blog

0.lying-function.swift

func submitButtonPressed {
  showLoadingWheel()
  defer { hideLoadingWheel() }
  guard validateInput() else {
    hideLoadingWheel()
    showErrorAlert()
    return
  }
}

func validateInput -> Bool {
  guard let username = self.usernameField.text else { return false }
  let trimmedUsername = username.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines)
  guard trimmedUsername.length > 0 else { return false }
  let payload = ["username": trimmedUsername];
  webService.sendPOSTRequest(withPayload: payload)
  return true
}