checkbox.swift

//UIButton
@IBOutlet weak var roofBtn: UIButton!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        checkBoxBtnInit()
    }
    
// check button init    
func checkBoxBtnInit(){
        let closeImage = UIImage(named:"ic_radio_button_checked")?.imageWithRenderingMode(
            UIImageRenderingMode.AlwaysTemplate)
        roofBtn.tintColor = UIColor(red:0.13, green:0.59, blue:0.95, alpha:1.0)  //set tint color
        roofBtn.setImage(closeImage, forState:UIControlState.Normal)  //set image to UIButton
    }