How to create radio buttons and checkbox in swift (iOS)?

I am developing an app that allows to do survey. My layout is generated from XML based questions.

I need to create radio buttons (single choice) and checkboxes (multiple answers). I did not find anything useful for swift.

Does anyone have an idea?

Solution 1:

Checkbox

You can create your own CheckBox control extending UIButton with Swift:

import UIKit

class CheckBox: UIButton {
    // Images
    let checkedImage = UIImage(named: "ic_check_box")! as UIImage
    let uncheckedImage = UIImage(named: "ic_check_box_outline_blank")! as UIImage
    
    // Bool property
    var isChecked: Bool = false {
        didSet {
            if isChecked == true {
                self.setImage(checkedImage, for: UIControl.State.normal)
            } else {
                self.setImage(uncheckedImage, for: UIControl.State.normal)
            }
        }
    }
        
    override func awakeFromNib() {
        self.addTarget(self, action:#selector(buttonClicked(sender:)), for: UIControl.Event.touchUpInside)
        self.isChecked = false
    }
        
    @objc func buttonClicked(sender: UIButton) {
        if sender == self {
            isChecked = !isChecked
        }
    }
}

And then add it to your views with Interface Builder:

Radio Buttons

Radio Buttons can be solved in a similar way.

For example, the classic gender selection Woman - Man:

import UIKit

class RadioButton: UIButton {
    var alternateButton:Array<RadioButton>?
    
    override func awakeFromNib() {
        self.layer.cornerRadius = 5
        self.layer.borderWidth = 2.0
        self.layer.masksToBounds = true
    }
    
    func unselectAlternateButtons() {
        if alternateButton != nil {
            self.isSelected = true
            
            for aButton:RadioButton in alternateButton! {
                aButton.isSelected = false
            }
        } else {
            toggleButton()
        }
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        unselectAlternateButtons()
        super.touchesBegan(touches, with: event)
    }
    
    func toggleButton() {
        self.isSelected = !isSelected
    }
    
    override var isSelected: Bool {
        didSet {
            if isSelected {
                self.layer.borderColor = Color.turquoise.cgColor
            } else {
                self.layer.borderColor = Color.grey_99.cgColor
            }
        }
    }
}

You can init your radio buttons like this:

    override func awakeFromNib() {
        self.view.layoutIfNeeded()
        
        womanRadioButton.selected = true
        manRadioButton.selected = false
    }
    
    override func viewDidLoad() {
        womanRadioButton?.alternateButton = [manRadioButton!]
        manRadioButton?.alternateButton = [womanRadioButton!]
    }

Hope it helps.

Solution 2:

For Radio Buttons and CheckBoxes there is nothing that comes built in.

You can implement Checkboxes easily yourself. You can set an uncheckedImage for your button for UIControlStateNormal and a checkedImage for your UIControlStateSelected. Now on tap, the button will change its image and alternate between checked and unchecked image.

To use radio buttons, you have to keep an Array for all the buttons that you want to behave as radio buttons. Whenever a button is pressed, you need to uncheck all other buttons in the array.

For radio buttons you can use SSRadioButtonsController You can create a controller object and add buttons array to it like

var radioButtonController = SSRadioButtonsController()
radioButtonController.setButtonsArray([button1!,button2!,button3!])

The main principle is something like this here.

Solution 3:

Check out DLRadioButton. You can add and customize radio buttons directly from the Interface Builder. Also works with Swift perfectly.

Update: version 1.3.2 added square buttons, also improved performance.

Update: version 1.4.4 added multiple selection option, can be used as checkbox as well.

Update: version 1.4.7 added RTL language support.