我想把一些Facebook整合到我的应用程序中.在这一点上,我已经设法登录,发贴到朋友的墙上,检索朋友列表等.除了一件事外,一切都OK
如果用户从your Facebook settings / Applications删除该应用程序
然后进入iOS应用程序,代码不会识别Facebook应用程序已从用户设置中删除,并假定已登录(这是问题,因为如果用户尝试发布到朋友的墙上,应用程序会没有).
然后,用户关闭iOS应用程序并重新启动它…通过重新启动,iOS应用程序“已修复”,并检测到用户不再登录.
用户从设置中删除Facebook应用程序后才能立即检测到该时刻,以便将登录流程提供给用户…
这是我的代码：
我的应用程序的第一幕
if([FBSession activeSession].state == FBSessionStateCreatedTokenLoaded)
{
NSLog(@"Logged in to Facebook");
[self openFacebookSession];
UIAlertView *alertDialog;
alertDialog = [[UIAlertView alloc] initWithTitle:@"Facebook" message:@"You're already logged in to Facebook" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil,nil];
[alertDialog show];
[alertDialog release];
return YES;
}
else{
NSLog(@"Not logged in to Facebook"); //Show the login flow
return NO;
}
这是openFacebookSession的代码
-(void)openFacebookSession
{
NSArray *permissions = [[NSArray alloc] initWithObjects:
@"publish_stream",nil];
[FBSession openActiveSessionWithPublishPermissions:permissions defaultAudience:FBSessionDefaultAudienceFriends allowLoginUI:YES completionHandler:^(FBSession *session,FBSessionState status,NSError *error) {
[self sessionStateChanged:session state:status error:error];
}];
}
sessionStateChanged的代码…
-(void)sessionStateChanged:(FBSession *)session state:(FBSessionState)state error:(NSError *)error
{
switch (state) {
case FBSessionStateOpen: {
NSLog(@"Session opened");
}
break;
case FBSessionStateClosed:
case FBSessionStateClosedLoginFailed:
[FBSession.activeSession closeAndClearTokenInformation];
break;
default:
break;
}
if (error) {
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle:@"Error"
message:error.localizedDescription
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alertView show];
}
}
非常感谢你！
解决方法
我发现这也发生在自己身上….发现当用户改变了他们的Facebook密码,我们不能再认证.手动重新同步/清除帐户会话允许他们再次登录.
-(void)syncFacebookAccount
{
[self forcelogout];
ACAccountStore *accountStore = [[ACAccountStore alloc] init];
ACAccountType *accountTypeFB = [accountStore accountTypeWithAccountTypeIdentifier:@"com.apple.facebook"];
if (accountStore && accountTypeFB) {
NSArray *fbAccounts = [accountStore accountsWithAccountType:accountTypeFB];
id account;
if (fbAccounts && [fbAccounts count] > 0 && (account = [fbAccounts objectAtIndex:0])) {
[accountStore renewCredentialsForAccount:account completion:^(ACAccountCredentialRenewResult renewResult,NSError *error) {
// Not actually using the completion handler...
}];
}
}
}
