ios - 如果用户已登录，如何隐藏 FBLoginView？

Question

默认情况下，FBLoginView 显示“登录”或“注销”，无论用户是否通过身份验证；

如果用户通过身份验证，我想隐藏 FBLoginView。我怎样才能做到这一点？如何检查用户是否已通过身份验证？

谢谢

Answer 1

编辑：在移动框架之前，您应该尝试执行以下任一操作：

loginview.hidden = YES;

或者

[loginview setHidden:YES];

使用 HelloFacebookSample，您可以简单地将 FBLoginView 框架移出屏幕。如果用户从登录更改为注销（反之亦然），委托方法将触发。

- (void)loginViewShowingLoggedInUser:(FBLoginView *)loginView {
    // first get the buttons set for login mode
    NSLog(@"FB logged in - token expiration: %@",[[FBSession activeSession] accessTokenData].expirationDate);

    //User logged in. Move FBLoginView off the screen
    loginview.frame = CGRectOffset(loginview.frame, 5, -100);

    self.buttonPostPhoto.enabled = YES;
    self.buttonPostStatus.enabled = YES;
    self.buttonPickFriends.enabled = YES;
    self.buttonPickPlace.enabled = YES;

    // "Post Status" available when logged on and potentially when logged off.  Differentiate in the label.
    [self.buttonPostStatus setTitle:@"Post Status Update (Logged On)" forState:self.buttonPostStatus.state];
}

- (void)loginViewShowingLoggedOutUser:(FBLoginView *)loginView {

    //User logged off. Move FBLoginView back within view
    loginview.frame = CGRectOffset(loginview.frame, 5, 5);    // test to see if we can use the share dialog built into the Facebook application

    FBShareDialogParams *p = [[FBShareDialogParams alloc] init];
    p.link = [NSURL URLWithString:@"http://developers.facebook.com/ios"];
#ifdef DEBUG
    [FBSettings enableBetaFeatures:FBBetaFeaturesShareDialog];
#endif
    BOOL canShareFB = [FBDialogs canPresentShareDialogWithParams:p];
    BOOL canShareiOS6 = [FBDialogs canPresentOSIntegratedShareDialogWithSession:nil];

    self.buttonPostStatus.enabled = canShareFB || canShareiOS6;
    self.buttonPostPhoto.enabled = NO;
    self.buttonPickFriends.enabled = NO;
    self.buttonPickPlace.enabled = NO;

    // "Post Status" available when logged on and potentially when logged off.  Differentiate in the label.
    [self.buttonPostStatus setTitle:@"Post Status Update (Logged Off)" forState:self.buttonPostStatus.state];

    self.profilePic.profileID = nil;
    self.labelFirstName.text = nil;
    self.loggedInUser = nil;
}

在此示例中，您必须FBLoginView *loginview在头文件中声明。