Swift remove subview from another class - swift

Question

I have my ViewController 'chatPage' in which I am presenting a UIView using a xib file called 'chatOverlay'. I have placed a button inside the xib which when pressed I would like to remove the subview from the chatPage ViewController.
I am not sure how to go about this as the button is in a different class to the subview and has no reference to the ViewController I wish to remove the sub view from.
I am aware I could use a notification observer to notify the viewController but is there an alternative way?
How would I go about removing the subview from within the chatOverlay class when the button is tapped?
chatOverlay:
import Foundation
class chatOverlay: UIView {
#IBAction func closeOverlay(_ sender: UIButton) {
print("CLOSE OVERLAY")
}
}
chatPage:
class chatPage: UIViewController {
override func viewDidLoad(){
view.addSubview(overlayAdd().show(height: view.frame.size.height, width: view.frame.size.width, x: view.frame.origin.x, y: view.frame.origin.y, tag: 101))
}
}
overlayAdd:
import Foundation
import UIKit
class overlayAdd {
func show(height: CGFloat, width: CGFloat, x: CGFloat, y: CGFloat, tag: Int) -> UIView{
let chatOverlay = xibLoad().chatOverlay()
chatOverlay.frame.size.height = height
chatOverlay.frame.size.width = width
chatOverlay.frame.origin.x = x
chatOverlay.frame.origin.y = y
chatOverlay.tag = tag
let view = chatOverlay
return view
}
func remove(tag: Int){ }
}

Answer 1

You can use self.removeFromSuperview()
// Completely agree with comments, change to ChatOverlay
class chatOverlay: UIView {
#IBAction func closeOverlay(_ sender: UIButton) {
self.removeFromSuperview()
}
}
If you want it to fade away
// Again, completely agree with comments, change to ChatOverlay
class chatOverlay: UIView {
#IBAction func closeOverlay(_ sender: UIButton) {
UIView.animate(withDuration: 0.5, animations: {
self.alpha = 0.0
}) { (_) in
self.removeFromSuperview()
}
}
}
I am really curious how you are using a UIView inside chatOverlay when you appear to only be importing Foundation? Also, cannot figure out why in overlayAdd you are importing both Foundation and UIKit? UIKit itself imports Foundation. The biggest confussion to me is why do you have a class overlayAdd at all? Shouldn't the show function be more of a create function (you are not showing it till you add it as a subview) and just be a part of chatOverlay? Something like:
// Completely agree with comments, change to ChatOverlay
class chatOverlay: UIView {
#IBAction func closeOverlay(_ sender: UIButton) {
UIView.animate(withDuration: 0.5, animations: {
self.alpha = 0.0
}) { (_) in
self.removeFromSuperview()
}
}
static func create(withFrame: frame, tag: Int) -> UIView{
let chatOverlay = xibLoad().chatOverlay()
chatOverlay.frame = frame
chatOverlay.tag = tag
/*
What in the world are you trying to do here???
let view = chatOverlay
return view
get rid of these two completely useless lines!
just return chatOverlay like below...
*/
return chatOverlay
}
}
and then in chatPage:
// Completely agree with comments, change to ChatPage
class chatPage: UIViewController {
override func viewDidLoad(){
view.addSubview(chatOverlay.create(withFrame: view.frame, tag: 101))
}
}