Question

我试图在我的应用程序中实现Facebook登录但是当我尝试登录它进入Facebook应用程序并返回到我的游戏但登录按钮不会退出并且如果我尝试获取任何信息，例如访问令牌，授予权限或拒绝权限，它是零。这是我的代码：

import Foundation
class IntroScene: SKScene, FBSDKLoginButtonDelegate {
let loginButton: FBSDKLoginButton = {
    let button = FBSDKLoginButton()
    button.readPermissions = ["email"]
    return button
}()

override func didMove(to view: SKView) {
    self.backgroundColor = UIColor.black

    view.addSubview(loginButton)
    loginButton.center = (self.view?.center)!
    loginButton.delegate = self
}

func loginButtonDidLogOut(_ loginButton: FBSDKLoginButton!) {

}

func loginButtonWillLogin(loginButton: FBSDKLoginButton!) -> Bool {
    return true
}

func loginButton(_ loginButton: FBSDKLoginButton!, didCompleteWith result: FBSDKLoginManagerLoginResult!, error: Error!) {
    if(error == nil)
    {
        print("login complete")
        //print(FBSDKAccessToken.current()) -> crashes because its nil
        //print(result.grantedPermissions) -> crashes its nil
    }
    else{
        print(error.localizedDescription)
    }
}
}

我的info.plist如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>UIViewControllerBasedStatusBarAppearance</key>
    <false/>
    <key>LSApplicationQueriesSchemes</key>
    <array>
        <string>fbapi</string>
        <string>fb-messenger-api</string>
        <string>fbauth2</string>
        <string>fbshareextension</string>
    </array>
    <key>NSAppTransportSecurity</key>
    <dict>
        <key>NSExceptionDomains</key>
        <dict>
            <key>facebook.com</key>
            <dict>
                <key>NSIncludesSubdomains</key>
                <true/>
                <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
                <false/>
            </dict>
            <key>fbcdn.net</key>
            <dict>
                <key>NSIncludesSubdomains</key>
                <true/>
                <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
                <false/>
            </dict>
            <key>akamaihd.net</key>
            <dict>
                <key>NSIncludesSubdomains</key>
                <true/>
                <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
                <false/>
            </dict>
        </dict>
    </dict>
    <key>CFBundleURLTypes</key>
    <array>
        <dict>
            <key>CFBundleURLSchemes</key>
            <array>
            <string>//fbmyid</string>
        </array>
    </dict>
</array>
<key>FacebookAppID</key>
<string>//myid</string>
<key>FacebookDisplayName</key>
<string>Crazy Traffic Saga</string>
<key>CFBundleDevelopmentRegion</key>
<string>en</string>
<key>CFBundleExecutable</key>
<string>$(EXECUTABLE_NAME)</string>
<key>CFBundleIdentifier</key>
<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
<string>$(PRODUCT_NAME)</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleVersion</key>
<string>1</string>
<key>LSRequiresIPhoneOS</key>
<true/>
<key>UILaunchStoryboardName</key>
<string>LaunchScreen</string>
<key>UIMainStoryboardFile</key>
<string>Main</string>
<key>UIRequiredDeviceCapabilities</key>
<array>
    <string>armv7</string>
</array>
<key>UISupportedInterfaceOrientations</key>
<array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
    <string>UIInterfaceOrientationLandscapeRight</string>
</array>
<key>UISupportedInterfaceOrientations~ipad</key>
<array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationPortraitUpsideDown</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
    <string>UIInterfaceOrientationLandscapeRight</string>
</array>

Answer 1

感谢此帖：FB Login using Swift 3 not returning any values and not get back the user to the App after successful login 我发现了这个问题。还有一个应该添加到App Delegate的功能。以下是我如何让Facebook登录工作

下载SDK并添加到项目
根据Facebook网站设置info.plist

在app delegate中添加：

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
FIRApp.configure()
FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)

return true
}

public func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {

    return FBSDKApplicationDelegate.sharedInstance().application(
        app,
        open: url as URL!,
        sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String,
    annotation: options[UIApplicationOpenURLOptionsKey.annotation]
)
}

public func application(_ application: UIApplication, open url: URL,     sourceApplication: String?, annotation: Any) -> Bool {
        return FBSDKApplicationDelegate.sharedInstance().application(
            application,
            open: url as URL!,
            sourceApplication: sourceApplication,
            annotation: annotation)
}

在SKScene中，我正在显示按钮（也可以在视图控制器中）：

class IntroScene: SKScene, FBSDKLoginButtonDelegate {
    override func didMove(to view: SKView) {
        self.backgroundColor = UIColor.black
        let loginButton = FBSDKLoginButton()
        loginButton.center = (self.view?.center)!
        self.view?.addSubview(loginButton)
        loginButton.frame = CGRect(x: 0, y: 0, width: 360, height: 60) // makes it bigger
        loginButton.center = CGPoint(x: self.frame.midX, y: self.frame.midY + 90)
        loginButton.delegate = self
        loginButton.readPermissions = ["public_profile", "email"]
        if let _ = FBSDKAccessToken.current(){
            //already logged in 
            fetchProfile()
        }
    }
    func fetchProfile() {
    let parameters = ["fields": "first_name, email, last_name, picture"]

    FBSDKGraphRequest(graphPath: "me", parameters: parameters).start(completionHandler: { (connection, user, requestError) -> Void in

        if requestError != nil {
            print("----------ERROR-----------")
            print(requestError)
            return
        }
        let userData = user as! NSDictionary
        let email = userData["email"] as? String
        let firstName = userData["first_name"] as? String
        let lastName = userData["last_name"] as? String
        var pictureUrl = ""
        if let picture = userData["picture"] as? NSDictionary, let data = picture["data"] as? NSDictionary, let url = data["url"] as? String {
            pictureUrl = url
            print(pictureUrl)
        }
     })
     }

}

Answer 2

将此代码放入AppDelegate.swift

 func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
      return FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
 }



func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool {
        return FBSDKApplicationDelegate.sharedInstance().application(application, openURL: url, sourceApplication:  sourceApplication, annotation: annotation)
}

检查Facebook按钮中的FacebookAccessToken单击ViewController。

if FBSDKAccessToken.currentAccessToken() != nil {
            FBSDKLoginManager().logOut()
            return
}

let login:FBSDKLoginManager = FBSDKLoginManager()
login.logInWithReadPermissions(["email"], handler: { (result:FBSDKLoginManagerLoginResult!, error:NSError!) -> Void in
     if(error != nil){
            FBSDKLoginManager().logOut()
     }else if(result.isCancelled){
            FBSDKLoginManager().logOut()
     }else{
                //Handle login success
            self.returnUserData()
        }
 })

获取FacebookData的回复。

func returnUserData()
{
  let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "email"])
  graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in
      if ((error) != nil)
      {
            // Process error
            print("Error: \(error)")
       }
       else
       {
            print(result)

        }
    })
}

Answer 3

现在Facebook为您的iOS应用提供Swift sdk。 Swift sdk for Facebook

检查出来，玩得开心

Answer 4

不要忘记设置Keychain Sharing项目目标 - ＆gt;能力 - ＆gt;钥匙串分享 - ＆gt;切换开关 Keychain Sharing status

您可以按照http://ashishkakkad.com/2015/05/facebook-login-swift-language-ios/

进行操作

Facebook登录不能在swift中工作

4 个答案: