Using ScrollView Programmatically in Swift 3

Question

I have searched other questions and seem to still have some trouble creating my scrollView programmatically with autolayout in swift 3. I am able to get my scrollview to sho

Answer 1

Set scrollview images to the wallpaper:

@IBOutlet var scroll_view_img: UIScrollView!

var itemPhotoList = NSMutableArray()

var button = NSMutableArray()    

@IBOutlet var imageview_big: UIImageView!

override func viewDidLoad() {

    super.viewDidLoad()
    itemPhotoList = ["grief-and-loss copy.jpg","aaa.jpg","image_4.jpeg"]        

    // button = ["btn1","btn2"]

    let width:CGFloat = 100
    let height:CGFloat = 100
    var xposition:CGFloat = 10
    var scroll_contont:CGFloat = 0

    for i in 0 ..< itemPhotoList.count
    {
        var button_img = UIButton()
        button_img = UIButton(frame: CGRect(x: xposition, y: 50, width: width, height: height))
        let img = UIImage(named:itemPhotoList[i] as! String)
        button_img.setImage(img, for: .normal)
        scroll_view_img.addSubview(button_img)
        button_img.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
        button_img.tag = i
        view.addSubview(scroll_view_img)
        xposition += width+10
        scroll_contont += width
        scroll_view_img.contentSize = CGSize(width: scroll_contont, height: height)
    }
}

func buttonAction(sender: UIButton!)
{
    switch sender.tag {
    case 0:
        imageview_big.image = UIImage(named: "grief-and-loss copy.jpg")
    case 1:
        imageview_big.image = UIImage(named: "aaa.jpg")
    case 2:
        imageview_big.image = UIImage(named: "image_4.jpeg")
    default:
        break
    }
}