttonA(_ sender: Any) {
buttonB.isChecked = false
buttonC.isChecked = false
}
#IBAction func buttonB(_ sender: Any) {
buttonA.isChecked = false
buttonC.isChecked = false
}
#IBAction func buttonC(_ sender: Any) {
buttonA.isChecked = false
buttonB.isChecked = false
}
However I would expect a more efficient way to do this.
Any help on a more efficient solution will be appreciated.

Answer 1

You can connect all your button's IBAction to one single method.
#IBAction func buttonClick(_ sender: UISwitch) { // you're using UISwitch I believe?
}
You should add all the buttons into an array:
// at class level
var buttons: [UISwitch]!
// in viewDidLoad
buttons = [buttonA, buttonB, buttonC]
Then, write the buttonClick method like this:
buttons.forEach { $0.isChecked = false } // uncheck everything
sender.isChecked = true // check the button that is clicked on
Alternatives:
Try using a UITableView. Each row contains one option. When a row is selected, change that row's accessoryType to .checkMark and every other row's to .none.
If you are too lazy, try searching on cocoapods.org and see what other people have made.

Answer 2

Just make a single selector for all three button's touchUpInside event, and set radio_off image for normal state and radio_on image for selected state in your IB, then only you have to connect btnClicked method to all button's touchUpInside event
class ViewController: UIViewController {
#IBOutlet weak var btnFirst:UIButton!
#IBOutlet weak var btnSecond:UIButton!
#IBOutlet weak var btnThird:UIButton!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func btnClicked(sender:UIButton){
let buttonArray = [btnFirst,btnSecond,btnThird]
buttonArray.forEach{
$0?.isSelected = false
}
sender.isSelected = true
}

Answer 3

Depending on your UI, you could take multiple approaches.
UITableView - Use a UITableView with a checkmark decorator. If your layout for these radio buttons is fairly traditional, this is the correct paradigm. If the layout is a grid instead of a list, you could use UICollectionView.
You can use the func table(_ table: WKInterfaceTable, didSelectRowAt rowIndex: Int) in UITableViewDelegate to capture the selection. You can call indexPathForSelectedRow on the tableView when you want to commit the change to determine which cell was selected.
Apple's tutorial on UITableView can be found at:
https://developer.apple.com/library/content/referencelibrary/GettingStarted/DevelopiOSAppsSwift/CreateATableView.html
Manage a group of UIButtons - You could store an array of references to UIButton objects that are part of your radio button group.
protocol RadioButtonDelegate: class {
func didTapButton(_ button: UIButton)
}
class RadioButtonGroup {
private var buttons: [UIButton] = []
weak var delegate: RadioButtonDelegate?
var selectedButton: UIButton? { return buttons.filter { $0.isSelected }.first }
func addButton(_ button: UIButton) {
buttons.append(button)
}
#objc private func didTapButton(_ button: UIButton) {
button.isSelected = true
deselectButtonsOtherThan(button)
delegate?.didTapButton(button)
}
private func deselectButtonsOtherThan(_ selectedButton: UIButton) {
for button in buttons where button != selectedButton {
button.isSelected = false
}
}
}
class MyView: UIView {
private var radioButtonGroup = RadioButtonGroup()
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
let button1 = UIButton(type: .custom)
button1.setTitle("Eeeny", for: .normal)
let button2 = UIButton(type: .custom)
button2.setTitle("Meeny", for: .normal)
let button3 = UIButton(type: .custom)
button3.setTitle("Miny", for: .normal)
self.radioButtonGroup.addButton(button1)
self.radioButtonGroup.addButton(button2)
self.radioButtonGroup.addButton(button3)
addSubview(button1)
addSubview(button2)
addSubview(button3)
}
}

Answer 4

import UIKit
class ViewController: UIViewController {
#IBOutlet weak var maleLB: UIButton!
#IBOutlet weak var femaleLB: UIButton!
#IBOutlet weak var otherLB: UIButton!
var gender = "Male"
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
if gender == "Male"{
femaleLB.isSelected = true
}
}
#IBAction func maleBtn(_ sender: UIButton) {
if sender.isSelected {
sender.isSelected = false
femaleLB.isSelected = false
otherLB.isSelected = false
}
else{
sender.isSelected = true
femaleLB.isSelected = false
otherLB.isSelected = false
}
}
#IBAction func femaleBtn(_ sender: UIButton) {
if sender.isSelected {
sender.isSelected = false
maleLB.isSelected = false
otherLB.isSelected = false
}
else{
sender.isSelected = true
maleLB.isSelected = false
otherLB.isSelected = false
}
}
#IBAction func otherBtn(_ sender: UIButton) {
if sender.isSelected {
sender.isSelected = false
maleLB.isSelected = false
femaleLB.isSelected = false
}
else{
sender.isSelected = true
maleLB.isSelected = false
femaleLB.isSelected = false
}
}
}