swift - 如何在 swift 中使用 ID 进行简单登录

Question

我想使用简单的验证在 Swift 中创建登录函数，但这行不通。我应该怎么办？当我在文本字段中输入 123456 然后单击登录按钮时，应该会转到下一页:

   @IBOutlet weak var IDtext: UITextField!

        var ID = self.IDtext.text 

            @IBAction func LogButton(_ sender: Any) {

            If( ID == "123456" )
        {
    dispatch_async(dispatch_get_main_queue(), 
{ 
() -> Void in let viewController:UIViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("Home") as! UIViewController
                        self.presentViewController(viewController, animated: true, completion: nil)
                    }

         }
        else 
        {
       var alert = UIAlertView(title: "Invalid", message: "Invalid ID", delegate: self, cancelButtonTitle: "OK")
            alert.show()
         }
            }

谢谢!

Answer 1

@IBAction func LogButton(_ sender: Any) {

  var ID = self.IDtext.text 
  if ID = "123456" {
    let pushVC:UIViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("Home") as! UIViewController
    self.navigationController?.pushViewController(pushVC, animated: true)
  } else {
     var alert = UIAlertView(title: "Invalid", message: "Invalid ID", delegate: self, cancelButtonTitle: "OK")
        alert.show()
  }
}

此外，如果您的家庭类(class)的名称是 Something say "HomeVC"，则按如下方式替换您的行:-

let pushVC:UIViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("Home") as! HomeVC