Facebook使用Firebase和LoginButton登录IOS

Question

我正在尝试使用Firebase和Facebook Login button执行FacebookLogin ，但我一直这样做

错误：Facebook登录被取消。

2016-04-01 19：08：15.721 biblos [778：408049]警告：尝试在窗口层次结构中显示其视图！

用户已退出...

Facebook登录被取消。

2016-04-01 19：08：53.675 biblos [778：408049]警告：尝试在窗口层次结构中显示其视图！

我的ViewController代码如下：

import UIKit
import Firebase
import FBSDKCoreKit
import FBSDKLoginKit

class ViewController: UIViewController, FBSDKLoginButtonDelegate {

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


    var loginButton = FBSDKLoginButton()
    loginButton.readPermissions = ["public_profile", "email", "user_friends"]
    loginButton.center = self.view.center
    loginButton.delegate = self
    self.view.addSubview(loginButton)

}

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




// MARK: - Facebook Login

func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!)
{
    let ref = Firebase(url: "https://biblos-thebookapp.firebaseio.com")
    let facebookLogin = FBSDKLoginManager()

    facebookLogin.logInWithReadPermissions(["email"], handler: {
        (facebookResult, facebookError) -> Void in

        if facebookError != nil {
            print("Facebook login failed. Error \(facebookError)")
        } else if facebookResult.isCancelled {
            print("Facebook login was cancelled.")
        } else {
            let accessToken = FBSDKAccessToken.currentAccessToken().tokenString

            ref.authWithOAuthProvider("facebook", token: accessToken,
                withCompletionBlock: { error, authData in

                    if error != nil {
                        print("Login failed. \(error)")
                    } else {
                        print("Logged in! \(authData)")
                    }
            })
        }
    })

}

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


}

Answer 1

不建议使用此方法。 尝试使用logInWithReadPermissions:fromViewController:handler:并传递UIViewController或nil（将使用最上面的）。

https://developers.facebook.com/docs/reference/ios/current/class/FBSDKLoginManager/