I can't figure out the proper way to call a function (with an IBOutlet variable inside of it) from another class. Basically after I click on the "Show Window" button, a custom alert view (container view) appears,
but when I click on the "Close" button, I want the alert view to disappear. Could someone please help me? Thanks, here's the code:
ViewController (main view):
import UIKit
class ViewController: UIViewController {
@IBOutlet var background: UIView!
@IBOutlet var windowView: UIView!
@IBAction func showWindowBtn(_ sender: Any) {
view.addSubview(windowView)
windowView.center = view.center
openAnimation()
}
// viewDidLoad
override func viewDidLoad() {
super.viewDidLoad()
background.alpha = 0
windowView.alpha = 0
}
// ---------- functions ----------- \\
// openAnimation
func openAnimation () {
UIView.animate(withDuration: 0.3) {
self.background.alpha = 1
self.windowView.alpha = 1
}
}
// closeAnimation
func closeAnimation () {
UIView.animate(withDuration: 0.3) {
self.background.alpha = 0
self.windowView.alpha = 0
}
}
}
ViewController 2 (alert view):
import UIKit
class ViewController2: UIViewController {
@IBAction func closeBtn(_ sender: Any) {
/*
In here, I want to access ViewController's 'closeAnimation()' function
without getting the 'unexpectedly found nil while unwraping an optional value'
error
*/
}
override func viewDidLoad() {
super.viewDidLoad()
// some code
}
}
