makeAlert Function Returns Always False - swift

Question

The function below always returns false. I tried to put return inside of the completion it did not accept either.
Can you please help me?
// MARK: - make Alert for user Input
func makeAlert(message: String, defaultButtonText: String, cancelButtonText: String) - > Bool {
var answer = Bool()
let alert = UIAlertController(title: "Warning", message: message, preferredStyle: .alert)
let actionYes = UIAlertAction(title: defaultButtonText, style: .default) {
(action) in
answer = true
}
let actionNo = UIAlertAction(title: cancelButtonText, style: .default) {
(action) in
answer = false
}
alert.addAction(actionNo)
alert.addAction(actionYes)
self.present(alert, animated: true, completion: {
print(answer)
})
return answer
}

Answer 1

You have to use completion like this.
func makeAlert(message: String,defaultButtonText: String, cancelButtonText: String, completion: #escaping ((Bool) -> Void)) {
let alert = UIAlertController(title: "Warning", message: message, preferredStyle: .alert)
let actionYes = UIAlertAction(title: defaultButtonText, style: .default) { (action) in
completion(true)
}
let actionNo = UIAlertAction(title: cancelButtonText, style: .default) { (action) in
completion(false)
}
alert.addAction(actionNo)
alert.addAction(actionYes)
self.present(alert, animated: true, completion: {
})
}
Usage :
makeAlert(message: "Test", defaultButtonText: "Test", cancelButtonText: "Test") { (action) in
if action {
// Do code for true part
} else {
// Do code for false part
}
}
EDIT
As per the commnet. How to use in FSCalendar
func calendar(_ calendar: FSCalendar, shouldSelect date: Date, at monthPosition: FSCalendarMonthPosition) -> Bool {
makeAlert(message: "Test", defaultButtonText: "Yeah", cancelButtonText: "No") { (action) in
if action {
calendar.select(date)
}
}
return false
}