phone number verification without Reactive #6

phoneNumberVerify6.swift

class PhoneVerifyViewController: UIViewController {
    enum PhoneNumberVerifyStep {
        case inputPhoneNumber, inputVerifyNumber, verifying, succeed, failed
    }
    
    var verifyStep: PhoneNumberVerifyStep = .inputPhoneNumber
    
    @IBOutlet weak var phoneNumberTextField: UITextField!
    @IBOutlet weak var verifyNumberTextField: UITextField!
    @IBOutlet weak var requestVerifyNumberButton: UIButton!
    @IBOutlet weak var verifyButton: UIButton!
    @IBOutlet weak var statusLabel: UILabel!    
}