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Using an Undeclared UIViewController Type

I did not change anything serious about this fast file, but for some reason, when I went to start my application, I got a new error indicating "Use of an undeclared type of UIViewController" in the first line of my quick file. I tried to clear and check the goals, but I can not understand the problem.

I get errors in each line below, except for import statements

import Foundation import FirebaseAuth import FirebaseDatabase public class User: UIViewController { @IBOutlet weak var _Fname: UITextField! @IBOutlet weak var _Lname: UITextField! @IBOutlet weak var _Email: UITextField! @IBOutlet weak var _Password1: UITextField! @IBOutlet weak var _Password2: UITextField!

Please let me know if you have thoughts on why this might happen. Thanks in advance!

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1 answer

You probably forgot import UIKit on top of your file. Without UIKit import UIKit your object does not know what UIViewController .

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Source: https://habr.com/ru/post/1260542/

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