Why button appears only on the second attempt? - ios

Question

I'm trying to add a function that will show the close button in my custom alert view.
When I call it for the first time, only an empty area appears that does not contain a button (no color, no text and no pressing). When you call again - everything works as it should.
It does not depend on the parameter animated, in both cases it works the same.
My dialogView is a my custom UIView. I don't use UIAlertController
What could be the problem?
initial view after the first attempt second attempt
GIF call func by click
func showCloseButton(text: String, animated: Bool){
let dialogViewHeight = self.dialogView.frame.height + 50 + 1
let button = UIButton(type: .roundedRect)
button.backgroundColor = .red
button.frame.origin = CGPoint(x: 0, y: dialogViewHeight)
button.frame.size = CGSize(width: self.dialogView.frame.width, height: 50)
button.setTitle(text, for: .normal)
button.addTarget(self, action: #selector(closeTapped), for: .touchUpInside)
let separatorLineView = UIView()
separatorLineView.frame.origin = CGPoint(x: 0, y: self.dialogView.frame.height)
separatorLineView.frame.size = CGSize(width: dialogView.frame.width, height: 1)
separatorLineView.backgroundColor = UIColor.groupTableViewBackground
dialogView.addSubview(separatorLineView)
if animated {
animateAdjustDialogView(height: dialogViewHeight){
Logger.Log("completion did")
self.dialogView.addSubview(button)
}
} else {
Logger.Log("button.frame.origin = \(button.frame.origin)")
Logger.Log("button.frame.size = \(button.frame.size)")
Logger.Log("button.title = \(button.titleLabel)")
self.dialogView.frame.size = CGSize(width: self.dialogView.frame.width, height: dialogViewHeight)
self.dialogView.addSubview(button)
}
}
private func animateAdjustDialogView(height: CGFloat, completion: (()->Void)?){
UIView.animate(withDuration: 1.0, animations: {
self.dialogView.frame.size = CGSize(width: self.dialogView.frame.width, height: height)
self.layoutIfNeeded()
}) { (finished) in
Logger.Log("finished = \(finished)")
if finished {
Logger.Log("completion run")
completion?()
}
}
}

Answer 1

Button frame is causing the issue -
button.frame.origin = CGPoint(x: 0, y: dialogViewHeight)
Where
let dialogViewHeight = self.dialogView.frame.height + 50 + 1
That means, button goes beyond dialogView frame.
So replace
button.frame.origin = CGPoint(x: 0, y: dialogViewHeight)
With
button.frame.origin = CGPoint(x: 0, y: dialogViewHeight - 50) // Height of the Button.
Let me know if you are still having any issue.