我正在尝试将以下代码行从Objective C转换为新的编程语言
Swift.也许有人可以帮助我并概述差异.太棒了!
if (FBSession.activeSession.state == FBSessionStateCreatedTokenLoaded) { [FBSession openActiveSessionWithReadPermissions:@[@"public_profile"] allowLoginUI:NO completionHandler:^(FBSession *session,FBSessionState state,NSError *error) { // Handler for session state changes // This method will be called EACH time the session state changes,// also for intermediate states and NOT just when the session open [self sessionStateChanged:session state:state error:error]; }];}
谢谢,托比亚斯
解决方法
这是我的答案:很少关键字像FBSessionStateCreatedTokenLoaded抛出错误给我..所以这可能会有所帮助
func application(application: UIApplication,didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { // Whenever a person opens the app,check for a cached session if FBSession.activeSession().state == FBSessionState.CreatedTokenLoaded { // If there's one,just open the session silently,without showing the user the login UI FBSession.openActiveSessionWithReadPermissions(["public_profile"],allowLoginUI: false,completionHandler: { (session,state,error) -> Void in self.sessionStateChanged(session,state: state,error: error) }) } return true } func sessionStateChanged(session : FBSession,state : FBSessionState,error : NSError?) { // If the session was opened successfully if state == FBSessionState.Open { println("Session Opened") } // If the session closed if state == FBSessionState.Closed { println("Closed") } }
点击按钮点击Facebook登录
@IBAction func FacebookLoginPressed(Sender: AnyObject) { if (FBSession.activeSession().state == FBSessionState.Open || FBSession.activeSession().state == FBSessionState.OpenTokenExtended) { // Close the session and remove the access token from the cache // The session state handler (in the app delegate) will be called automatically FBSession.activeSession().closeAndClearTokenInformation() } else { // Open a session showing the user the login UI // You must ALWAYS ask for public_profile permissions when opening a session FBSession.openActiveSessionWithReadPermissions(["public_profile"],allowLoginUI: true,completionHandler: { (session:FBSession!,state:FBSessionState,error:NSError!) in let appDelegate = UIApplication.sharedApplication().delegate as AppDelegate // Call the app delegate's sessionStateChanged:state:error method to handle session state changes appDelegate.sessionStateChanged(session,error: error) }) } }
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。