ios - 使用 Facebook SDK 3.1 for iOS 在应用程序相册上发布带有标题的图片，无论它是否存在

Question

使用toblerpwn 答案我设法将图片发布到我想要的应用程序相册。但这仅在已经创建应用程序专辑时才有效（因为我需要指定专辑 ID）。

另一方面，如果应用程序相册不存在，requestForUploadPhoto 便捷方法会创建应用程序相册并发布图片。

那么有人可以帮我弄清楚如何合并这两个行为吗？

Answer 1

感谢@deepak-lakshmanan，我设法解决了我的问题。

/USER_ID/photos这个想法是使用insted of发布到应用程序相册/ALBUM_ID/photos；这样，如果相册不存在，则会自动创建相册。

所以要遵循的步骤是：

• 获得发布权限
• 然后使用检索用户ID/me
• 最后将图片发布到应用相册/USER_ID/photos

这是我的代码，以防有人遇到这个问题，我正在使用适用于 iOS 的 Facebook SDK 3.1：

- (void)sendRequestFacebookPublishPermission {
    NSArray *permissions = [[NSArray alloc] initWithObjects:@"publish_stream", nil];
    if(!FBSession.activeSession.isOpen ) {
        [FBSession openActiveSessionWithPublishPermissions:permissions
                                           defaultAudience:FBSessionDefaultAudienceFriends
                                              allowLoginUI:YES
                                         completionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
                                             [self requestFacebookPublishPermissionCompleted:session status:status error:error];
                                         }];
    } else if ([FBSession.activeSession.permissions indexOfObject:@"publish_actions"] == NSNotFound) {
        [FBSession.activeSession reauthorizeWithPublishPermissions:permissions
                                                   defaultAudience:FBSessionDefaultAudienceFriends
                                                 completionHandler:^(FBSession *session, NSError *error) {
                                                     [self requestFacebookPublishPermissionCompleted:session status:FBSessionStateOpen error:error];
                                                 }];
    } else {
        [self sendRequesFacebooktUserInfo];
    }
}

- (void)requestFacebookPublishPermissionCompleted:(FBSession *)session
                                            status:(FBSessionState)status
                                             error:(NSError *)error {
    if (error) {
        DLog(@"%@", error.localizedDescription);
    } else {
        [self sendRequesFacebooktUserInfo];
    }
}

-(void)sendRequesFacebooktUserInfo {
    FBRequestConnection *newConnection = [[FBRequestConnection alloc] init];

     // output the results of the request
    FBRequestHandler handler = ^(FBRequestConnection *connection, id result, NSError *error) {
        [self requestFacebookUserInfoCompleted:connection result:result error:error];
    };

    // create the request object, using the fbid as the graph path
    FBRequest *request = [[FBRequest alloc] initWithSession:FBSession.activeSession graphPath:@"me"];

    // add the request to the connection object
    [newConnection addRequest:request completionHandler:handler];

    // if there's an outstanding connection, just cancel
    [self.requestConnection cancel];

    // keep track of our connection, and start it
    self.requestConnection = newConnection;
    [newConnection start];
}

- (void)requestFacebookUserInfoCompleted:(FBRequestConnection *)connection
                                result:(id)result
                                 error:(NSError *)error {
    // not the completion we were looking for...
    if (self.requestConnection && connection != self.requestConnection) {
        return;
    }

    // clean this up, for posterity
    self.requestConnection = nil;

    if (error) {
        DLog(@"%@", error.localizedDescription);
    } else {
        FBGraphObject *dictionary = (FBGraphObject *)result;
        NSString* userId = (NSString *)[dictionary objectForKey:@"id"];
        [self sendRequestFacebookPublishOnAlbum:userId];
    }
}

- (void)sendRequestFacebookPublishOnAlbum:(NSString*)fbId {
    UIImage *imageToPost = /* get the image you need*/ ;

    /*
    //--- Facebook SDK convenience method : requestForUploadPhoto won't let me post image description ---//
    FBRequestConnection *newConnection = [FBRequestConnection startForUploadPhoto:screenshot completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
        [self requestPostCardOnFacebookCompleted:connection result:result error:error];
    }];

    // if there's an outstanding connection, just cancel
    [self.requestConnection cancel];

    // keep track of our connection, and start it
    self.requestConnection = newConnection;
    //-----------------------------------------------------------------------------------------------------//
     */


    //--- http://stackoverflow.com/questions/12486852/facebook-ios-sdk-cannot-specify-an-album-using-fbrequests-requestforuploadphot ---//
    NSString *messagePublie = laCarte.message;
    NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:
                                screenshot, @"picture",
                                messagePublie , @"name",
                                nil] ;

    FBRequestConnection *newConnection = [[FBRequestConnection alloc] init];

    FBRequestHandler handler = ^(FBRequestConnection *connection, id result, NSError *error) {
        [self requestFacebookPublishOnAlbumCompleted:connection result:result error:error];
    };

    NSString *graphPath = [NSString stringWithFormat:@"%@/photos",fbId];

    FBRequest *request = [[FBRequest alloc] initWithSession:FBSession.activeSession graphPath:graphPath parameters:parameters HTTPMethod:@"POST"];
    [newConnection addRequest:request completionHandler:handler];

    // if there's an outstanding connection, just cancel
    [self.requestConnection cancel];

    // keep track of our connection, and start it
    self.requestConnection = newConnection;
    [newConnection start];
}

- (void)requestFacebookPublishOnAlbumCompleted:(FBRequestConnection *)connection result:(id)result error:(NSError *)error {
    if (self.requestConnection && connection != self.requestConnection) {
        return;
    }

    // clean this up, for posterity
    self.requestConnection = nil;

    if (error) {
        DLog(@"%@", error.localizedDescription);
    } else {
        DLog(@"%@", "Done");
    }
}