How to add a button on the Google maps in iOS?

Question

I am new to iOS Programming and I have downloaded the google maps sdk for iOS and followed the instruction on their website ( as shown in this link https://developers.google.com

Answer 1

 let mapButton:UIButton = UIButton(frame: CGRect(x:self.view.bounds.width-50, y: 20, width: 40, height: 40)) //Swfit 5
    mapButton.backgroundColor = UIColor.clear
    mapButton.setImage(UIImage(named: "list"), for: UIControl.State.normal)
    mapButton.setImage(UIImage(named: "map"), for: UIControl.State.selected)
    mapButton.addTarget(self, action:#selector(self.mapListClicked), for: .touchUpInside)
    self.view.addSubview(mapButton)