Is there any easier way to view UIImageView programmatically? - swift

Question

I have 8 buttons and I want to display a picture every time I press the buttons.
What I wonder is, do I need to have 8 functions to display these images?
Or is there any easier ways?
Here is how I've done it, it works as it should, but I do not want to repeat the same things over and over again?
var imageView1:UIImageView!
var imageView2:UIImageView!
var imageView3:UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
showImage1()
showImage2()
showImage3()
tapGestureRecognizerFunc()
}
#objc func button1Tap() {
if self.imageView1.isHidden {
self.imageView1.isHidden = false
}else{
self.imageView1.isHidden = true
}
}
#objc func button2Tap() {
if self.imageView2.isHidden {
self.imageView2.isHidden = false
}else{
self.imageView2.isHidden = true
}
}
#objc func button3Tap() {
if self.imageView3.isHidden {
self.imageView3.isHidden = false
}else{
self.imageView3.isHidden = true
}
}
func showImage1() {
imageView1 = UIImageView(frame: CGRect(x: 271, y: 8, width: 29, height: 29))
imageView1.image = UIImage(named: "Done.png")
imageView1.contentMode = .scaleAspectFit
View1.addSubview(imageView1)
imageView1.isHidden = true
}
func showImage2() {
imageView2 = UIImageView(frame: CGRect(x: 271, y: 8, width: 29, height: 29))
imageView2.image = UIImage(named: "Done.png")
imageView2.contentMode = .scaleAspectFit
View2.addSubview(imageView2)
imageView2.isHidden = true
}
func showImage3() {
imageView2 = UIImageView(frame: CGRect(x: 271, y: 8, width: 29, height: 29))
imageView2.image = UIImage(named: "Done.png")
imageView2.contentMode = .scaleAspectFit
View3.addSubview(imageView2)
imageView2.isHidden = true
}
func tapGestureRecognizerFunc () {
let exercise1Tap = UITapGestureRecognizer(target: self, action: #selector(button1Tap))
exercise1Tap.numberOfTapsRequired = 2
View1.addGestureRecognizer(exercise1Tap)
let exercise2Tap = UITapGestureRecognizer(target: self, action: #selector(button2Tap))
exercise2Tap.numberOfTapsRequired = 2
View2.addGestureRecognizer(exercise2Tap)
let exercise3Tap = UITapGestureRecognizer(target: self, action: #selector(button3Tap))
exercise3Tap.numberOfTapsRequired = 2
View3.addGestureRecognizer(exercise3Tap)
}
yes i'm newbie

Answer 1

Since I don't know, where and how you create the Buttons it is difficult to answer.
The following is just a tip.
You should use an array of UIImageView
Your callback should use the Form buttonAction(sender : UIButton)
You could use a tag for the button to get the number of the corresponding button
For example:
class ViewController: UIViewController {
var imageviews : [UIImageView] = []
override func viewDidLoad() {
super.viewDidLoad()
for i in 1...8 {
let imageview = UIImageView()
view.addSubview(imageview)
imageview.tag = i
imageviews.append(imageview)
let button = UIButton(frame: CGRect(x: 0, y: CGFloat(i)*50.0, width: 100, height: 30))
view.addSubview(button)
button.setTitle("Button \(i)", for: .normal)
button.setTitleColor(.black, for: .normal)
button.tag = i
button.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
}
}
#objc func buttonAction(sender : UIButton) {
let index = sender.tag
print("Button \(index) pressed")
imageviews[index].isHidden = !imageviews[index].isHidden
}
}