问题:
使用 FB SDK 和 openActiveSessionWithReadPermissions 方法,当应用程序从 Facebook 网络或 Facebook 应用程序重新打开时,完成处理程序似乎不会被调用,并且我得到以下错误输出:
FBSDKLog:从 FBSessionStateCreated 到 FBSessionStateClosed 的 FBSession INVALID转换 FBSDKLog:从 FBSessionStateCreated 到 FBSessionStateCreatedOpening 的 FBSession 转换
语境
- 使用 Facebook SDK 3.2.1
- 应用程序是为 iOS 5.0+ 构建的
- 使用 xCode 4.6.1
- 在模拟器 iOS 5.1 上测试
- 在 iPhone 4S 上测试,运行 iOS 6.1.2(不使用 6.0 社交框架,因为想要测试 5.0+ 的实现)
- 更新最初为 iOS 3.0 构建的应用程序并使用旧版本的 sharekit,但现在已针对 ARC 进行了更新,并且我相信共享工具包实现已全部被注释掉 - 希望问题不是与旧共享工具包冲突函数,在代码中找不到任何
为解决而采取的步骤
搜索整个 Stack Overflow,发现提到的类似问题,但不是解决方案
- ios6 facebook 集成登录始终 FBSessionStateClosedLoginFailed 永远不会打开(我已经实现了 bool:应用程序)
- Facebook iOS SDK 3.0 - 会话未打开
- Facebook SDK 3.1 - 验证访问令牌时出错
- 在 FB 设置面板中拥有正确的应用程序包
- 拥有正确的 Facebook 应用程序 ID 是 plist
- 已打开 FB 日志记录 FBSettings setLoggingBehavior
规格:
这些是我在应用程序中实现 Facebook 连接所采取的步骤。
- 我采取的第一步是浏览 Facebook 教程:https ://developers.facebook.com/docs/tutorials/ios-sdk-tutorial/ 。我得到了第一部分,身份验证部分按预期工作(我按照教程的指示构建了一个单独的应用程序。)
- 然后我在我正在更新的应用程序的教程中采取了相同的步骤,这不起作用
- 然后我按照https://developers.facebook.com/docs/howtos/login-with-facebook-using-ios-sdk/上的说明进行操作(与教程非常相似)
- 我又遇到了问题
- 然后花了很多时间寻找解决方案,找不到一个
代码中的高级步骤:
- 我在 AppDelegate 中设置了我的 FB 方法
- 在特定的视图控制器中,我有一个按钮,它调用 openSessionWithAllowLoginUI 方法来启动登录过程
代码
AppDelegate.m
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
// set up facebook logging
[FBSettings setLoggingBehavior:[NSSet setWithObjects:FBLoggingBehaviorFBRequests, FBLoggingBehaviorFBURLConnections, FBLoggingBehaviorAccessTokens, FBLoggingBehaviorSessionStateTransitions, nil]];
// Call the ACAccountStore method renewCredentialsForAccount, which will update the OS's understanding of the token state
ACAccountStore *accountStore;
ACAccountType *accountTypeFB;
if ((accountStore = [[ACAccountStore alloc] init]) &&
(accountTypeFB = [accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook] ) ){
NSArray *fbAccounts = [accountStore accountsWithAccountType:accountTypeFB];
id account;
if (fbAccounts && [fbAccounts count] > 0 &&
(account = [fbAccounts objectAtIndex:0])){
[accountStore renewCredentialsForAccount:account completion:^(ACAccountCredentialRenewResult renewResult, NSError *error) {
//we don't actually need to inspect renewResult or error.
if (error){
}
}];
}
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
// We need to properly handle activation of the application with regards to Facebook Login
// (e.g., returning from iOS 6.0 Login Dialog or from fast app switching).
NSLog(@"Calling app did become active");
[FBSession.activeSession handleDidBecomeActive];
}
/*
* Callback for session changes.
*/
- (void)sessionStateChanged:(FBSession *)session
state:(FBSessionState) state
error:(NSError *)error
{
NSLog(@"Session State Changed");
switch (state) {
case FBSessionStateOpen:
if (!error) {
// We have a valid session
NSLog(@"User session found");
}
break;
case FBSessionStateClosed:
case FBSessionStateClosedLoginFailed:
[FBSession.activeSession closeAndClearTokenInformation];
break;
default:
break;
}
[[NSNotificationCenter defaultCenter]
postNotificationName:FBSessionStateChangedNotification
object:session];
if (error) {
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle:@"Error"
message:error.localizedDescription
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alertView show];
}
}
/*
* Opens a Facebook session and optionally shows the login UX.
*/
- (BOOL)openSessionWithAllowLoginUI:(BOOL)allowLoginUI {
NSLog(@"Openning session with Facebook");
return [FBSession openActiveSessionWithReadPermissions:nil
allowLoginUI:allowLoginUI
completionHandler:^(FBSession *session,
FBSessionState state,
NSError *error) {
[self sessionStateChanged:session
state:state
error:error];
}];
}
/*
* If we have a valid session at the time of openURL call, we handle
* Facebook transitions by passing the url argument to handleOpenURL
*/
- (BOOL)application:(UIApplication *)application
openURL:(NSURL *)url
sourceApplication:(NSString *)sourceApplication
annotation:(id)annotation {
// attempt to extract a token from the url
NSLog(@"Calling open URL");
return [FBSession.activeSession handleOpenURL:url];
}
- (void) closeSession {
NSLog(@"Clossing Facebook Sessions");
[FBSession.activeSession closeAndClearTokenInformation];
}
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url
{
NSLog(@"handleOpenUrl Called");
return [FBSession.activeSession handleOpenURL:url];
}
使用按钮查看控制器
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
// Register for Facebook change notification
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(sessionStateChanged:)
name:FBSessionStateChangedNotification
object:nil];
}
- (IBAction)login:(id)sender {
ATIAppDelegate *myAppDelegate = (ATIAppDelegate *)[[UIApplication sharedApplication]delegate];
[myAppDelegate openSessionWithAllowLoginUI:YES];
}
我认为问题可能是什么?
- 似乎它可能与令牌有关?
- 或者也许是通知中心?
- 请注意,在测试期间,我一直在撤销 Facebook 应用程序对我的帐户的访问权限,然后尝试再次登录该应用程序,我发现这些已导致其他用户出现问题