How do I make a button add one view at a time? - swift

Question

I'm practicing creating an app that has 3 views. Each view has a button to hide itself. Now, I added a button outside the views to re-add them after I hide them, but, when i remove the views and I press it, it shows me all of the three views. I want it to add one view at a time (without removing the other views). What can I do?
This is my code, I was even thinking about adding multiple add buttons but it wouldn't be clear.
#IBAction func addViewButton(_ sender: Any) {
view1.isHidden = false
view2.isHidden = false
view3.isHidden = false
}

Answer 1

Declare a variable like currentVisibleViews in your ViewController, and lets say at first there is only first one is visible so we start off the number as 1, and also add your views to an array to control easier:
var currentVisibleViews = 1
var viewArray = [UIView]()
In viewDidLoad, add your views to viewArray:
view1.isHidden = false
view2.isHidden = true
view3.isHidden = true
viewArray.append(view1)
viewArray.append(view2)
viewArray.append(view3)
Then in your button:
#IBAction func addViewButton(_ sender: Any) {
if currentVisibleViews > 2 {
viewArray.forEach { (view) in
view.isHidden = true
}
currentVisibleViews = 0
} else {
viewArray[currentVisibleViews].isHidden = false
currentVisibleViews += 1
}
}
Code above works as this:
First all views are visible
First tap will hide all views
Then each tap will make a view visible
Go to step 2 (once all views are visible)
By this way, you can only have one function to control all your views, it doesnt have to be IBAction anymore, it can be just a method of your ViewController