iOS Facebook Graph API使用“下一个”或“上一个” URL通过SDK进行分页

因此，在寻找明显答案的过程中，我偶然发现了github.com上的Facebook iOS SDK源，并发现了此类：https : //github.com/facebook/facebook-ios-sdk/blob/master/src/Network/FBGraphObjectPagingLoader .m。

在“ - (void)followNextLink”方法中，我找到了解决方案：

 FBRequest *request = [[FBRequest alloc] initWithSession:self.session
                                                  graphPath:nil];

    FBRequestConnection *connection = [[FBRequestConnection alloc] init];
    [connection addRequest:request completionHandler:
     ^(FBRequestConnection *innerConnection, id result, NSError *error) {
         _isResultFromCache = _isResultFromCache || innerConnection.isResultFromCache;
         [innerConnection retain];
         self.connection = nil;
         [self requestCompleted:innerConnection result:result error:error];
         [innerConnection release];
     }];

    // Override the URL using the one passed back in 'next'.
    NSURL *url = [NSURL URLWithString:self.nextLink];
    NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
    connection.urlRequest = urlRequest;

    self.nextLink = nil;

    self.connection = connection;
    [self.connection startWithCacheIdentity:self.cacheIdentity
                      skipRoundtripIfCached:self.skipRoundtripIfCached];

上面有/没有很多我不需要的代码，因此我能够（借助于此SO OP）将其压缩为：

/* make the API call */
FBRequest *request = [[FBRequest alloc] initWithSession:FBSession.activeSession graphPath:nil];
FBRequestConnection *connection = [[FBRequestConnection alloc] init];
[connection addRequest:request completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {

    NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] initWithDictionary:@{@"friends": [result objectForKey:@"data"], @"paging": [result objectForKey:@"paging"]}];
    NSLog(@"%@", dictionary);
    block(dictionary, error);
}];

// Override the URL using the one passed back in 'next|previous'.
NSURL *url = [NSURL URLWithString:paginationUrl];
NSMutableURLRequest* urlRequest = [NSMutableURLRequest requestWithURL:url];
connection.urlRequest = urlRequest;

[connection start];

为了帮助别人谁可能需要一个更通用的方法，我编译很多我的Facebook API调用图形为依据发现@ https://gist.github.com/tamitutor/c65c262d8343d433cf7f。