使用自定义按钮登录Facebook

Question

我已成功使用facebook SDK登录并获取个人资料图片和名称。 但这是相同的观点。 我想知道如何在登录后更改为另一个视图。

AppDelegate.m文件

- (void)applicationDidBecomeActive:(UIApplication *)application {
[[FBSession activeSession] handleDidBecomeActive];
}
-(BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation{
return [[FBSession activeSession]handleOpenURL:url];
}

viewController.m文件

@interface loginViewController () <FBLoginViewDelegate>
@property (weak, nonatomic) IBOutlet FBLoginView *loginView;
@property (weak, nonatomic) IBOutlet FBProfilePictureView *ProfilePic;
@property (weak, nonatomic) IBOutlet UILabel *ProfileName;

- (void)viewDidLoad {
  [super viewDidLoad];
  self.loginView.delegate = self;
}

#pragma mark FBLoginviewDelegate
-(void)loginViewFetchedUserInfo:(FBLoginView *)loginView user:(id<FBGraphUser>)user{
self.ProfilePic.profileID = user.objectID;
self.ProfileName.text = user.name;
}
-(void)loginViewShowingLoggedOutUser:(FBLoginView *)loginView{
self.ProfilePic.profileID = nil;
self.ProfileName.text = nil;
}

Answer 1

这是自定义按钮方法：

- (void)viewDidLoad {
[super viewDidLoad];
 //  self.loginView.delegate = self;    //hide one 
 }


 - (IBAction)butFacebooklogin:(id)sender
{
NSArray *permissions = @[@"email",@"user_about_me",@"user_status",@"user_location"];

// OPEN Session!
[FBSession openActiveSessionWithReadPermissions:permissions
                                   allowLoginUI:YES
                              completionHandler:^(FBSession *session,
                                                  FBSessionState status,
                                                  NSError *error) {
                                  // if login fails for any reason, we alert
                                  if (error) {

                                      //NSLog(@"error %@",error);
                                      // show error to user.

                                  } else if (FB_ISSESSIONOPENWITHSTATE(status)) {

                                      // no error, so we proceed with requesting user details of current facebook session.
                                      //NSLog(@"we are here");
                                      //NSLog(@"----%@",[session accessTokenData].accessToken);

                                    //  NSString *tok = [session accessTokenData].accessToken;
                                     // NSLog(@"tok 2");



                                      [[FBRequest requestForMe] startWithCompletionHandler:^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *user, NSError *error) {
                                          if (error) {

                                              NSLog(@"error:%@",error);


                                          }
                                          else
                                          {

                                             /*

                                              NSString *userlocation=[NSString stringWithFormat:@"%@",user.location[@"name"]];

                                              NSArray *items = [userlocation componentsSeparatedByString:@","];

                                              NSString *usercity, *userstate;

                                              if ([items count]>0) {
                                                  usercity=[items objectAtIndex:0];

                                                  userstate=[items objectAtIndex:1];

                                                  userstate = [userstate stringByReplacingOccurrencesOfString:@" " withString:@""];
                                              }
                                              else
                                              {
                                                  usercity=@"";
                                                  userstate=@"";
                                              }

                                              */

                                              NSString *email=[user objectForKey:@"email"];



                                              if (email.length>0) {
                                                  email=[user objectForKey:@"email"];
                                              }

                                              else
                                              {
                                                  email=@"";
                                              }





                                              NSString *userUpdate =[NSString stringWithFormat:@"user_id=%@&fname=%@&lname=%@",email,user.first_name,user.last_name,nil];

                                               NSLog(@" RequestString for get login details: %@",userUpdate); 

  // here add ur segue or push view method
                                          }
                                      }];
                                      // [self promptUserWithAccountName];   // a custom method - see below:
                                  }
                              }];
    }

Answer 2

在最新的FB SDK中，这不再起作用了。 FBSession（以及FBRequest）类已被删除。

现在您必须使用FBSDKLoginManager类及其方法

- (void)logInWithReadPermissions:(NSArray *)permissions handler:(FBSDKLoginManagerRequestTokenHandler)handler;

登录和获取用户信息的示例代码：

FBSDKLoginManager* lm = [[FBSDKLoginManager alloc] init];
[lm logInWithReadPermissions:@[@"public_profile", @"email"] fromViewController:self handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {

    // no error, so get user info
    if (!error && !result.isCancelled)
    {  
      [[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:nil]
       startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {

         if (!error) {
             NSLog(@"fetched user:%@  and Email : %@", result,result[@"email"]);
         }
     }];
   }

}];

如前所述这里