Passing data back from embedded view controller

Question

I have a UIViewController which embedded inside another UIViewController. In this child view controller, there are two UITextFields which lets the user to enter some data.

How can I pass that data entered in that embedded view controller back to the parent view controller?

I tried to get a reference to the text fields in the child view controller using this method but I get an error.

let textfield: UITextField = self.childViewControllers.last?.usernameTextField! as UITextField

This usernameTextField is one of the UITextFields inside that embedded UIViewController. I get the following error,

'AnyObject' does not have a member named 'usernameTextField'

Is this the best way to do this or are there any other routes I could take to accomplish this?

Thank you.

Answer 1

You need to typecast before using it. Check with:

let myObj : MyClass        = self.childViewControllers.last as ? MyClass;
let textfield: UITextField = myObj?.usernameTextField! as UITextField;