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Xcode102

Yet another piece of code…

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import UIKit

class ViewController: UIViewController {

var imgnumber = 1

@IBOutlet weak var mainview: UIImageView!
@IBOutlet weak var leftbutton: UIButton!
@IBOutlet weak var rightbutton: UIButton!

override func viewDidLoad() {
super.viewDidLoad()
}

@IBAction func leftbuttontap(_ sender: Any) {
if imgnumber <= 1 {
imgnumber = 4
}
else {
imgnumber -= 1
}
mainview.image = UIImage(named: "IMG_\(imgnumber)")
}

@IBAction func rightbuttontap(_ sender: Any) {
if imgnumber >= 4 {
imgnumber = 1
}
else {
imgnumber += 1
}
mainview.image = UIImage(named: "IMG_\(imgnumber)")
}
}

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