What are the differences between prepare for segue and prepare for unwind? I have implemented both of these into Xcode project and they both come out with the same result. The code that I have implemented both of these functions are: (with prepare for unwind)
override func prepare(for unwind: UIStoryboardSegue, sender: Any?) {
let variableUnwind = ("StackOverFlow")
if unwind.identifier == "toFirstViewController" {
let hello = unwind.destination as! ViewController
hello.username = textField.text!
print(hello.username)
}
}
and:(with prepare for unwind)
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let variableUnwind = ("StackOverFlow")
if segue.identifier == "toFirstViewController" {
let hello = segue.destination as! ViewController
hello.username = textField.text!
print(hello.username)
}
}
They are both the same method. It doesn't matter whether the parameter name is unwind or segue, the selector is prepare(for:sender:).
If you try implementing both of them in the same class, you will get the error: invalid redeclaration of 'prepare(for:sender:)' with the second one.
I would suggest using prepare(for segue: UIStoryboardSegue, sender: Any?) because 1) That is what autocomplete suggests, and 2) All segues will go through there, not just unwinding ones. So it makes sense for the parameter to be called segue.