如何在Swift中以編程方式更改Facebook按鈕的文本？

Question

我有一個從他們的SDK的Facebook登錄按鈕，並希望改變文本。我試過這段代碼：

facebookButton.setTitle("my text here", forState: .Normal) 

但它不起作用。有沒有辦法做到這一點？

這是Facebook登錄按鈕的代碼是什麼樣子：

//MARK: Facebook Login 

    func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!) { 
    if error == nil { 

     facebookAPILogin(FBSDKAccessToken.currentAccessToken().tokenString, completionHandler: { error in 

     if error == nil { 

      self.performSegueWithIdentifier("loginToHomeSegue", sender: self) 

     } else { 



      self.showAlertWithTitle("Sorry".localized(), message: "There was a problem connecting with Facebook".localized()) 

      print(error) 

     } 
     } 
    ) 

    } else { 

     showAlertWithTitle("Sorry".localized(), message: "There was a problem connecting with Facebook".localized()) 

     print(error.localizedDescription) 

    } 
    } 


    //Facebook Logout 

    func loginButtonDidLogOut(loginButton: FBSDKLoginButton!) { 
    print("User logged out") 

    } 

Answer 1

您可以嘗試通過在FBLoginViews去改變按鈕上的文字 - How to customize FBLoginVIew?

然而，這將是，如果你很容易只用您自己的自定義按鈕替換按鈕。

此鏈接可以更好地幫助您： https://developers.facebook.com/docs/facebook-login/ios#custom-login-button

Answer 2

我才發現，逛很多錯誤的答案後，它是：

let buttonText = NSAttributedString(string: "your text here") 
facebookButton.setAttributedTitle(buttonText, for: .normal) 

Answer 3

假設你在一些VC和工作的loginButton屬性是FBSDKLoginButton

- (void)viewDidAppear:(BOOL)animated 
{ 
    [super viewDidAppear:animated]; 

    [self.loginButton setAttributedTitle:[[NSAttributedString alloc] initWithString:@"test"] 
           forState:UIControlStateNormal]; 

}