parse.com中的登錄參數無效

Question

當前正在以parse.com作爲後端的登錄系統上工作。我輸入了我認爲完全有效的代碼，但仍然收到無效的登錄參數。

我不知道是怎麼回事......

import UIKit 
import Parse 
class ViewController: UIViewController { 
    @IBOutlet weak var userEmailAddressTextField:UITextField! 

    @IBOutlet weak var userPasswordTextField: UITextField! 

    override func viewDidLoad() { 
     super.viewDidLoad() 
     // Do any additional setup after loading the view, typically from a nib. 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

    @IBAction func signInButtonTapped(sender: AnyObject) { 
    let userEmail = userEmailAddressTextField.text 
    let userPassword = userPasswordTextField.text 
     if(userEmail.isEmpty || userPassword.isEmpty) { 
     return 
     } 

     PFUser.logInWithUsernameInBackground(userEmail, password: userPassword) { 
      (user:PFUser?, error:NSError?) -> Void in 

      var userMessage = "Welcome!" 

      if(user != nil) 
      { 




      } else { 
       userMessage = error!.localizedDescription 


      } 
      var myAlert = UIAlertController(title: "Alert", message: userMessage, preferredStyle: UIAlertControllerStyle.Alert) 
      let okAction = UIAlertAction(title: "ok", style: UIAlertActionStyle.Default, handler: nil) 
      myAlert.addAction(okAction) 
      self.presentViewController(myAlert, animated: true, completion: nil) 
     } 
    } 

Answer 1

@IBAction func signInButtonTapped(sender: AnyObject) { 
let userEmail = userEmailAddressTextField.text 
let userPassword = userPasswordTextField.text 
if userEmail.isEmpty || userPassword.isEmpty { 
    println("You forgot to fill in some fields, please try again.") 
} 

PFUser.logInWithUsernameInBackground(userEmail, password: userPassword) { 
    (user: PFUser?, error: NSError?) -> Void in 
    if user != nil { 
     // Do stuff after successful login. 
    } else { 
     var myAlert = UIAlertController(title: "Alert", message: userMessage, preferredStyle: UIAlertControllerStyle.Alert) 
     let okAction = UIAlertAction(title: "ok", style: UIAlertActionStyle.Default, handler: nil) 
     myAlert.addAction(okAction) 
     self.presentViewController(myAlert, animated: true, completion: nil) 

    } 
} 

我相信這個代碼應該是解決你的問題。如果這不起作用，請確保您的客戶端密鑰和應用程序ID在AppDelegate.swift中正確輸入。