我使用以下代码在我的ios app中实现facebook和google plus登录.Facebook工作正常。点击谷歌加登录按钮我可以通过safari或谷歌+应用程序输入详细信息。问题是第一次成功登录。当我点击其他视图控制器上的注销或断开按钮时，我没有再次登录。第二次不调用finishedWithAuth委托。虽然我再次提出了输入细节的观点。
请帮帮我。我已经搜遍了所有但没有希望。
import UIKit
import FBSDKCoreKit
import FBSDKLoginKit
class ViewController: UIViewController,FBSDKLoginButtonDelegate,GPPSignInDelegate {
var signIn = GPPSignIn.sharedInstance()
// @IBOutlet weak var signInButton: GPPSignInButton!
override func viewDidLoad() {
super.viewDidLoad()
signIn.shouldFetchGooglePlusUser = true
signIn.shouldFetchGoogleUserEmail = true
signIn.shouldFetchGoogleUserID = true
signIn.scopes.append(kGTLAuthScopePlusLogin)
signIn.scopes.append("profile")
signIn.delegate = self
signIn.trySilentAuthentication()
if FBSDKAccessToken.currentAccessToken() == nil {
print("Not logged in")
} else {
print("Logged in")
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// if segue.identifier == "idSegueContent" {
// contentViewController = segue.destinationViewController as! ContentViewController
// }
}
func finishedWithAuth(auth: GTMOAuth2Authentication!, error: NSError!) {
print("\(error), \(auth)")
if ((error) != nil) {
print(error.localizedDescription)
} else {
print(signIn.userEmail)
print(signIn.userID)
self.performSegueWithIdentifier("loggedIn", sender: self)
}
}
func loginButton(fbLogin: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!) {
if error == nil {
print("logged")
self.performSegueWithIdentifier("loggedIn", sender: self)
}else {
print(error.localizedDescription)
}
}
func loginButtonDidLogOut(loginButton: FBSDKLoginButton!) {
print("logged out")
}
// Action for facebook login button
@IBAction func fbLoginAction(sender: AnyObject) {
let fbLoginManager : FBSDKLoginManager = FBSDKLoginManager()
fbLoginManager.logInWithReadPermissions(["email"], fromViewController: self) { (result, error) -> Void in
let fbloginresult : FBSDKLoginManagerLoginResult = result
if(fbloginresult.grantedPermissions.contains("email"))
{
self.getFBUserData()
// fbLoginManager.logOut()
}
}
}
// function to get data from facebook login
func getFBUserData(){
if((FBSDKAccessToken.currentAccessToken()) != nil){
FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, first_name, last_name, picture.type(large), email"]).startWithCompletionHandler({ (connection, result, error) -> Void in
if (error == nil){
let imageUrlDic: NSDictionary = (result.objectForKey("picture"))?.objectForKey("data") as! NSDictionary
let imageUrl = imageUrlDic.objectForKey("url") as! String
SingletonClass.sharedInstance.name = result.objectForKey("first_name") as! String
SingletonClass.sharedInstance.userImage = imageUrl
// print(result)
self.performSegueWithIdentifier("loggedIn", sender: self)
}
})
}
}
@IBAction func googlePlusLogin(sender: AnyObject) {
signIn.authenticate();
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}