ios - 函数返回值(操作按钮)

Question

有谁知道如何从该函数返回一个值？我想返回 t ，该值是图像博士。我想返回这个 View Controller 中的值

@IBAction func firmaButton(_ sender: Any)  {
  let storyBoard1 : UIStoryboard = UIStoryboard(name: "NuevaCuenta", bundle: nil)
  let ViewControllerDos1 = storyBoard1.instantiateViewController(withIdentifier: "NCFirma") as! NCFirma
  ViewControllerDos1.modalPresentationStyle = .fullScreen

    ViewControllerDos1.clickedCallback = { t   in
        self.firmaButton.setImage(t, for: .normal)
        self.firmaButton.transform = self.firmaButton.transform.rotated(by: CGFloat(M_PI_2))
        self.firmaButton.frame =  CGRect(x: 13, y: 8, width: 294, height: 112)
        self.firmaButton.clipsToBounds = true
        RegTempNuevaCuenta.imgFirma = t
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        appDelegate.myOrientation = .portrait

    }

    self.navigationController?.pushViewController(ViewControllerDos1, animated: true)



}

Answer 1

@IBAction 函数是基于用户交互的系统函数。它们不返回任何内容，并且此类型函数的返回类型为 Void